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Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy

Heavy metal cations are a typical type of inorganic pollutant that has persistent distribution characteristics in aquatic environments and are easily adsorbed on carriers, posing serious threats to ecological safety and human health. Some studies have shown that the coexistence of dissolved organic...

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Autores principales: Liang, Weiqian, Wei, Shuyin, Lan, Longxia, Chen, Jinfeng, Zhou, Yingyue, Zhao, Jiawei, Wang, Hao, Gao, Rui, Zeng, Feng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10423972/
https://www.ncbi.nlm.nih.gov/pubmed/37583675
http://dx.doi.org/10.1039/d3ra04189a
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author Liang, Weiqian
Wei, Shuyin
Lan, Longxia
Chen, Jinfeng
Zhou, Yingyue
Zhao, Jiawei
Wang, Hao
Gao, Rui
Zeng, Feng
author_facet Liang, Weiqian
Wei, Shuyin
Lan, Longxia
Chen, Jinfeng
Zhou, Yingyue
Zhao, Jiawei
Wang, Hao
Gao, Rui
Zeng, Feng
author_sort Liang, Weiqian
collection PubMed
description Heavy metal cations are a typical type of inorganic pollutant that has persistent distribution characteristics in aquatic environments and are easily adsorbed on carriers, posing serious threats to ecological safety and human health. Some studies have shown that the coexistence of dissolved organic matter (DOM) and microplastics (MPs) promotes the adsorption of heavy metal cations, but the mechanism of promoting the adsorption process has not been thoroughly studied. In this study, the effect of polystyrene microplastics (PSMPs) on the binding properties of Pb(2+) onto humic acid (HA) in aquatic environments was investigated by spectral analysis and two-dimensional correlation (2D-COS) analysis. When PSMPs co-existed with HA, the adsorption capacity of Pb(2+) increased. On the one hand, Pb(2+) is directly adsorbed on HA through the mechanism of complexation reaction, ion exchange and electrostatic interaction. On the other hand, Pb(2+) is first adsorbed on PSMPs by electrostatic action and indirectly adsorbed on HA in the form of PSMPs–Pb(2+) owing to the interaction between HA and PSMPs, which increases the adsorption amount of Pb(2+) on HA. This study is significant for studying the migration and regression of heavy metal cation contaminants when PSMPs co-exist with DOM in an aqueous environment.
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spelling pubmed-104239722023-08-15 Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy Liang, Weiqian Wei, Shuyin Lan, Longxia Chen, Jinfeng Zhou, Yingyue Zhao, Jiawei Wang, Hao Gao, Rui Zeng, Feng RSC Adv Chemistry Heavy metal cations are a typical type of inorganic pollutant that has persistent distribution characteristics in aquatic environments and are easily adsorbed on carriers, posing serious threats to ecological safety and human health. Some studies have shown that the coexistence of dissolved organic matter (DOM) and microplastics (MPs) promotes the adsorption of heavy metal cations, but the mechanism of promoting the adsorption process has not been thoroughly studied. In this study, the effect of polystyrene microplastics (PSMPs) on the binding properties of Pb(2+) onto humic acid (HA) in aquatic environments was investigated by spectral analysis and two-dimensional correlation (2D-COS) analysis. When PSMPs co-existed with HA, the adsorption capacity of Pb(2+) increased. On the one hand, Pb(2+) is directly adsorbed on HA through the mechanism of complexation reaction, ion exchange and electrostatic interaction. On the other hand, Pb(2+) is first adsorbed on PSMPs by electrostatic action and indirectly adsorbed on HA in the form of PSMPs–Pb(2+) owing to the interaction between HA and PSMPs, which increases the adsorption amount of Pb(2+) on HA. This study is significant for studying the migration and regression of heavy metal cation contaminants when PSMPs co-exist with DOM in an aqueous environment. The Royal Society of Chemistry 2023-08-14 /pmc/articles/PMC10423972/ /pubmed/37583675 http://dx.doi.org/10.1039/d3ra04189a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Liang, Weiqian
Wei, Shuyin
Lan, Longxia
Chen, Jinfeng
Zhou, Yingyue
Zhao, Jiawei
Wang, Hao
Gao, Rui
Zeng, Feng
Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy
title Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy
title_full Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy
title_fullStr Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy
title_full_unstemmed Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy
title_short Effect of microplastics on the binding properties of Pb(ii) onto dissolved organic matter: insights from fluorescence spectra and FTIR combined with two-dimensional correlation spectroscopy
title_sort effect of microplastics on the binding properties of pb(ii) onto dissolved organic matter: insights from fluorescence spectra and ftir combined with two-dimensional correlation spectroscopy
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10423972/
https://www.ncbi.nlm.nih.gov/pubmed/37583675
http://dx.doi.org/10.1039/d3ra04189a
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