Comparing the Electrocoagulation and Electro-Fenton Processes for Removing Nitrate in Aqueous Solution for Fe Electrodes

SeidMohammadi, Abdolmotaleb and Mehralipour, Jamal and Shabanlo, Amir and Roshanaie, Godratollah and Barafrashtepour, Mansour and Asgari, Gorb (2013) Comparing the Electrocoagulation and Electro-Fenton Processes for Removing Nitrate in Aqueous Solution for Fe Electrodes. Journal of Mazandaran University of Medical Sciences, 23 (104). pp. 57-67.

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Official URL: http://jmums.mazums.ac.ir/article-1-2614-en.html

Abstract

Background and purpose: Nitrate contamination in aqueous solution has become an increasingly serious environmental problem. Hence, in this study removal of nitrate in aqueous solution was reviewed using electrocoagulation (EC) and electro-fenton (EF) processes for Fe electrodes. Materials and methods: In the present study, an EC and EF reactor in a lab scale to an approximate volume of 1 liter was proposed for removing of nitrate polluted water which was equipped with four Fe-Fe electrodes with dimensions 200 � 20 � 2 mm. The effects of operating parameters such as initial nitrate concentration, applied voltage (10-30 V), initial pH of the solution (3-12), different initial hydrogen peroxide (for EF process) and reaction times (5-30 minutes) were evaluated. Results: The batch experimental results showed that initial nitrate concentration, initial pH of the solution, different applied voltages, initial H2O2 concentration and reaction times were highly effective on the nitrate removal efficiency in these processes. Based on the results, over 88 of nitrate in optimum condition (pH = 8, applied voltage = 30 V, initial nitrate concentration of 100 mg/l) have been removed in EC process. In addition, the application of EF process can remove 93 of nitrate at pH = 3, applied voltage = 30 V, initial nitrate concentration of 100 mg/l and 5 ml H2O2/l. Conclusion: Both EC and EF technologies can highly remove nitrate in aqueous solution. However, it was found that much better nitrate removal efficiency could be achieved by EF process than by EC process at the same condition.

Item Type: Article
Uncontrolled Keywords: Electrocoagulation, electro-fenton, nitrate, removal
Depositing User: Unnamed user with email eprints@mazums.ac.ir
Date Deposited: 04 Jan 2018 19:14
Last Modified: 04 Jan 2018 19:14
URI: http://eprints.mazums.ac.ir/id/eprint/503

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