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...
Autores principales: | , , , , , , |
---|---|
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 |