Ahmad Khosravi Baqdade; Taher Shahryari; Rasol Khosravi
Abstract
Background and purpose: Today, environmental pollution is a major problem for human life. Dye is one of the most important environment pollutants that is found in the industrial wastewater, especially in the textile industry wastewater. Therefore, the aim of this study was to evaluate the photocatalytic ...
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Background and purpose: Today, environmental pollution is a major problem for human life. Dye is one of the most important environment pollutants that is found in the industrial wastewater, especially in the textile industry wastewater. Therefore, the aim of this study was to evaluate the photocatalytic effect of green iron nanoparticles as catalyst for Reactive red 198 dye degradation in photocatalytic process. Materials and Methods: This study was performed laboratory using a batch reactor under UV A irradiation. In this study, the effect of different variables including pH (3-11), dye concentration (10-100 mg / l), catalyst dosage (0.25-3 g/l) and contact time (2-60 min) were investigated. The characterization of prepared nanoparticles were studied using different techniques such as TEM, FESEM and FTIR analysis. The obtained data were analyzed by Excel software. Results :Also, the photocatalytic tests showed high performance of NPs for dye degradation as catalyst in photocatalytic process. The highest removal efficiency achieved 96.2% at pH 3, catalyst dosage 1.5 g / L, contact time 15 min, and for dye concentration 25 mg / L. Conclusion :Additionally the results show that the photocatalytic process using green iron nanoparticles can be used with a suitable function to removal of reactive red 198 from aqueous solutions.
Mina Mortazavi; Taher Shahryari; Farzaneh Fanaei; Behnam Barikbin
Abstract
Background and purpose: One of the fundamental factors of water quality management plan is being guaranteed the qualitative and quantitative stability of fresh water in water supply systems. Water safety plan is a systematic approach that guarantees the constant supply of drinking water emphasizing the ...
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Background and purpose: One of the fundamental factors of water quality management plan is being guaranteed the qualitative and quantitative stability of fresh water in water supply systems. Water safety plan is a systematic approach that guarantees the constant supply of drinking water emphasizing the prevention of water pollution from catchment to the consumer. Material and methods: WSP-QA TOOL is employed as an instruction in order to assess the safety circumstance and identify vulnerability of water supply system in Torbat Jam; so that the necessary information aligned with WSP approach was provided based on current evidence of water and waste water company and related organization and interviewing experts and then it was analyzed in Excel. Results: The results of this study showed that by obtaining 159 scores of the total score evaluated, only 36.14% of the accordance between the approach in Torbat Jam city water supply system and the approach proposed by the World Health Organization. Among this, the management procedures with 66.67% and the formation of the WSP team with the 10%, has dedicated the highest and lowest amount of the coincided implementation with the plan, respectively. Conclusion: Because of the inadequacy of the conventional water quality control approach, which instead of preventing contamination only detects it, has the potential to cause various contamination in the water supply system, especially through vulnerable system. Therefore, planning to implement and develop a water safety plan as a basic method for reaching the goal of water health.