Nastaran Aghelan; Soheil Sobhan Ardakani; Mehrdad Cheraghi; Bahareh Lorestani
Abstract
Background and Purpose: Phytoremediation is a new technology forremediation of contaminated soils, this study was conducted to evaluationof efficiency of EDTA, citric acid and salicylic acid chelating agents inphytoremediation enhancing of Amaranthus caudatus and Tagetes patula forelimination of Cr(III) ...
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Background and Purpose: Phytoremediation is a new technology forremediation of contaminated soils, this study was conducted to evaluationof efficiency of EDTA, citric acid and salicylic acid chelating agents inphytoremediation enhancing of Amaranthus caudatus and Tagetes patula forelimination of Cr(III) and Cu(II) from contaminated soils in 2018.Material and Methods: After soil pots contaminating by 50 and 100 (mg/kg)K2Cr2O7 and 200 and 400 (mg/kg) CuSO4 salts, and 2.5 (mmol/kg) of EDTAand citric acid (CA) and 2.0 (mmol/kg) of salicylic acid (SA) solution treating,the cultured seedlings were harvested after 60 days. Then, after seedlingsdigestion, Cr and Cu contents were determined using ICP-OESResults: Based on the results obtained, the maximum contents of Cr (mg/kg) in cultivated soil, root and stem samples of A. caudatus were 2.40, 5.18and 1.86 were found in the SA, EDTA and EDTA treatments, respectively andin T. patula with 2.74, 6.00 and 1.30 were found to be in the SA, EDTA andEDTA treatments, respectively. Also, the maximum contents of Cu (mg/kg)in cultivated soil, root and stem samples of A. caudatus with 6.74, 3.77 and3.34 were found to be in the SA, SA and EDTA treatments, respectively andin T. patula with 6.65, 3.45 and 9.50 were found to be in the SA, EDTA andEDTA treatments, respectively. On the other hand, translocation (TF) andbioconcentration (BCF) factors of A. caudatus both were greater than 1 insoils with 100 mg/kg added K2Cr2O7 containing CA, which indicates that thisspecies can be known as hyperaccumulator of CrConclusion: In conclusion, concerning to the considerable role of organic acidsin soil refining electrokinetic and phytoremediation efficiency enhancing,using of these soil amendment agents is recommended to cleanup ofcontaminated soil with heavy metals
Mohammad Hossein Nemati; Seyed Saeed Mosavi
Abstract
Abstract Background and Aim: To maintain the health of consumers and achieve food safety, the control of maximum allowed heavy metals in food should be considered. This study aimed to investigate the concentration of heavy metals of copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) in livestock tissues ...
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Abstract Background and Aim: To maintain the health of consumers and achieve food safety, the control of maximum allowed heavy metals in food should be considered. This study aimed to investigate the concentration of heavy metals of copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) in livestock tissues in the vicinity of Zinc Specialized Industrial Park. Material and Methods: Ten samples were collected from each sheep tissue (including meat, liver, kidney, and bone) in each of the four geographical directions. To compare the current situation, samples from a control area (Qarah Poshtlu area of Zanjan) were also considered. A dry ash method was used to digest organic matter. Results:Based on the results, the concentration of Cu was significantly high in the muscle and liver of the control group (P <0.05). The concentration of Zn was not affected by the study areas. The accumulation of Pb in the liver and bone and Cd in the muscle and liver of animals was significantly high in the western part of the study area (P <0.05). The levels of Cu in the kidney and bone tissues, Pb in the muscle and kidney tissues, and Cd in the kidney and bone tissues were not affected. The accumulation of Cu was inversely related to Pb and Cd. Conclusion:In general, the results showed that despite heavy metal accumulation in the west of the study area, the concentrations of these metals in the tissues of sheep around it were within the allowable range and they were not dangerous to consumers.
Soheil Sobhanardakani; Samireh Mahmodnezhad; Masoumeh Heydari
Abstract
Background & Objective: Heavy metals being among the major pollutants of aquatic ecosystems are considered as high-toxicity pollutants for organisms due to the non-biodegradable and persistent potential in the environment. Therefore, this study was carried out to analyse the presence of heavy metals ...
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Background & Objective: Heavy metals being among the major pollutants of aquatic ecosystems are considered as high-toxicity pollutants for organisms due to the non-biodegradable and persistent potential in the environment. Therefore, this study was carried out to analyse the presence of heavy metals (Zn, Cd, Cr and Cu) in water of Marivan River in 2013. Material & Methods: In this cross-sectional study, forty samples were taken from five selected stations during spring and summer seasons in 2013. After taken samples preparation, the concentrations of metal ions were investigated by spectrophotometry with three replications. All statistical analyses were performed using the SPSS 19.0 statistical package (p<0/05). Results: The results showed that the mean concentrations of metals (µg/l) in water samples for spring season were equal to 26.20±11.34, 0.73±0.06, 1.50±0.11 and 121.10±14.05 for Zn, Cd, Cr and Cu, respectively and in water samples for summer season were equal to 27.10±24.72, 0.72±0.05, 1.50±0.16 and 123.80±31.27 for Zn, Cd, Cr and Cu, respectively. Also, the mean concentrations of the evaluated metals compared with WHO and Iran DOE permissible limits showed a significant difference (P<0.05). That is, the mean concentrations of Zn, Cd, Cr and Cu were significantly lower than the permissible limits in both spring and summer seasons. Conclusion: Although the water of Marivan River was not contaminated to heavy metals during the study period. But due to the establishment and development of industrial, urban and agricultural activities along the river and its uncontrolled discharges of wastewater into the river, pollution and decrease of water quality in the near future is not unexpected.