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Advanced Oxidation Processes (AOPs) in Treating Organic Pollutants

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Green Chemistry".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 438

Special Issue Editors


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Guest Editor
College of Architecture and Environment, Sichuan University, Chengdu 610065, China
Interests: advanced oxidation processes; emerging contaminants; catalytic ozonation; electrochemical oxidation
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
Interests: advanced oxidation processes; membrane water treatment; preparation and application of advanced nanomaterials
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Special Issue Information

Dear Colleagues,

Advanced oxidation processes (AOPs) are crucial in modern environmental chemistry for addressing organic pollutants. These processes generate highly reactive compounds, like hydroxyl radicals, that degrade a wide range of contaminants. Key AOPs include methods such as Fenton's reaction, photocatalysis, and ozonation, as well as the use of advanced nanomaterials. These methods are essential for treating both persistent and emerging pollutants in water and wastewater.

This Special Issue of Molecules aims to collect cutting-edge research and comprehensive reviews on the latest advancements in AOPs. We invite contributions exploring innovative methodologies, novel catalytic materials, and optimization strategies to enhance the efficiency and selectivity of AOPs. Studies on the mechanistic understanding of degradation pathways, intermediate product identification, and toxicity reduction are particularly welcome, providing insights into the holistic impact of AOPs on environmental health and sustainability.

Dr. Zhaokun Xiong
Dr. Zhiqiang Sun
Guest Editors

Manuscript Submission Information

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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. Molecules 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 2700 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

  • advanced oxidation processes (AOPs)
  • organic pollutants
  • hydroxyl radicals
  • ozonation
  • Fenton
  • persulfate
  • water and wastewater treatment
  • degradation pathways

Published Papers (1 paper)

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Research

20 pages, 14575 KiB  
Article
Activation of Peroxymonosulfate by Co-Ni-Mo Sulfides/CNT for Organic Pollutant Degradation
by Shihao You, Jing Di, Tao Zhang, Yufeng Chen, Ruiqin Yang, Yesong Gao, Yin Li and Xikun Gai
Molecules 2024, 29(15), 3633; https://doi.org/10.3390/molecules29153633 - 31 Jul 2024
Viewed by 357
Abstract
To explore advanced oxidation catalysts, peroxymonosulfate (PMS) activation by Co-Ni-Mo/carbon nanotube (CNT) composite catalysts was investigated. A compound of NiCo2S4, MoS2, and CNTs was successfully prepared using a simple one-pot hydrothermal method. The results revealed that the [...] Read more.
To explore advanced oxidation catalysts, peroxymonosulfate (PMS) activation by Co-Ni-Mo/carbon nanotube (CNT) composite catalysts was investigated. A compound of NiCo2S4, MoS2, and CNTs was successfully prepared using a simple one-pot hydrothermal method. The results revealed that the activation of PMS by Co-Ni-Mo/CNT yielded an exceptional Rhodamine B decolorization efficiency of 99% within 20 min for the Rhodamine B solution. The degradation rate of Co-Ni-Mo/CNT was 4.5 times higher than that of Ni-Mo/CNT or Co-Mo/CNT, and 1.9 times as much than that of Co-Ni/CNT. Additionally, radical quenching experiments revealed that the principal active groups were 1O2, surface-bound SO4•−, and •OH radicals. Furthermore, the catalyst exhibited low metal ion leaching and favorable stability. Mechanism studies revealed that Mo4+ on the surface of MoS2 participated in the oxidation of PMS and the transformation of Co3+/Co2+ and Ni3+/Ni2+. The synergism between MoS2 and NiCo2S4 reduces the charge transfer resistance between the catalyst and solution interface, thus accelerating the reaction rate. Interconnected structures composed of metal sulfides and CNTs can also enhance the electron transfer process and afford sufficient active reaction sites. Our work provides a further understanding of the design of multi-metal sulfides for wastewater treatment. Full article
(This article belongs to the Special Issue Advanced Oxidation Processes (AOPs) in Treating Organic Pollutants)
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