Author/Authors :
Dehghani، Mansooreh نويسنده Dehghani, Mansooreh , Hoseini Khameneh، Seyed Mehdi نويسنده Dept. of Orthopedi, Shahid Beheshti University of Medical Sciences, Tehran, Iran Hoseini Khameneh, Seyed Mehdi , Fathi Fath-Aabaadi، Mohammad-Kazem نويسنده Department of Environmental Health Engineering, Student
Research Committee, School of Health, Shiraz University of Medical
Sciences, Shiraz, IR Iran , , Elhamiyan، Zahra نويسنده Department of Environmental Health Engineering, Student
Research Committee, School of Health, Shiraz University of Medical
Sciences, Shiraz, IR Iran , , Shamsedini، Narges نويسنده Research and Development Center, Vice Chancellor of Research Affairs, Shiraz University of Medical Sciences, Shiraz, Iran , , Ghanbarian، Masoud نويسنده Department of Environmental Health Engineering, School of Health, Student Research Committee, Shiraz University of Medical Sciences, Shiraz, IR Iran , , Shahsavani، Samaneh نويسنده Department of Environmental Health Engineering, School of Health, Student Research Committee Shiraz University of Medical Sciences, Shiraz, IR Iran Shahsavani, Samaneh , Nourozian Baghani ، Abbas نويسنده Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, IR Iran ,
Abstract :
High levels of nitrate anion are frequently detected in many groundwater resources in Fars province. The present study aimed to determine the removal efficiency of nitrate from aqueous solutions by electrocoagulation process using aluminum and iron electrodes. A laboratory-scale batch reactor was conducted to determine nitrate removal efficiency using the electrocoagulation method. The removal of nitrate was determined at pH levels of 3, 7, and 11, different voltages (15, 20, and 30 V), and operation times of 30, 60, and 75 min, respectively. Data were analyzed using the SPSS software version 16 (Chicago, Illinois, USA) and Pearson’s correlation coefficient was used to analyze the relationship between the parameters. Results of the present study showed that the removal efficiency was increased from 27% to 86% as pH increased from 3 to 11 at the optimal condition of 30 V and 75 min operation time. Moreover, by increasing the reaction time from 30 V to 75 min the removal efficiency was increased from 63% to 86%, respectively (30 V and pH = 11). Pearson’s correlation analysis showed that there was a significant relationship between removal efficiency and voltage and reaction time as well (P < 0.01). In conclusion, the electrocoagulation process can be used for removing nitrate from water resources because of high efficiency, simplicity, and relatively low cost
