A comprehensive review on iron‒carbon microelectrolysis constructed wetlands: Efficiency, mechanism and prospects

Yongqiang Wang; Linlin Li; Xiaochun Guo; Aiwen Wang; Yunhao Pan; Jun Ma; Shaoyong Lu; Dongmei Liu

doi:10.1016/j.watres.2024.122648

A comprehensive review on iron‒carbon microelectrolysis constructed wetlands: Efficiency, mechanism and prospects

Water Res. 2024 Oct 16;268(Pt A):122648. doi: 10.1016/j.watres.2024.122648. Online ahead of print.

Authors

Yongqiang Wang¹, Linlin Li², Xiaochun Guo², Aiwen Wang³, Yunhao Pan³, Jun Ma³, Shaoyong Lu⁴, Dongmei Liu⁵

Affiliations

¹ State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory for Lake Pollution Control, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: [email protected].
² State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory for Lake Pollution Control, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
³ State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China.
⁴ State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory for Lake Pollution Control, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: [email protected].
⁵ State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: [email protected].

PMID: 39461209
DOI: 10.1016/j.watres.2024.122648

Abstract

The traditional constructed wetlands (CWs) face challenges such as significant seasonal fluctuations in decontamination performance and susceptibility to clogging, with the bottlenecks in advanced wastewater treatment becoming increasingly prominent. The iron‒carbon microelectrolysis coupled with constructed wetlands (ICME‒CWs) represents a promising new type of CWs, capable of removing typical and emerging pollutants in water through various mechanisms including adsorption, precipitation, oxidation‒reduction, microelectrolysis, and plant‒microbial synergy. Therefore, this review summarizes the sources, preparation, and basic properties of the ICME substrate commonly used in ICME‒CWs in recent years. It systematically outlines the decontamination mechanisms of ICME‒CWs and their removal performance for pollutants. Additionally, the potential ecological effects of ICME on wetland organisms (microorganisms and plants) are discussed. Finally, the prospects and challenges of ICME‒CWs in applications such as greenhouse gas reduction, groundwater remediation, and the removal of emerging pollutants are proposed. This review aims to advance the development of ICME‒CWs technology for efficient wastewater treatment and provide prospects and guidance for the sustainable and environmentally friendly development of CWs.

Keywords: Constructed wetlands; Ecological effects; Iron‒carbon microelectrolysis; Pollutants removal.

Publication types

Review