Cargando…

Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms

Organochlorine pesticides (OCPs) were typical persistent organic pollutants that posed great hazards and high risks in soil. In this study, a peanut shell biochar-loaded nano zero-valent iron (BC/nZVI) material was prepared in combination with soil indigenous microorganisms to enhance the degradatio...

Descripción completa

Detalles Bibliográficos
Autores principales: Li, Qun, Zhang, Lei, Wan, Jinzhong, Fan, Tingting, Deng, Shaopo, Zhou, Yan, He, Yue
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10002398/
https://www.ncbi.nlm.nih.gov/pubmed/36901323
http://dx.doi.org/10.3390/ijerph20054314
_version_ 1784904380715106304
author Li, Qun
Zhang, Lei
Wan, Jinzhong
Fan, Tingting
Deng, Shaopo
Zhou, Yan
He, Yue
author_facet Li, Qun
Zhang, Lei
Wan, Jinzhong
Fan, Tingting
Deng, Shaopo
Zhou, Yan
He, Yue
author_sort Li, Qun
collection PubMed
description Organochlorine pesticides (OCPs) were typical persistent organic pollutants that posed great hazards and high risks in soil. In this study, a peanut shell biochar-loaded nano zero-valent iron (BC/nZVI) material was prepared in combination with soil indigenous microorganisms to enhance the degradation of α-hexachlorocyclohexane(α-HCH) and γ-hexachlorocyclohexane(γ-HCH) in water and soil. The effects of BC/nZVI on indigenous microorganisms in soil were investigated based on the changes in redox potential and dehydrogenase activity in the soil. The results showed as follows: (1) The specific surface area of peanut shell biochar loaded with nano-zero-valent iron was large, and the nano-zero-valent iron particles were evenly distributed on the peanut shell biochar; (2) peanut shell BC/nZVI had a good degradation effect on α-HCH and γ-HCH in water, with degradation rates of 64.18% for α-HCH and 91.87% for γ-HCH in 24 h; (3) peanut shell BC/nZVI also had a good degradation effect on α-HCH and γ-HCH in soil, and the degradation rates of α-HCH and γ-HCH in the 1% BC/nZVI reached 55.2% and 85.4%, second only to 1% zero-valent iron. The degradation rate was the fastest from 0 to 7 days, while the soil oxidation-reduction potential (ORP) increased sharply. (4) The addition of BC/nZVI to the soil resulted in a significant increase in dehydrogenase activity, which further promoted the degradation of HCHs; the amount of HCHs degradation was significantly negatively correlated with dehydrogenase activity. This study provides a remediation strategy for HCH-contaminated sites, reducing the human health risk of HCHs in the soil while helping to improve the soil and increase the activity of soil microorganisms.
format Online
Article
Text
id pubmed-10002398
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-100023982023-03-11 Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms Li, Qun Zhang, Lei Wan, Jinzhong Fan, Tingting Deng, Shaopo Zhou, Yan He, Yue Int J Environ Res Public Health Article Organochlorine pesticides (OCPs) were typical persistent organic pollutants that posed great hazards and high risks in soil. In this study, a peanut shell biochar-loaded nano zero-valent iron (BC/nZVI) material was prepared in combination with soil indigenous microorganisms to enhance the degradation of α-hexachlorocyclohexane(α-HCH) and γ-hexachlorocyclohexane(γ-HCH) in water and soil. The effects of BC/nZVI on indigenous microorganisms in soil were investigated based on the changes in redox potential and dehydrogenase activity in the soil. The results showed as follows: (1) The specific surface area of peanut shell biochar loaded with nano-zero-valent iron was large, and the nano-zero-valent iron particles were evenly distributed on the peanut shell biochar; (2) peanut shell BC/nZVI had a good degradation effect on α-HCH and γ-HCH in water, with degradation rates of 64.18% for α-HCH and 91.87% for γ-HCH in 24 h; (3) peanut shell BC/nZVI also had a good degradation effect on α-HCH and γ-HCH in soil, and the degradation rates of α-HCH and γ-HCH in the 1% BC/nZVI reached 55.2% and 85.4%, second only to 1% zero-valent iron. The degradation rate was the fastest from 0 to 7 days, while the soil oxidation-reduction potential (ORP) increased sharply. (4) The addition of BC/nZVI to the soil resulted in a significant increase in dehydrogenase activity, which further promoted the degradation of HCHs; the amount of HCHs degradation was significantly negatively correlated with dehydrogenase activity. This study provides a remediation strategy for HCH-contaminated sites, reducing the human health risk of HCHs in the soil while helping to improve the soil and increase the activity of soil microorganisms. MDPI 2023-02-28 /pmc/articles/PMC10002398/ /pubmed/36901323 http://dx.doi.org/10.3390/ijerph20054314 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Qun
Zhang, Lei
Wan, Jinzhong
Fan, Tingting
Deng, Shaopo
Zhou, Yan
He, Yue
Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms
title Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms
title_full Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms
title_fullStr Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms
title_full_unstemmed Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms
title_short Analysis of the Degradation of OCPs Contaminated Soil by the BC/nZVI Combined with Indigenous Microorganisms
title_sort analysis of the degradation of ocps contaminated soil by the bc/nzvi combined with indigenous microorganisms
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10002398/
https://www.ncbi.nlm.nih.gov/pubmed/36901323
http://dx.doi.org/10.3390/ijerph20054314
work_keys_str_mv AT liqun analysisofthedegradationofocpscontaminatedsoilbythebcnzvicombinedwithindigenousmicroorganisms
AT zhanglei analysisofthedegradationofocpscontaminatedsoilbythebcnzvicombinedwithindigenousmicroorganisms
AT wanjinzhong analysisofthedegradationofocpscontaminatedsoilbythebcnzvicombinedwithindigenousmicroorganisms
AT fantingting analysisofthedegradationofocpscontaminatedsoilbythebcnzvicombinedwithindigenousmicroorganisms
AT dengshaopo analysisofthedegradationofocpscontaminatedsoilbythebcnzvicombinedwithindigenousmicroorganisms
AT zhouyan analysisofthedegradationofocpscontaminatedsoilbythebcnzvicombinedwithindigenousmicroorganisms
AT heyue analysisofthedegradationofocpscontaminatedsoilbythebcnzvicombinedwithindigenousmicroorganisms