Ghorban Vahabzadeh; Hojat Delavar; Jamshid Ghorbani; Mohammad Reza Ashrafi
Abstract
Abstract
Background and Purpose
Changing the quality of groundwater and increasing salinity of water resources are considered as a major threat for country's agricultural development, especially in arid and semi-arid lands. Preparing counter maps of salinity and salts can be an important step in the ...
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Abstract
Background and Purpose
Changing the quality of groundwater and increasing salinity of water resources are considered as a major threat for country's agricultural development, especially in arid and semi-arid lands. Preparing counter maps of salinity and salts can be an important step in the proper utilization of water resources. This research was carried out in Firoozabad plain in west of Fars province to evaluate the hydrogeochemical processes affecting groundwater quality.
Method
Preparation of the counter maps of the chemical parameters such as Electrical Conductivity (EC), chlorine and their variations along with the counter maps of variation trends of Total Dissolved Solids (TDSs), total hardness and Sodium Adsorption Ratio (SAR) in Firoozabad plain was performed using EC, NO3, TDS and hydrodynamic data of wells measured in East and West of Firoozabad plain. Preparation of similar maps was carried out using Schuler and Wilcox diagrams to produce coincidence lines.
Findings
Based on the maps of the chemical parameters in the studied areas along with variation diagrams and classifications of the data according to Wilcox and Schuler diagrams, the water classification indicated a declined quality of water for agricultural purposes in 2004 and 2011. Based on the obtained results for the drinking water classification, there were generally no significant changes in drinking quality except in 2011.
Conclusion
The amount of chlorine and electrical conductivity parameters in the Firoozabad plain increased from north and northwest to the center and eastern part of the plain and from east to center. Also, the results showed that based on the Schuler diagram from the aspect of drinking quality, the groundwater of this plain was classified into three classes: good, acceptable and moderate. However, in terms of quality for agricultural purposes, it was in C3S1, C1S1, C2S1 C3S2, C3S4 and C3S3 classes in 2011, and in C3S1, C1S1, and C2S1 classes in 2004 (first period). According to Wilcox, the water quality for agricultural purposes was decreased in 2004 and 2010. However, drinking water quality was rather stable except in 1390 which experienced a little bit decrease in quality.
Negar Ordooei; Mohammad Hadi Dehghani; Aida Bayati; Kambiz Larijani; Niaz Mahdi Esfahani
Abstract
Background and objective: Laboratory wastes are produced in small, but varied quantities. These wastes need to be managed correctly. Consequently, this research has undertaken a quantitative and qualitative assessment and management of the laboratory wastes of Zakaria Razi Laboratory Complex in TehranScience ...
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Background and objective: Laboratory wastes are produced in small, but varied quantities. These wastes need to be managed correctly. Consequently, this research has undertaken a quantitative and qualitative assessment and management of the laboratory wastes of Zakaria Razi Laboratory Complex in TehranScience Research Branch Islamic Azad University. Materials and Method: This study, primarily with the help of interviews, determined the most productive laboratories of the Complex, which then led to the selection of two educational laboratories and two research laboratories for qualitative and quantitative sampling. After sampling which the samples werecatalogued according to the four categories of corrosive, toxic, flammable and reactive. Results: The findings of this research show that 54% of the hazardous waste of the research laboratories is flammable and in the educational laboratories 56% of the waste produced is corrosive. Conclusion: In most of the laboratories in this complex (88%), a list of the hazardous waste produced is not compiled and stored, and in all but 16% of the laboratories where hazardous waste is disposed after being secured in appropriate containers, this waste is poured into the drain without any proper management. A list of produced wastes in each laboratory is required to be prepared, using the laboratory operator’s assistance.
Sima Zamand; Hossein Alidadi; Vahid Taghavimanesh
Abstract
Background: Fluoride is one of the 14 essential elements for organisms’ lives. Since the body's greatest need for fluoride should be supplied through drinking water, determination of the amount of fluoride in drinking water has great importance. The aim of this study was to measure the ...
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Background: Fluoride is one of the 14 essential elements for organisms’ lives. Since the body's greatest need for fluoride should be supplied through drinking water, determination of the amount of fluoride in drinking water has great importance. The aim of this study was to measure the concentrations of fluoride in sources of drinking water in urban and rural areas of Neyshabur in 2017 and compare it with existing standards.
Materials and Methods:This descriptive cross-sectional was conducted on urban and rural drinking water sources in Neyshabur in 2017. A total of 100 water samples were randomly collected from different sources in Neyshabur. The collected samples were then transferred to the Neyshabur Water and Wastewater Laboratory and the proportion of fluoride ion was measuredusing a spectrophotometer DR 2000 at 580 nm.
Results:The average concentration of fluoride in rural resources was obtained0.567± 0.12 mg/lin wells and 0.69 ± 0.13 mg/lin springs. The average concentration of fluoride in plain areas (0.662 ± 0.14 mg/l) was higher than mountainous areas (0.505 ± 0. 2 mg / l). The average concentrations of fluoride in urban wells, in urban reservoirs and in the water distribution networkwere (0.602 ± 0.034 mg / l),(0.597 ± 0.030 mg / L) and (0.595±0.039 mg /l) respectively.
Conclusion:The average concentration of fluoride in some water sources was lower than the standard level.Therefore, more study is needed to evaluate the daily fluoride intake in a variety of methods, and if the fluoride intake is less than standard level, adjustment of fluoride in water sources will benecessary for dental health.
Maryam Ghiasi; Hassan Narollahzadeh Saravi; Mohammad Binaii; Mahmod ghanei tehrani
Abstract
Introduction: Being free from human health risk factors is considered as the most important parameter of drinking water sources.The aim of the present study was quantative evaluation and identification of fungi in water of Shahid Rajaeii dam lake, and assessment of its health quality as drinking water ...
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Introduction: Being free from human health risk factors is considered as the most important parameter of drinking water sources.The aim of the present study was quantative evaluation and identification of fungi in water of Shahid Rajaeii dam lake, and assessment of its health quality as drinking water source of Sari (Mazandaran province). Materials and Methods: In the present study, samples were taken from five stations in six stages from June to February 2012. Every sample was diluted by sterile saline (100 and 10-1) and was cultured on SD and incubated at 27-30°C for 3-5 days. Finally, the number of colonies was recorded as Colony Forming Unit (CFU) per 100 mL. Also, teamperature, BOD5 and COD were measured. Results: The results showed that the numbers of isolated fungal colonies were significantly highest and lowest in August and February respectively. Moreover, the number of fungal colonies in the dam crown station was significantly higher than other stations. The correlation coefficient between the number of isolated colonies and the temperature, BOD5 and COD were 0.87, 0.60 and 0.66 respectively. The frequency of identified fungi were Aspergillus species (31.4%), various types of yeast (mainly Candida) (24.2%), Penicillium sp. (19.3%), Cladosporium sp.(10.3%), Mucor sp. (5.4%), Fusarium sp. (2.9%), sterile hype (2.8%), Alternaria sp. (2.3%) and Paecilomyces sp. (1.4%). Summery: The results showed the highest correlation coefficient between the counts of fungi and the changes in temperature, BOD5 and COD correspondingly. These factors play an important role in the fungal colonies counts. Moreover, the most fungal isolates were pathogenic, toxigenic and hazard to public health.
Mohammad Shamsoddin Dayani Tilaki; Hossein Alidadi; Ali Taghipour; Mohsen Yazdani; Ali Choupani; Ali Asghar Navaei
Abstract
Background: The use of new technologies has positive and negative effects on human society. Loudspeakers and sound systems can also make harm to humans and noise pollution. Shiite religious ceremonies have special religious occasions in addition to the five prayers and religious lectures. The ...
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Background: The use of new technologies has positive and negative effects on human society. Loudspeakers and sound systems can also make harm to humans and noise pollution. Shiite religious ceremonies have special religious occasions in addition to the five prayers and religious lectures. The high performance of audio systems in mourning applications requires proper use of this technology. The purpose of this study was to determine the sound pressure level in religious centers and on various religious occasions in mosques and chapels of Mashhad University of Medical Sciences. Material and methods: In this descriptive-analytical study, the sound pressure level was surveyed in all active mosques and chapels at Mashhad University of Medical Sciences in 2016. To determine the sound pressure level distribution, TES 1358 was used to measure the noise level. Conclusions:The mean sound pressure levels in the endowment, lecture, and mourning ceremonies were 87.14, 90.31 and 93.91 dB respectively. Comparison of the sound pressure level in the A-weighting network in a mourning ceremony with the US Environmental Protection Agency and the World Health Organization standards showed a significant difference (P-value = 0.013). Discussion:Since the average time for holding religious ceremonies and celebrations is up to 2 hours, the audio players and design of the interiors should be adjusted to a maximum sound pressure level of 80 dB. Keywords:Sound Pressure Level, Mosques, Religious Ceremonies, University of Medical Sciences
kazhal kakaei; Ali reza Riyahi Bakhtiari
Abstract
Background & Objective: Landfill which is known as the most common strategy for disposal of solid waste is considered as the latest option of solid waste management; however it cannot be removed completely. For this mean, the environmental impact assessment (EIA) is regarded as an important ...
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Background & Objective: Landfill which is known as the most common strategy for disposal of solid waste is considered as the latest option of solid waste management; however it cannot be removed completely. For this mean, the environmental impact assessment (EIA) is regarded as an important strategy to minimize its negative impacts. The aim of this study was to assess the situation of Hamedan landfill. Materials & Methods: For this object, in order to assess the environmental impact of Hamedan landfill was conducted by rapid environmental impact assessment matrix (RIAM) based on field visits and information gathering from multiple sources in 1393. Disposal option was evaluated by aferementioned method based on environmental components (physical-chemical (PC), Biological- ecological (BE), sociological-cultural (SC) and economical-operatinal (EO)). Results: The results showed that continuance of landfill current trend had the most negative scores with environmental score (ES) of -1311.. The highest and lowest negative scores belonged to the PC and SC with -768 and -40,respectively . Conclusion: In accordance with the obtained results, continuance of landfill current trend will led to the unacceptable health conditions along with severe environmental damages.
Hadi Nakhzari Moghadam
Abstract
Abstract Background and Aim: Humans in their environments are always exposed to radiation from radioactive materials in construction materials. Since humans are not far from these materials, the probability of radiation exposure is high. This is a dosimetric study of travertine stones used in Zahedan ...
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Abstract Background and Aim: Humans in their environments are always exposed to radiation from radioactive materials in construction materials. Since humans are not far from these materials, the probability of radiation exposure is high. This is a dosimetric study of travertine stones used in Zahedan in 2020 to determine the relationship between stone color and radioactivity. Materials and Methods: The building stones that existed and were used in Zahedan city were identified and listed. A total of 70 samples of travertine were analyzed by the MKS model pen dosimeter for determining gamma Dose Rate (EDR) as microsievert per hour, gamma Equivalent Dose (ED) as millisievert, and beta flux density as parts per square centimeter per minute (part/cm2.min). Results: The highest mean EDR was in travertine rocks in cream color as 0.15 μSv/h and the lowest was 0.01 μSv/h in white rock. The highest mean beta flux density was observed in travertine rocks in the cream color sample as 0.0016 part/cm2.min. The ED value of all samples was determined to be zero. Conclusion: The maximum amounts of EDR and beta flux for travertine rocks were related to cream-colored rocks, which were slightly higher than the global average. The average EDR for travertine rocks was slightly higher than the allowable limit. Also, the beta flux in travertine rocks was lower than the allowable limit. The mean value of beta beam flux density in the ambient air was zero. In all samples, the amount of ED was zero. The amount of background radiation in the ambient air of Zahedan was the global average.
Rasoul Alinezhad; Mehdi Yousefi; Hossein Ebrahimipour; Ali Taghipour; Amin Mohammadi
Abstract
Background and purpose: One of the most important relations between reducing organizational costs and maintaining the quality of services provided is the use of appropriate models for managing staff performance; Using these models can increase employee productivity. Therefore, this study aimed to evaluate ...
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Background and purpose: One of the most important relations between reducing organizational costs and maintaining the quality of services provided is the use of appropriate models for managing staff performance; Using these models can increase employee productivity. Therefore, this study aimed to evaluate the volume of environmental health activities in health centers. Materials and methods: This study was a descriptive and applied study that was done in both quantitative and qualitative dimensions. The pilot design of the model was carried out at Mazandaran University of Medical Sciences. Every 10 minutes was considered a unit of work. Results: 51 fields of activity were identified in the field of environmental health activities. The total number of units in the field of environmental health was calculated to be 1019 units. Out of the identified activities, the most frequent repetitions were conduct inspection and recorded in the system, followed by daily chlorometry with 100 and 84 repetitions, respectively. Conclusion: Personnel in any organization need a decisive mechanism to reduce inequality and a model of value for the amount of work that one does to improve productivity, increase efficiency, work motivation, and reduce inappropriate psychological stimuli in the workplace. This will be achieved using models such as the model presented in this study.
Sakineh Rostami Tarzm; Farid Gholamreza Fahimi; Reza Amir Nezhad; Aptin Rahnavard; Ahmad Tavana
Abstract
AbstractIntroduction & Purpose: Gold Mining companies are one of the industries that if not properly act in accordance with the sustainable development goals, they will cause a lot of environmental contamination in the environment. In these factories, tailings dams are places where effluents and ...
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AbstractIntroduction & Purpose: Gold Mining companies are one of the industries that if not properly act in accordance with the sustainable development goals, they will cause a lot of environmental contamination in the environment. In these factories, tailings dams are places where effluents and tailings materials from gold mining factories are collected and stored, and if not properly controlled and monitored, they can be a significant source of cyanide and heavy metals contamination. In this study, cyanide and heavy metals contamination of groundwater, soil and tailings of Takab gold mine were studied.Methods: In this descriptive cross-sectional study, 19 stations were selected for sampling of piezometric wells, soils around the mine, and tailings dam of the Takab gold mine during a one-year period. Water samples were transferred to the laboratory after stored at 4 °C. The Heavy metals in water samples, soil, and tailings were measured by Atomic Absorption Spectrophotometry (AAS) method.Results: The amount of cyanide, mercury and arsenic were measured in the range of 0-105, 0-83.7 µg L-1 and 0-120.4 mg L-1 in water samples, respectively. Also the amount of these contaminants (cyanide, mercury and arsenic) in soil samples were in the range of 37.02 - 58 mg kg-1, 0 - 25.6, and 27.6 - 420 µg kg-1, respectively. Conclusion: The results showed that, there was no significant difference in the mean concentration of arsenic in the water samples of the studied wells. But in the case of mercury and cyanide, the studied wells have a significant difference. Tailings samples had the highest concentration of cyanide and heavy metals, and had significant differences with soil and water samples.
Najmeh Bayat; Mahmood Alimohammadi; Ramin Nabizadeh Nodehi; Mohammad Hadi Dehghani; Kamyar Yaghmaeian; Masoud Binesh Berahmand; Mahmood Shams
Abstract
Background & objective: Parallel to the growth of Population and increasing healthcare needs ,the production of medical wastes is constantly increasing . Owing to the poor healthcare waste management ,this study surveys the state of waste management in Shariati Hospital of Tehran ...
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Background & objective: Parallel to the growth of Population and increasing healthcare needs ,the production of medical wastes is constantly increasing . Owing to the poor healthcare waste management ,this study surveys the state of waste management in Shariati Hospital of Tehran using IRAT in 2015 as part of WHO's strategy. Matrial&Methods:This descriptive study recorded 70 questions asked from environmental health and waste authorities after inspection the implementation waste management law using the IRAT tool . The waste products for sectors were weighed for one month. Results:The average weighing was 1911.68 kg waste production, which included 1.910.314 of infectious waste rate, 2.110.254 of domestic, 0.10.027 of Chemical/Pharmaceutical and 0.080.032 kg/b/d of sharp particles. According to the results, 18% of the bags and safety boxes with the capacity of more than 3/4 were collected with only 34 parts (72%) regular label waste bags. In addition, the hospital manager did not anticipate a specific budget to cover the costs of waste management. Conclusion:According to the IRAT analysis, the final score for the hospital was poor i.e. 50.71% which included 75.9% for separation, 78.9% for collection, 77.8% for transmission and storage and 81.7% for the treatment and disposal. The infectious waste rate ,that is 47.27%, seems more than that recommended by WHO. So it is necessary to have more educational programs in the field of waste separation for reducing the source of infections and hazardous wastes. Legal measures should be done to make the authorities of health centers implement the waste management rules.
Majid Kermani; Roshanak rezaei; hossein Salehi; sevda fallah jokandan
Abstract
Background: One of the most important environmental pollutants is color Compounds that are generally used in the textile, paper, cosmetics, food and leather industries, and their discharge into wastewater has harmful effects on the environment. The aim of this study is determination of efficiency of ...
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Background: One of the most important environmental pollutants is color Compounds that are generally used in the textile, paper, cosmetics, food and leather industries, and their discharge into wastewater has harmful effects on the environment. The aim of this study is determination of efficiency of ash and powder Rosa Damascena Wastes in removal of Reactive Blue from aqueous solutions. Methods:In this experimental study, after the preparing of powder and ash Rosa Damascena Wastes absorbent, the effect of various parameters of operation such as pH (3-10), the initial concentration of dye (25, 50, 100 and 300 mg/L), contact time (5-180 minutes) and absorbent dose (0.5- 6 g/L) were studied. Finally the results were analyzed by kinetics and isotherm modeling. Results: In this study, equilibrium time of powder and ash Rosa Damascena Wastes Obtained 60 and 45 minutes respectively. The Maximum efficiency of absorbent powder and ash was obtained 74 and 91 percent, respectively, at pH 3, contact time of equilibrium and absorbent dosage 4 g/L. isotherm studies matched with Freundlich isotherm models for both absorbents. Kinetic equations followed the pseudo-second of the model better. Conclusion: The results showed that Powder and ash of Rosa Damascena Wastes can be used as an effective, available and affordable absorbent for removal of color pollutants from aqueous solutions.
Mohammad Velayatzadeh
Abstract
This analytical descriptive study was conducted to evaluate the carbon emissions from the use of fossil fuels for gasoline, petroleum gas, petroleum fuels and kerosene during the period of 1306 to 1394 in 1397. The amount of fossil fuel consumption in the period from 1306 to 1394 was collected using ...
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This analytical descriptive study was conducted to evaluate the carbon emissions from the use of fossil fuels for gasoline, petroleum gas, petroleum fuels and kerosene during the period of 1306 to 1394 in 1397. The amount of fossil fuel consumption in the period from 1306 to 1394 was collected using the statistics of consumption of petroleum products, which was published by the Public Relations Publications Office of the National Iranian Oil Products Distribution Company. The total consumption of petroleum products in the period between 1306 and 1394 shows that there was a positive growth, so that in 1394 it was consumed by 73.1 billion L. The amount of carbon emissions from gasoline consumption in the year 1306 and 1394 was 9234500 and 59607018500 kg of carbon dioxide per year, respectively. The consumption of gas, kerosene and kerosene has grown steadily over the years and the consumption of these fossil fuels has increased. The analysis of the results shows that gasoline consumption has increased. Gasoline is one of the most consumed fossil fuels in Iran, which is mainly used in light car transport. Of course, it should be noted that the Iranian population has grown positively since the last 40 years.
Mohammad Jafari; Ali Jafari
Abstract
Introduction: One important problem in the rural areas is the issue of locating an appropriate landfill for solid wastes. Rural environmental protection is among the essentials of a rural developmnet. Lack of management in a sanitary landfill is a sign of Lack of planning and Lack of considering the ...
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Introduction: One important problem in the rural areas is the issue of locating an appropriate landfill for solid wastes. Rural environmental protection is among the essentials of a rural developmnet. Lack of management in a sanitary landfill is a sign of Lack of planning and Lack of considering the various environmental issues. The present study with the aim of locating a suitable landfill for rural solid wastes was conducted in Mahneshan city. Methods: In this research, to assess an appropriate landfill for rural wastes in mahneshan town, eight important and efficient parameters in locating an appropriate landfill including slope, elevation, distance from the rural points, channels, roads, faults, protected areas, and mines were considered. The identified parameters were compared by incorporating the Analytic Hierarchy Analysis (AHP) method in a pairwise manner and the corresponding weight of each factor, which indicates the effect of that factor, was calculated using the Expert Choice software. Results: by combining the weight layers obtained in the Arc GIS environment, the final location map for considered landfill was prepared and categorized in 5 classes (completely inapproppriate, inapproppriate, intermediate, approppriate and completely approprite). Conclusion: The results showed that in this categorization, the appropriate and completely appropriate zones with 643.9 and 374.5 squre kilometers had the highest preferability for the considered landfill respectively. These zones were prioritized with a 36.9% of the total area of the town, for this matter.
Mohammad Hadi Abolhasani; Niloofar Pirestani; Parinaz Ahmadi
Abstract
Background and Aim: Petroleum products such as crude oil, gasoline and gasoline are the most commonly used in the world, the major pollutants of water. About 10 million tons of oil are burnt annually in the world. Therefore, the development of new technologies for the elimination and purification of ...
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Background and Aim: Petroleum products such as crude oil, gasoline and gasoline are the most commonly used in the world, the major pollutants of water. About 10 million tons of oil are burnt annually in the world. Therefore, the development of new technologies for the elimination and purification of oil pollution is essential. There are several methods for cleaning up oil pollution and its derivatives. In this research, straw and chalk absorber was used as an organic adsorbent to remove diesel oil from wastewater. Materials and method: The straw and chalk were firstly determined using the FT-IR analysis. Then the adsorption experiments were performed discontinuously using diesel oil laboratory solutions. Optimum adsorption conditions were obtained by changing the factors affecting adsorption including pH, initial concentration of contaminant, contact time and adsorbent amount on adsorption at different levels, The oil absorption was determined by weighting method. Ultimately, the use of adsorbent for laboratory wastewater was studied. Results: The highest absorbent efficiency at the time of equilibrium was observed for absorbing oil using straw and chalk absorber in 15 minutes, which did not have a significant difference with other contact times (49.85% absorbance, p < 0.05) and the lowest value was observed without a significant difference in 3 minutes (37.19% absorption). The effect of straw absorbent values in 2 g/L was significantly higher than other amount of adsorbents (51.48% absorption, p < 0.05) and the lowest percentage of adsorption was significantly different from other values in 0.25 And 0.5 grams per liter (38.30%, p < 0.05). The fitting of Isotherm showed that the adsorption of diesel oil by straw and chalk with both Freundwich and Langmuir models were consistent with the high R2 (R2 = 0.99 and R2 = 0.96).
Reza Peykanpour Fard; Saeid Pourmanafi; Mohammad Erfan Kaghazchi
Abstract
Background and purpose: In recent years, the rapid growth of cities has been led to an increase in the production of various types of solid wastes in urban areas. Although landfilling is the last step in municipal solid waste management, but it is one of the common methods in developing countries’ ...
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Background and purpose: In recent years, the rapid growth of cities has been led to an increase in the production of various types of solid wastes in urban areas. Although landfilling is the last step in municipal solid waste management, but it is one of the common methods in developing countries’ municipal solid waste management. The purpose of this study is to accurately locate urban landfills in Naien county by using a combination of fuzzy and boolean methods. Materials and methods: In this study, AHP model was used to standardize and determine the weight of criteria and sub-criteria. The innovation of this research is the combination of the results of fuzzy and boolean logic. The fuzzy method consists of two groups, the first group is calculation the weight of criteria and the other one by calculating the weight of sub-criteria, and the results of boolean logic with five classes including calculation the weight of criteria and sub-criteria. Results: The results of this study show that the mentioned fuzzy and boolean methods have identified 34, 48779, 16000 and 7630 hectares of areas in Nain county as the most suitable areas for creating urban landfills. According to the weight of methods, a single map with four main patches is resulted by combination of these four methods, which includes a total of 5055 hectares in Nain. Conclusion: The results of this study show that the combination of fuzzy and boolean logic results provides better areas for landfill than using the methods individually.
Mahdi Abedini; Toraj Karimi; Adel Azar; Farzane Khosravani
Abstract
AbstractBackground and Aim: Hospital waste is the second most hazardous waste after radioactive waste. Although this waste threatens the health of citizens and the environment, disagreements between responsible organizations have made the management of hospital waste a serious problem. Inefficient management ...
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AbstractBackground and Aim: Hospital waste is the second most hazardous waste after radioactive waste. Although this waste threatens the health of citizens and the environment, disagreements between responsible organizations have made the management of hospital waste a serious problem. Inefficient management of this waste and the increase of its volume due to the spread of the coronavirus disease have increased the need to study this issue. So, this issue in the country requires accurate scientific, practical, and technical frameworks calculated according to the waste management law and relevant executive regulations. Therefore, in this study, to improve the inter-organizational problems of waste management, the conflicts and contradictions between the stakeholders of this issue were studied and structured.Materials and Methods: In this paper, participants were first identified using the journey-making method. Then, by drawing a power-interest diagram, the role of each participant was determined, and the main actors were identified. Next, the problem of hospital waste management actors was structured by the drama theory. Results: The results showed that according to the priorities and decision options of the five main actors at the negotiating table, there are many problems of non-cooperation and conflict between them. The most conflict is formed between waste organizations and hospitals and the most important type of problem between organizations is the problem of rejecting each other's options.Conclusion: Conflicts caused by rejection dilemmas can be considered the best type of conflict that can be improved by compromise and cooperation of organizations with each other. In this situation, these conflicts can be turned into cooperation by negotiating, flexibility, compromise, and of course, innovation in offering newer options.
Vahid Jabari; Alireza Safari; Alireza Ranaei
Abstract
Background and objective: In 1393, the daily average of waste produced in Qazvin was 300 tons that Per capita waste generation is 680 grams per person per day. To control these wastes, methods including composting, landfill and waste-to-energy conversion should be applied. The most common method of converting ...
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Background and objective: In 1393, the daily average of waste produced in Qazvin was 300 tons that Per capita waste generation is 680 grams per person per day. To control these wastes, methods including composting, landfill and waste-to-energy conversion should be applied. The most common method of converting waste to energy incineration is done in the power plant. According to the World Bank, to build a waste incineration plant for burning waste without using additional fuel. The calorific value must be at least 7 Mj/kg and not less than 6 Mj/kg .Also the weekly fluctuations should be less than 20%. Materials & Methods: In this study the samples of mixed wastes were taken to determine the quantitative and qualitative characteristics of the mixed wastes for one year. The samples were collected during one year. (Saturday, Monday and Thursday of each week) each time 5 samples were taken. To determine the characteristics of the output waste from processing facilities. Analysis of moisture, combustible materials and ash content, heating value were done according to standard criteria. Results: The results showed that the calorific value of Urban mixed waste of Qazvin is 6.133 Mj / Kg. The percentage of moisture was 50.3%, the ash 30.1% and the combustible materials 27. 9% .The calorific value wastes output of processing facilities was 11.8 Mj / Kg. Conclusion:The waste output of processing facilities is more adaptable with Tanner pattern. Due to the high calorific value wastes output from processing facilities and its low moisture content. The Refuse derived fuel facility should be applied for waste management in Qazvin.
HOSEIN ALIDADI; Ali Asghar Najafpoor; somayeh etemadi mashhadi; Batoul Mohebrad; aliakbar dehghan
Abstract
Introduction: Waste leachate contains hazardous organic compounds such as nitrogen compounds and high concentrations of poisonous compounds; the remediation of these pollutants from the environment is considered as a global problem. These pollutants make serious environmental problems through their penetration ...
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Introduction: Waste leachate contains hazardous organic compounds such as nitrogen compounds and high concentrations of poisonous compounds; the remediation of these pollutants from the environment is considered as a global problem. These pollutants make serious environmental problems through their penetration into groundwater and bioaccumulation. Therefore, leachate treatment is essential with suitable and appropriate methods. Anaerobic digestion is considered as one of the most cost-effective methods for this mean. This study aimed to evaluate the efficiency of an anaerobic digester in simultaneous removal of chemical oxygen demand (COD) and TKN from landfill leachate during the process of anaerobic co-digestion for landfill leachate and fresh cow dung. Materials and Methods: In this study, landfill leachate of Mashhad and cow dung was mixed in 3/1, 1/1 and 1/3 ratios. These treatments were exposed under anaerobic digestion with same conditions such as environmental temperature. COD and TKN were measured at the beginning and the end of the process. Results: In the control treatment, COD decreased about 5% and the reduction of TKN was 9.09%. Whilst COD reduction was about 65%, 75%, and 70% in the treatments of 3/1, 1/1 and 1/3 Ratio respectively. Also, TKN decreased 33.26, 82.16 and 84.73% in the 3/1, 1/1 and 1/3 Ratio correspondingly. Conclusion: The results of this study indicated that the applied method is an efficient and economical approach for elimination of COD and TKN from waste leachate. Because it not only is considered as an environmentally friendly method for this regard, but also it will also make economic benefits from methane production.
ghorban asgari; Javad Faradmal; Abdolmotaleb Seid-mohammadi; Halime Almasi; somaye akbari
Abstract
Background and objective: Industrialization has led not only to an increase in water demand, but also to an increase in water pollution due to the discharge of polluted industrial wastewaters with high salt content, and the organic compounds such as phenol into the water bodies. This ...
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Background and objective: Industrialization has led not only to an increase in water demand, but also to an increase in water pollution due to the discharge of polluted industrial wastewaters with high salt content, and the organic compounds such as phenol into the water bodies. This study aimed to investigate the efficiency of electrocuagulation and electro-Fenton processes in phenol removal from saline wastewater using Taguchi exprimental design method. Material and methods: This experimental study was performed in a reactor (1 liter) with synthetic phenolic saline wastewater. In this study for electrocoagulation process, the effects of five operation parameters on phenol removal efficiency including reaction time (20-80 min), electrolyte (1-4%), pH (3-5-7-9), initial phenol concentration (500-1000-1500-250 mg/L) and current density (4-16 mA/cm2) were investigated in four levels by Taguchi L16 orthogonal array. Also for electro-Fenton process, the effects of six operation parameters on removal efficiency in five levels including reaction time (20-80 min), electrolyte (0-4%), pH (2-3-4-6-8), initial phenol concentration (250-500-1000-1500-2000), current density ( 0-16mA/cm2) and hydrogen peroxide (50-300mg/L) were evaluated by Taguchi L25 orthogonal array. The concentration of phenol was determined according to the estandard method in spectrophotometric wavelength of 500 nm. Results: Experimental data showed that the optimum phenol elimination condition in electrocuagulation process was initial phenol concentration of 250 mg/L, pH = 5, electrolyt = 3%, curent density of 8 mA/cm2 and reaction time of 60 min. The most influential factor in removal efficiency was the initial concentration (63.2%), and the lowest effect belonged to the electrolyt (4.2%). The optimum phenol removal condition for electro-Fenton process was initial concentration of 250 mg/L, pH:3, electrolyt:2%, hydrogen peroxide:150 mg/L, current density of 8 mA/cm2 and 20 mine contact time. The most influential factor in elimination efficiency was the curent density (29.12%), and the lowest influence on response variable belonged to the reaction time (3.08%). Conclusion: This study showed the electro-Fenton process was effective in the removal of phenolthat can be used as an appropriate process in wastewater treatment.
Mohammad Reza Hosseini; Reza Foladifard
Abstract
Background and purpose: The safe and health drinking water is one of the vital factors of human life. The reason for this issue is the existence of various strict standards as WHO and EPA in the world and 1053 standard in Iran in the recent years. This study was implemented to evaluate the effect of ...
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Background and purpose: The safe and health drinking water is one of the vital factors of human life. The reason for this issue is the existence of various strict standards as WHO and EPA in the world and 1053 standard in Iran in the recent years. This study was implemented to evaluate the effect of seasonal changes (spring and autumn) on the physical and chemical properties of drinking water in Sefid-allah village of Qom province. Materials and methods: Measurement of physical and chemical indicators was carried out by the rural wastewater organization of Qom from the potable water sources of Sefid-allah village in two seasons spring and autumn 1390 and 1391. Analyze of parameters like pH, Turbidity, EC, Hardness, CL, NO3−, NO2− , PO34−, NH3, SO42−, F−, CO32−, HCO3−, Ca2+, Mg2+, Na+, K+ and Mn2+ was done according to the standard methods of drinking waters (1053 standard). Results: The mean of residual chlorine, Turbidity, pH, TDS, Total Hardness and Alkalinity reported 0 (mg/lit), 0.995 (NTU), 7.41, 1037.5 (mg/l), 478 (mg/l) and 288 (mg/l, respectively. The results showed that, in among Cations and Anions there are the following sequence was established: Na+> Ca2+> Mg2+> K+ and SO42− > HCO3− > CL− > NO3− > F− > PO34−> NO2− > NH3- HCO3−, respectively. The concentration of pH, HCO3− and Mn2+ were higher than the limited value of the standard. As such, only the concentration average of Turbidity, Ca2+, Na+ and K+ in spring were more than autumn. Conclusion:In conclusion, shift in seasons caused changes in some of the indicators under review. Finally, was found that the quality of drinking water of Sefid-allah village, by correcting some of the parameters, there is no problem for used to drinking water.
Mohammad Ali Zazooli; Jamshid Yazdani; Mohsen Khanbabaee
Abstract
Background and purpose:The bulk of the waste of our country is considered to be corrupt.Compost is the best option for managing this waste component.That's why a lot of compost industries have been built in the country.Produced fertilizer compost should be in accordance with standards,so that it can ...
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Background and purpose:The bulk of the waste of our country is considered to be corrupt.Compost is the best option for managing this waste component.That's why a lot of compost industries have been built in the country.Produced fertilizer compost should be in accordance with standards,so that it can be used to improve soil quality;Therefore,the purpose of this study was to study the physical,chemical and biological properties of compost manure produced by compost industries in Mazandaran,Golestan and Guilan provinces in 2016 and compare them with standards. Materials and methods:This study is a descriptive-analytic study.Sampling and analysis of physical,chemical and biological parameters; Once a month during the 3 months of spring.Data were analyzed using SPSS16 statistical software. Results:The results showed that pH, particulate matter, phosphorus,percentage of foreign matter and heavy metals in Babol,Rasht and Aq Qala samplers were lower than standard standards of Iran,WHO and Guttos theory.In terms of moisture and C/N it is compost grade 2.For example,in terms of carbon dioxide,organic matter and nitrogen are in the compass grade I and Iran's Gotthes theory and are acceptable.In terms of fecal coliforms and Salmonella in Class A, it is considered to be in Class B leech seed. Conclusion:This study showed that the quality of compost produced is in grade 2 and therefore, in order to achieve grade 1 compost,measures such as separation at source and more principled utilization of the fertilization process are needed.
Ahmad Khoshbin; Alireza Pourkhabbaz
Abstract
Background & objectives: One of the major global concerns about the environment is the pollution of aquatic ecosystems by heavy metals. These elements contaminate aquatic environments and accumulate and concentrate through bioaccumulation in the tissues of living organisms at higher levels of the ...
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Background & objectives: One of the major global concerns about the environment is the pollution of aquatic ecosystems by heavy metals. These elements contaminate aquatic environments and accumulate and concentrate through bioaccumulation in the tissues of living organisms at higher levels of the food chain consumed by humans. In this study, the concentrations of three heavy metals, lead, nickel and cadmium, in the muscle tissue of two species of fish Otolithes ruber and Sphyraena forsteri in the fishing ports of Konarak and Pozm were investigated. Material & Methods: 36 fish samples were collected from Konarak and Pazm ports. After preparation of the samples by acid digestion, the concentrations of heavy elements lead, nickel and cadmium were measured by Contr-AA-700 atomic absorption spectrometer. Data were analyzed using SPSS software (version 20) and ANCOVA and Pearson correlation tests at a significance level of 0.05%. Results: According to the results of the study, there was no significant difference between the amounts of lead, nickel and cadmium in the muscle tissue of Otolithes ruber and Sphyraena forsteri (P> 0.05). The average concentrations of heavy metals lead, cadmium, and nickel in the muscle of fish caught from Konarak port were higher than the samples of Pozm Bay. Also, the concentrations of heavy metals lead, nickel and cadmium in Sphyraena forsteri fish were lower than those of Otolithes ruber samples. Conclusion: The results of the present study showed that the levels of lead and cadmium in the muscle tissue of the studied fish were lower than the standards of the US Food and Drug Administration, the UK Department of Fisheries and Agriculture, the World Food and Agriculture Organization and the US Environmental Protection Agency. The concentration of nickel in the muscle of the studied fish was higher than the permissible limit of the World Health Organization.
Ali Toolabi; Naser Torbati Zare; Yasan Kazem Zade; Hamid Sarhadi; Abozar Raisvand; Ziaeddin Bonyadi
Abstract
Background and purpose: Today, due to the dangers of chemical preservatives in food, alternative and safe methods such as the use of natural extracts of natural plants have increased. The aim of this study was to evaluate the antibacterial effects of Kenar fruit extract on the bacteria of Salmonella, ...
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Background and purpose: Today, due to the dangers of chemical preservatives in food, alternative and safe methods such as the use of natural extracts of natural plants have increased. The aim of this study was to evaluate the antibacterial effects of Kenar fruit extract on the bacteria of Salmonella, Shigella, Escherichia coli and Bacillus cereus.Materials and Methods: We prepared Kenar fruit extract by soaking or immersing in methanol. After concentrating by rotary device, we prepared 9 concentrations of the extract serially, then performed antibiogram by well method and determined MIC and MBC. We also used volumetric-volumetric solution of methanol and dimethyl sulfoxide in equal proportions as negative control and control disks and standard commercial antibiotics as positive control.Results: Based on the results, the diameter of inhition zone for dropletsfor Shigella, Salmonella, Bacillus cereus and Escherichia coli at a concentration of 80 mg/mL of methanolic extract of the plant was 24, 17, 59 and 19 mm, respectively. It was also found that methanolic extract of Kenar fruit had very good antibacterial effects on gram-positive bacterium Bacillus cereus compared to other target bacteria (which are gram-negative) and had significant growth inhibition and bactericidal effects at very low concentrations.Conclusion: The results showed that methanolic extract had very favorable antibacterial effects against four target bacteria. Therefore, it can be said that the compounds of methanolic extract of this plant can be used as important components of various products in the food, pharmaceutical, cosmetic and health industries.
Milad Abdollahi; Alireza Pourkhabbaz; Ahmad Khoshbin
Abstract
Background and purpose: Heavy metals, as one of the important groups of pollutants in the aquatic environment, enter aquatic ecosystems as a result of natural and human activities. These metals may be accumulated in the body of aquatic animals, including fish, and are a potential health hazard for ecosystems ...
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Background and purpose: Heavy metals, as one of the important groups of pollutants in the aquatic environment, enter aquatic ecosystems as a result of natural and human activities. These metals may be accumulated in the body of aquatic animals, including fish, and are a potential health hazard for ecosystems and living organisms, especially for humans. The present study was conducted with the aim of investigating the concentration of three heavy metals mercury, arsenic and copper in the muscle tissue, liver and skin in two species of two species of Otolithes ruber and Sphyraena forsteri in the fishing ports of Konarak and Pozm.Material & Methods: 36 fish samples were collected from Kanarak and Pezem ports. After preparing the samples, the concentration of heavy elements mercury, arsenic and copper was determined by the atomic absorption method. Data analysis was done using SPSS statistical software, version 20 and covariance tests and Pearson correlation test at a significance level of 0.05.Results: There was no significant difference between the amounts of the studied metals in muscle tissue, liver and inflamed and cauterized skin (p<0.05). The average concentration of heavy metals copper, mercury, and arsenic in the muscle tissue of Otolithes ruber 3.61, 0.01, and 0.02 respectively, and Sphyraena forsteri 2.38, 0.01, and 0.02 μg / g, respectively.Conclusion: The concentration of heavy metals in the muscle tissue was lower than the international standards of WHO and FAO.
Mohammad Reza Alipoor; Hossein Alidadi; Ali Asghar Najafpoor; Roya Peiravi; Hadi Rahmatiyar
Abstract
Background and objective: Industrial developments and urban sprawl have led to the production of huge proportions of wastewater. Wastewater is potentially harmful for humans and it has remarkably adverse effects on the natural environment. With regard to the importance of preserving health and protecting ...
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Background and objective: Industrial developments and urban sprawl have led to the production of huge proportions of wastewater. Wastewater is potentially harmful for humans and it has remarkably adverse effects on the natural environment. With regard to the importance of preserving health and protecting the natural resources against pollution, this study aimed to evaluate the performance of wastewater stabilization ponds in the wastewater treatment plant of Olang, Mashhad. Methods: This cross‐sectional study examined the raw wastewater and effluent of Olang treatment plant from 2011 to 2012. Weekly sampling as well as BOD5, COD and TSS tests were conducted according to the standard methods. The collected data were analyzed by SPSS software, one‐way ANOVA and one‐sample t‐test at a significance level of 0.05. Results: In 2011, the average concentration of BOD5, COD and TSS in the effluent was 75±30.67, 145±19.46 and 86±13.28 mg/L, respectively. In addition, their treatment efficacy was 79.79±10.77%,82.53±4.57% and 77.17±3.92%, respectively. The figures were respectively 83±14.08, 146±23.72 and 109±14.73 mg/L and 82.7±5.11%, 82.82±3.82% and 78.46±3.93% in 2012. Conclusion: The effluent could be used for agricultural irrigation since its features are compatible with the standard parameters. Paper Type: Research Article