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Advanced Treatment Technologies for Emerging Contaminants in Wastewater

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

Deadline for manuscript submissions: 30 September 2025 | Viewed by 663

Special Issue Editor

College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
Interests: bioelectrochemical systems; electro-fermentation; wastewater treatment; emerging contaminant control; biomass recycling use
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Emerging contaminants (ECs), such as pharmaceuticals, personal care products, microplastics, endocrine-disrupting chemicals, and other trace organic pollutants, represent a growing threat to water quality and ecosystem health. Their persistence, bioaccumulation potential, and adverse effects on organisms have raised concerns among scientists, policymakers, and the public. Traditional wastewater treatment processes often fail to effectively remove these contaminants, necessitating the development of advanced treatment technologies.

Recent progress in materials science, bioengineering, and chemical processes has led to the emergence of innovative treatment methods for ECs, including adsorption, advanced oxidation processes (AOPs), membrane technologies, biological treatments, and hybrid systems. These approaches offer high efficiency and adaptability while contributing to sustainable wastewater management.

This Special Issue invites contributions that explore cutting-edge research and review papers focusing on advanced technologies for the removal of emerging contaminants from wastewater. Topics of interest include, but are not limited to, novel materials, process optimization, the integration of advanced treatment methods with existing systems, pilot- and full-scale studies, and assessments of environmental and economic impacts.

Dr. Xiayuan Wu
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • emerging contaminants
  • advanced treatment technologies
  • adsorption methods
  • advanced oxidation processes (AOPs)
  • membrane filtration
  • hybrid treatment systems
  • bioremediation
  • sustainable water management
  • nanomaterials
  • water quality restoration

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Published Papers (1 paper)

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Research

23 pages, 8047 KiB  
Article
Efficient Chromium(VI) Removal Through In Situ Nano-Iron Sulfide Formation at the Cathode of Microbial Fuel Cells
by Yanyun Guo, Diwen Cao, Shien Tang, Yujing Hu, Weiliang Dong and Xiayuan Wu
Water 2025, 17(14), 2073; https://doi.org/10.3390/w17142073 - 11 Jul 2025
Viewed by 282
Abstract
This study introduces an advanced strategy for improving microbial fuel cell (MFC) performance in hexavalent chromium (Cr(VI)) wastewater treatment. A high-performance nano-iron sulfide (nano-FeS) hybridized biocathode was developed by regulating glucose concentration and applying an external voltage. The combination of a glucose concentration [...] Read more.
This study introduces an advanced strategy for improving microbial fuel cell (MFC) performance in hexavalent chromium (Cr(VI)) wastewater treatment. A high-performance nano-iron sulfide (nano-FeS) hybridized biocathode was developed by regulating glucose concentration and applying an external voltage. The combination of a glucose concentration of 1000 mg/L and a 0.2 V applied voltage greatly promoted the in situ biosynthesis of nano-FeS, resulting in smaller particle sizes and increased quantities within the biocathode, leading to enhanced electrochemical performance. The MFC with the hybridized biocathode exhibited the highest power density (43.45 ± 1.69 mW/m2) and Cr(VI) removal rate (3.99 ± 0.09 mg/L·h), outperforming the control by 29% and 71%, respectively. The improvements were attributed to the following processes. (1) Nano-FeS provided additional active sites that enhanced electron transfer and electrocatalytic activity, reducing cathode passivation; (2) it protected microorganisms by reducing Cr(VI) toxicity, promoting redox-active substance enrichment and antioxidant enzyme secretion, which maintained microbial activity; (3) the biocathode selectively enriched electroactive and Cr(VI)-reducing bacteria (such as Brucella), fostering a stable and symbiotic microbial community. This study highlights the promising potential of regulating carbon source and external voltage to boost nano-FeS biosynthesis, offering a sustainable and efficient strategy for MFC-based Cr(VI) wastewater treatment with practical implications. Full article
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