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The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil

Soil composition can influence the chemical forms and bioavailability of soil mercury (Hg). However, previous studies have predominantly focused on the influence of individual components on the biogeochemical behavior of soil Hg, while the influence of various component interactions among several in...

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Autores principales: Qin, Aming, Ran, Shu, He, Tianrong, Yin, Deliang, Xu, Yiyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10674802/
https://www.ncbi.nlm.nih.gov/pubmed/37999594
http://dx.doi.org/10.3390/toxics11110942
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author Qin, Aming
Ran, Shu
He, Tianrong
Yin, Deliang
Xu, Yiyuan
author_facet Qin, Aming
Ran, Shu
He, Tianrong
Yin, Deliang
Xu, Yiyuan
author_sort Qin, Aming
collection PubMed
description Soil composition can influence the chemical forms and bioavailability of soil mercury (Hg). However, previous studies have predominantly focused on the influence of individual components on the biogeochemical behavior of soil Hg, while the influence of various component interactions among several individual factors remain unclear. In this study, artificial soil was prepared by precisely regulating its components, and a controlled potted experiment was conducted to investigate the influence of various organic and inorganic constituents, as well as different soil textures resulting from their coupling, on soil Hg methylation and its bioavailability. Our findings show that inorganic components in the soils primarily exhibit adsorption and fixation effects on Hg, thereby reducing the accumulation of total mercury (THg) and methylmercury (MeHg) in plants. It is noteworthy that iron sulfide simultaneously resulted in an increase in soil MeHg concentration (277%). Concentrations of THg and MeHg in soil with peat were lower in rice but greater in spinach. A correlation analysis indicated that the size of soil particles was a crucial factor affecting the accumulation of Hg in plants. Consequently, even though fulvic acid activated soil Hg, it significantly increased the proportion of soil particles smaller than 100.8 μm, thus inhibiting the accumulation of Hg in plants, particularly reducing the concentration of THg (93%) and MeHg (85%) in water spinach. These results demonstrate that the interaction of organic and inorganic components can influence the biogeochemical behavior of soil Hg not only through their chemical properties, but also by altering the soil texture.
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spelling pubmed-106748022023-11-20 The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil Qin, Aming Ran, Shu He, Tianrong Yin, Deliang Xu, Yiyuan Toxics Article Soil composition can influence the chemical forms and bioavailability of soil mercury (Hg). However, previous studies have predominantly focused on the influence of individual components on the biogeochemical behavior of soil Hg, while the influence of various component interactions among several individual factors remain unclear. In this study, artificial soil was prepared by precisely regulating its components, and a controlled potted experiment was conducted to investigate the influence of various organic and inorganic constituents, as well as different soil textures resulting from their coupling, on soil Hg methylation and its bioavailability. Our findings show that inorganic components in the soils primarily exhibit adsorption and fixation effects on Hg, thereby reducing the accumulation of total mercury (THg) and methylmercury (MeHg) in plants. It is noteworthy that iron sulfide simultaneously resulted in an increase in soil MeHg concentration (277%). Concentrations of THg and MeHg in soil with peat were lower in rice but greater in spinach. A correlation analysis indicated that the size of soil particles was a crucial factor affecting the accumulation of Hg in plants. Consequently, even though fulvic acid activated soil Hg, it significantly increased the proportion of soil particles smaller than 100.8 μm, thus inhibiting the accumulation of Hg in plants, particularly reducing the concentration of THg (93%) and MeHg (85%) in water spinach. These results demonstrate that the interaction of organic and inorganic components can influence the biogeochemical behavior of soil Hg not only through their chemical properties, but also by altering the soil texture. MDPI 2023-11-20 /pmc/articles/PMC10674802/ /pubmed/37999594 http://dx.doi.org/10.3390/toxics11110942 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
Qin, Aming
Ran, Shu
He, Tianrong
Yin, Deliang
Xu, Yiyuan
The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil
title The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil
title_full The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil
title_fullStr The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil
title_full_unstemmed The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil
title_short The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil
title_sort effects of different soil component couplings on the methylation and bioavailability of mercury in soil
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10674802/
https://www.ncbi.nlm.nih.gov/pubmed/37999594
http://dx.doi.org/10.3390/toxics11110942
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