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Electrochemical Approaches to Sustainable Water Treatment: Tackling Pollution and Advancing Resource Recovery

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: 31 October 2025 | Viewed by 360

Special Issue Editor

Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Interests: electrocatalysis; electroreduction; nitrate reduction; advanced oxidation process; electrochemical water treatment; resource recovery; heavy metal complex removal
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Industrialization and population growth have intensified water pollution, causing a demand for innovative solutions for sustainable water management. Electrochemical technologies, recognized for their efficiency in pollutant removal and resource recovery, are reshaping wastewater treatment paradigms. For the treatment of many environmental pollutants, such as denitrification and dehalogenation, oxygen-containing anions reduction, refractory organics degradation, heavy metal recovery, emerging pollutants removal, high salinity wastewater treatment, and so on, the electrochemical processes like electro-Fenton, electrooxidation, electroreduction, electrocoagulation, and hybrid systems are gaining traction due to their scalability and environmental compatibility. This Special Issue aims to consolidate cutting-edge research on electrochemical advancements, addressing critical challenges in water and wastewater treatment.

Studies on the electrochemical technologies (including electrocoagulation, electrodialysis, electrooxidation, electroreduction, electro-Fenton, etc.) for water and wastewater treatment, resource recovery from wastewater, environmental impact and sustainability, and integration with other treatment processes are welcomed. We invite original research, reviews, and case studies addressing these themes.

Dr. Ran Mao
Guest Editor

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Keywords

  • electrochemical wastewater treatment
  • resource recovery
  • electrooxidation
  • electroreduction
  • heavy metal complexes
  • nitrate
  • phosphorus
  • electro-Fenton
  • PFAS
  • refractory organics
  • high salinity wastewater

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Published Papers (1 paper)

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Research

17 pages, 3264 KiB  
Article
Potential of Textile Wastewater Decolorization Using Cation Exchange Membrane Electrolysis Coupled with Magnesium Salt Precipitation (CEM-MSP)
by Yujing Zhao, Nuo Cheng, Ruihan Jiang, Jian Jiao, Chen Chen, Jiahao Liang, Longfeng Hu, Hesong Wang and Jinlong Wang
Water 2025, 17(12), 1785; https://doi.org/10.3390/w17121785 - 14 Jun 2025
Viewed by 253
Abstract
To overcome the low efficiency, high cost and less environmentally friendly limitations in existing textile wastewater disposal technology, an innovative approach of cation exchange membrane electrolysis coupled with magnesium salt precipitation (CEM-MSP) was implemented. This method simultaneously achieved the high-efficiency adsorption decolorization of [...] Read more.
To overcome the low efficiency, high cost and less environmentally friendly limitations in existing textile wastewater disposal technology, an innovative approach of cation exchange membrane electrolysis coupled with magnesium salt precipitation (CEM-MSP) was implemented. This method simultaneously achieved the high-efficiency adsorption decolorization of dyes and the recovery of lye. The results indicated that cation exchange membrane electrolysis with MgSO4 added to the anode chamber (CEM-EA) exhibited excellent decolorization performance on DB86 dye and achieved low residual Mg2+ concentration. Furthermore, the adsorption mechanism of Mg(OH)2 on DB86 was systematically investigated. The adsorption process fitted with the first-order kinetic, where the adsorption of DB86 by Mg(OH)2 was dominated by electrostatic attraction. Detailed comparison of the four systems demonstrated that CEM-EA was superior to the single magnesium addition method (85.24%) or the stand-alone membrane electrolysis method (10.36%), with 99% decolorization efficiency. In comparison to the cation exchange membrane electrolysis with MgSO4 added to the cathode chamber (CEM-EC), the CEM-EA could diminish the Mg2+ concentration in the effluent to facilitate the lye recovery while guaranteeing the decolorization efficiency. In addition, the DB86 adsorption behavior during the formation of Mg(OH)2 in the cathode chamber was investigated. The Mg(OH)2 particles were relatively dense copper-blue agglomerates with a thin lamellar layer on the surface. Notably, only slight mass contamination was observed on the cation exchange membrane (CEM) surface after multiple cycles. Minor CEM contamination illustrated the stable treatment efficiency of the CEM-EA after several cycles. This study constructed a novel approach integrating membrane electrolysis with magnesium salt precipitation, delivering valuable technical solutions for textile wastewater disposal. Full article
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