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The Biogeochemical Behavior and Innovative Remediation of Contaminants

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

Deadline for manuscript submissions: 25 October 2025 | Viewed by 327

Special Issue Editors


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Guest Editor
College of Natural Resources and Environment, Northwest A&F University, Yangling, Xianyang 712100, China
Interests: emerging contaminants; environmental biogeochemical behavior; resource recovery; advanced functional materials; remediation; ecological risk assessment; soil amelioration

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Guest Editor
Department of Ocean Science and Center for Ocean Research in Hong Kong and Macau, The Hong Kong University of Science and Technology, Clear Water Bay, New Territories, Hong Kong 999077, China
Interests: microplastics; plastisphere; dissolved organic matter; ARGs; aggregation; genotoxicity; FT-ICR MS

Special Issue Information

Dear Colleagues,

Pollutants, including pharmaceuticals, heavy metals, microplastics, and industrial chemicals, pose escalating threats to aquatic and soil ecosystems due to their persistence, bioaccumulation potential, and ecotoxicological effects. These contaminants compromise water and soil quality, endanger biodiversity, disrupt ecosystem services, and threaten human health via food chains and drinking water. Despite progress in detection and remediation, critical gaps persist in understanding their environmental fate, synergistic impacts, and scalable mitigation strategies. Therefore, it is necessary to summarize studies on the impacts of pollutants on aquatic and soil ecosystems. This Special Issue of Water calls for papers that address the biogeochemical behavior of contaminants, ecological risk assessments, and innovative remediation strategies including, but not limited to, the following topics:

  • The dynamic transport mechanisms and chemical/biological transformation pathways of contaminants.
  • The impacts of pollutants on organisms, ecosystem functions, and long-term ecological resilience.
  • The design and application of functional materials, microbial consortia, and hybrid systems for contaminant elimination.
  • Risk assessments of pollutants in aquatic and soil ecosystems.

Dr. Zhuozhi Ouyang
Dr. Yanjun Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

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

  • pollutants
  • biogeochemical behavior
  • functional materials
  • remediation
  • risk assessment
  • ecosystems

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Published Papers (1 paper)

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Research

12 pages, 2483 KiB  
Article
Aged Polystyrene Microplastics Accelerate the Photo-Reduction of Chromium(VI)
by Yongkang Cheng, Sainan Qin, Qing Wang, Puxing Zhang and Zhuozhi Ouyang
Water 2025, 17(7), 1102; https://doi.org/10.3390/w17071102 - 7 Apr 2025
Viewed by 235
Abstract
Microplastics (MPs) and hexavalent chromium (Cr(VI)) are typical environmental pollutants, yet their interactions in aquatic systems remain poorly understood. This study investigates the mutual influence between Cr(VI) and both virgin and aged polystyrene microplastics (PS-MPs) under light conditions. Concentration kinetics revealed that the [...] Read more.
Microplastics (MPs) and hexavalent chromium (Cr(VI)) are typical environmental pollutants, yet their interactions in aquatic systems remain poorly understood. This study investigates the mutual influence between Cr(VI) and both virgin and aged polystyrene microplastics (PS-MPs) under light conditions. Concentration kinetics revealed that the total chromium concentration remained stable across all systems, while Cr(VI) concentrations decreased over time, indicating that PS-MPs accelerate the reduction of Cr(VI) to Cr(III). Conversely, it had been found that Cr(VI) promoted the aging of PS-MPs, and this was evidenced by an increase in surface roughness and the generation of oxygen-containing functional groups. Cr(VI) led to a rise in the O/C ratio and carbonyl index, providing additional evidence for the aging of PS. Two-dimensional correlation spectroscopy (2D-COS) elucidated that under Cr(VI) exposure, the order of functional group alterations in PS and aged PS exhibited an opposite trend. Additionally, three-dimensional fluorescence spectroscopy revealed distinct changes in the fluorescence characteristics of leached substances from aged and pristine PS, both with and without Cr(VI), under light and dark conditions. These results furnish innovative understandings of environmental behavior and risks associated with the co-occurrence of MPs and heavy metals, highlighting the complex interplay between Cr(VI) and PS-MPs in aquatic environments. Full article
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