SI Yan-xiao,XU Xiao-xuan,HU Jia-shuo.Synergistic Removal of Arsenic by Electrochemical Oxidization and Flocculation System[J].China Water & Wastewater,2021,37(17 17):50-56.
Synergistic Removal of Arsenic by Electrochemical Oxidization and Flocculation System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
17 17
Page:
50-56
Column:
Date of publication:
2021-09-01
- Keywords:
- groundwater with high arsenic concentration; electrochemical oxidization; electrocoagulation; air cathode
- Abstract:
- Aiming at the key problems of high energy consumption of aeration and electrode reaction in traditional electrocoagulation, an electrochemical oxidation-flocculation system composed of air cathode and iron anode was developed for arsenic removal. Arsenic removal efficiency and energy consumption of the new electrochemical oxidation-flocculation system and traditional electrocoagulation system at the same voltage was compared. Current density of air cathode electrocoagulation was much higher than that of traditional electrocoagulation system at the same voltage. When the voltage was 2.0 V, the reaction rate constant of As(Ⅲ) and total arsenic removal in air cathode electrocoagulation was three times of that in aerated electrocoagulation. Compared with aerated electrocoagulation, there was no aeration in air cathode electrocoagulation, which could save 50% energy consumption of electrode reaction and 74% total energy consumption.
Last Update:
2021-09-01