Evaluating the Performance of Reverse Osmosis in Arsenic Removal from Water

Document Type : Research Paper


1 MSc, Chemical Engineering, Sistan & Balochestan University, Zahedan

2 Faculty Member, Department of Chemical Engineering, Razi University of Kermanshah

3 Faculty Member, Department of Chemical Engineering, Sistan & Balochestan University, Zahedan


Arsenic exists in compounds present in the Earth's crust in various concentrations. High concentrations of arsenic in drinking water may cause skin and lung cancers or other diseases. Unfortunately, in some urban and rural areas inKurdistanProvince(e.g., Delbaran), arsenic concentrations of above 70 ppb are observed in groundwater resources, which is higher than EPA standards. The objective of this study was to evaluate the effects of using membranes for arsenic removal from drinking water. To study the practical effects of different membranes on arsenic removal, five types of membranes, namely, PVD, TFC-SR, FT30, TFC-ULP, and BW30, were used. Based on the two parameters of effluent flux and arsenic removal efficiency (which was above %95), TFC-SR was selected as the best membrane. Atmospheric pressure, temperature, and pH were the parameters tested for this membrane to obtain an optimum atmospheric pressure of 10 bars and an optimum pH level of 7.57. Results also showed that higher temperatures increased both the effluent flux and arsenic removal.


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