|
|||||
|
|
An electrochemical process intensified by bipolar iron particles for nitrate removal from synthetic groundwater |
|
| Authors: | Weiwei Huang Baogang Zhang Miao Li Nan Chen Chuanping Feng Zhenya Zhang |
| Institution: | 1. Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences, Beijing), Ministry of Education, No. 29 Xueyuan Road, Haidian District, Beijing, 100083, China 2. School of Water Resource and Environment, China University of Geosciences, Beijing, China 3. School of Environment, Tsinghua University, Beijing, 100084, China 4. Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 3058572, Japan |
| Abstract: | An intensified electrochemical process in an undivided cell using Cu–Zn alloy as cathode and Ti/IrO2–Pt as anode combined with bipolar iron particles (electro-iron system) has been developed. The performance of nitrate reduction was evaluated using synthetic groundwater. Results showed that the nitrate-N dropped rapidly from 50 to less than 10 mg/L within 100 min in the developed system at current densities in the range of 5–30 mA/cm2. Sodium chloride addition was found to have a positive effect on the system performance. No nitrite-N was detected during the electrolysis in the presence of sodium chloride. The concentration of total iron ion in the solutions was found to be less than 0.25 mg/L after 100 min electrolysis. Furthermore, the electrical energy consumption for nitrate reduction in the electro-iron system was saved by approximately 29.4–34.8 % at 5–30 mA/cm2. The developed system has been proved to promote electrochemical nitrate reduction and greatly improve the electrical energy efficiency. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |