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Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms

Polycyclic aromatic hydrocarbons (PAHs) mainly originate from incomplete combustion of organic substances and are carcinogenic, mutagenic and teratogenetic, posing a high risk to the ecosystem and human health. The remediation of soils contaminated with PAHs has aroused wide public concern. In this...

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Autores principales: He, Yufeng, Hu, Xiaojun, Jiang, Jingxian, Zhang, Jinyang, Liu, Fuwen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8988275/
https://www.ncbi.nlm.nih.gov/pubmed/35424989
http://dx.doi.org/10.1039/d2ra00514j
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author He, Yufeng
Hu, Xiaojun
Jiang, Jingxian
Zhang, Jinyang
Liu, Fuwen
author_facet He, Yufeng
Hu, Xiaojun
Jiang, Jingxian
Zhang, Jinyang
Liu, Fuwen
author_sort He, Yufeng
collection PubMed
description Polycyclic aromatic hydrocarbons (PAHs) mainly originate from incomplete combustion of organic substances and are carcinogenic, mutagenic and teratogenetic, posing a high risk to the ecosystem and human health. The remediation of soils contaminated with PAHs has aroused wide public concern. In this study, hypochlorous acid (HOCl) was applied to realize PAHs removal from industrial contaminated soil with an extremely high degradation efficiency of 93.33% when the initial chlorine concentration was 5000 mg L(−1). The degradation behavior of PAHs by HOCl oxidation was investigated in detail. Parameters including chlorine dosage, pH and temperature that had effects on the degradation process were evaluated systematically. The removal of PAHs was followed well with the pseudo-first-order kinetic model. It is found that HOCl and OH˙ were major contributors to the degradation products of chlorinated and oxygenated PAHs. This research provided an easy-operating and energy-saving way to realize the remediation of PAHs contaminated industrial soil practically with high efficiency.
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spelling pubmed-89882752022-04-13 Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms He, Yufeng Hu, Xiaojun Jiang, Jingxian Zhang, Jinyang Liu, Fuwen RSC Adv Chemistry Polycyclic aromatic hydrocarbons (PAHs) mainly originate from incomplete combustion of organic substances and are carcinogenic, mutagenic and teratogenetic, posing a high risk to the ecosystem and human health. The remediation of soils contaminated with PAHs has aroused wide public concern. In this study, hypochlorous acid (HOCl) was applied to realize PAHs removal from industrial contaminated soil with an extremely high degradation efficiency of 93.33% when the initial chlorine concentration was 5000 mg L(−1). The degradation behavior of PAHs by HOCl oxidation was investigated in detail. Parameters including chlorine dosage, pH and temperature that had effects on the degradation process were evaluated systematically. The removal of PAHs was followed well with the pseudo-first-order kinetic model. It is found that HOCl and OH˙ were major contributors to the degradation products of chlorinated and oxygenated PAHs. This research provided an easy-operating and energy-saving way to realize the remediation of PAHs contaminated industrial soil practically with high efficiency. The Royal Society of Chemistry 2022-04-07 /pmc/articles/PMC8988275/ /pubmed/35424989 http://dx.doi.org/10.1039/d2ra00514j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
He, Yufeng
Hu, Xiaojun
Jiang, Jingxian
Zhang, Jinyang
Liu, Fuwen
Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms
title Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms
title_full Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms
title_fullStr Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms
title_full_unstemmed Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms
title_short Remediation of PAHs contaminated industrial soils by hypochlorous acid: performance and mechanisms
title_sort remediation of pahs contaminated industrial soils by hypochlorous acid: performance and mechanisms
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8988275/
https://www.ncbi.nlm.nih.gov/pubmed/35424989
http://dx.doi.org/10.1039/d2ra00514j
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