首页|Recent advances on decomplexation mechanisms of heavy metal complexes in persulfate-based advanced oxidation processes

Recent advances on decomplexation mechanisms of heavy metal complexes in persulfate-based advanced oxidation processes

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In some industrial wastewater,heavy metals combine with organic complexing agents to form heavy metal complexes(HMCs).These HMCs can be difficult to decompose and remove through conventional techniques due to their higher stability than free heavy metal ions.In recent years,persulfate based ad-vanced oxidation processes(PS-based AOPs)have been recognized as a viable technique for HMCs degra-dation.Nevertheless,a comprehensive and in-depth understanding of the relevant HMCs decomplexation mechanisms in PS-based AOPs is still lacking.This review delineates the current progress of HMCs de-complexation in PS-based AOPs.We discuss the distinctions between the two widely used oxidant types in PS-based AOPs techniques.Moreover,we summarize and highlight the decomplexation mechanisms based on electron and energy transfer,and degradation pathways of HMCs.We also emphasize the ef-fects of environmental water constituents,namely pH,inorganic ions,and natural organic matter(NOM),on HMCs decomplexation.Ultimately,we identify the existing challenges and perspectives that will steer the direction of advancing PS-based AOPs to remove HMCs.

Heavy metal complexesPersulfateAdvanced oxidation processesDecomplexation mechanismsElectron and energy transfer

Shili Wang、Mamitiana Roger Razanajatovo、Xuedong Du、Shunli Wan、Xin He、Qiuming Peng、Qingrui Zhang

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State Key Laboratory of Metastable Materials Science and Technology,Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse,Yanshan University,Qinhuangdao 066004,China

College of Life & Environment Sciences,Huangshan University,Huangshan 245041,China

Hebei Key Laboratory of Agroecological Safetye Key Laboratory,Hebei University of Environmental Engineering,Qinhuangdao 066102,China

National Natural science Foundation of ChinaNational Natural science Foundation of ChinaNatural Science Foundation of Hebei ProvinceNatural Science Foundation of Hebei ProvinceHebei Industrial Innovation and Entrepreneurship team

U22A2040322006047E2021203140B2021203016215A7608D

2024

10.1016/j.cclet.2023.109140

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(6)
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