Review on electrochemical system for landfill leachate treatment: Performance, mechanism, application, shortcoming, and improvement scheme

Yang Deng; Xu Zhu; Nan Chen; Chuanping Feng; Haishuang Wang; Peijing Kuang; Weiwu Hu

doi:10.1016/j.scitotenv.2020.140768

Review on electrochemical system for landfill leachate treatment: Performance, mechanism, application, shortcoming, and improvement scheme

Sci Total Environ. 2020 Nov 25:745:140768. doi: 10.1016/j.scitotenv.2020.140768. Epub 2020 Jul 11.

Authors

Yang Deng¹, Xu Zhu¹, Nan Chen², Chuanping Feng³, Haishuang Wang¹, Peijing Kuang⁴, Weiwu Hu⁵

Affiliations

¹ School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, China.
² School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, China. Electronic address: chennan@cugb.edu.cn.
³ School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, China. Electronic address: fengcp@cugb.edu.cn.
⁴ College of Environment and Resources, Dalian Minzu University, Dalian 116600, China.
⁵ China University of Geosciences (Beijing), Journal Center, Beijing 100083, China.

PMID: 32726696
DOI: 10.1016/j.scitotenv.2020.140768

Abstract

Landfill leachate is a type of complex organic wastewater, which can easily cause serious negative impacts on the human health and ecological environment if disposed improperly. Electrochemical technology provides an efficient approach to effectively reduce the pollutants in landfill leachate. In this review, the electrochemical standalone processes (electrochemical oxidation, electrochemical reduction, electro-coagulation, electro-Fenton process, three-dimensional electrode process, and ion exchange membrane electrochemical process) and the electrochemical integrated processes (electrochemical-advanced oxidation process (AOP) and biological electrochemical process) for landfill leachate treatment are summarized, which include the performance, mechanism, application, existing problems, and improvement schemes such as cost-effectiveness. The main objective of this review is to help researchers understand the characteristics of electrochemical treatment of landfill leachate and to provide a useful reference for the design of the process and reactor for the harmless treatment of landfill leachate.

Keywords: Electrochemical treatments; Integrated processes; Process improvement; Standalone processes; Wastewater treatment.

Publication types

Review