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Advanced Oxidation Processes and Biodegradation for Emerging Contaminants Treatment: 2nd Edition

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Physical Chemistry and Chemical Physics".

Deadline for manuscript submissions: 30 March 2026 | Viewed by 459

Special Issue Editor

Special Issue Information

Dear Colleagues,

Since the industrial revolution, persistent organic compounds in wastewater have become the core object of water pollution control due to their complexity, stability, and high toxicity. The treatment of emerging contaminants, including persistent organic pollutants, antibiotics, and environmentally disruptive chemicals, in water/wastewater is still a challenge. Numerous methods have been adopted for emerging contaminants in water/wastewater treatment. However, the toxicity of intermediate products formed during emerging contaminants treatment is still unknown, which is a barrier for actual application. In this Special Issue of the International Journal of Molecular Sciences, we aim to publish high-quality research articles and reviews on the understanding of advanced oxidation processes and biodegradation for the treatment of emerging contaminants, especially for their toxicity assessment.

Dr. Chengdu Qi
Guest Editor

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Keywords

  • advanced oxidation processes
  • persistent organic compounds
  • water pollution control
  • biodegradation
  • emerging contaminants
  • water treatment
  • wastewater treatment
  • toxicity assessment

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Published Papers (1 paper)

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Research

17 pages, 2046 KB  
Article
Iron-Based Biochar for Efficient Persulfate Activation and Sulfamethoxazole Degradation
by Ying Lu, Chengdu Qi, Guilong Peng, Yi Gao and Ronglong Zhang
Int. J. Mol. Sci. 2025, 26(20), 9971; https://doi.org/10.3390/ijms26209971 - 14 Oct 2025
Viewed by 381
Abstract
In this study, we investigated the performance of iron-loaded biochar (Fe-BC) derived from mulberry branches in activating persulfate (PS) for the efficient degradation of sulfamethoxazole (SMX). The Fe-BC/PS system exhibited superior catalytic activity towards SMX degradation, achieving 97% removal within 60 min. The [...] Read more.
In this study, we investigated the performance of iron-loaded biochar (Fe-BC) derived from mulberry branches in activating persulfate (PS) for the efficient degradation of sulfamethoxazole (SMX). The Fe-BC/PS system exhibited superior catalytic activity towards SMX degradation, achieving 97% removal within 60 min. The degradation efficiency was found to be highly dependent on preparation conditions, including calcination temperature, the type of iron salt, and biomass feedstock. Reactive species such as hydroxyl radicals (OH), sulfate radicals (SO4•−), and iron (IV) (Fe(IV)) were identified as key contributors to SMX degradation, with Fe(IV) playing a dominant role. The influence of water quality parameters, such as inorganic ions, pH, and natural organic matter (NOM), on the degradation of SMX was also examined. Proposed degradation pathways revealed the stepwise oxidation of SMX into smaller intermediates, ultimately leading to mineralization. Our findings highlight the potential of Fe-BC/PS systems as a sustainable and effective approach for the remediation of sulfonamide antibiotics in aquatic environments. Full article
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