Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area

Supergene geochemical processes (SGPs) occur ubiquitously in the Earth´s surface, but their effects on the fate and bioavailability of polycyclic aromatic hydrocarbons (PAHs) in soil remain unclear. Study selected phenanthrene and pyrene as representative PAHs and yellow soil (YS) and limestone soil...

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Autores principales:	An Xianjin, Li Wei, Di Xinyue, Xiao Baohua
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	supergene geochemical processes soil karst pahs desorption bioavailability Environmental pollution TD172-193.5 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/d0c2d693535148aa914cb64db2e85445
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spelling	oai:doaj.org-article:d0c2d693535148aa914cb64db2e854452021-11-04T15:51:57ZEffects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area2639-594010.1080/26395940.2021.1990799https://doaj.org/article/d0c2d693535148aa914cb64db2e854452021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/26395940.2021.1990799https://doaj.org/toc/2639-5940Supergene geochemical processes (SGPs) occur ubiquitously in the Earth´s surface, but their effects on the fate and bioavailability of polycyclic aromatic hydrocarbons (PAHs) in soil remain unclear. Study selected phenanthrene and pyrene as representative PAHs and yellow soil (YS) and limestone soil (LS) of karst area in southwest China, to investigate the effects of SGPs on the desorption and bioavailability of PAHs. Two soils were subjected to repeated freeze-thawing and long-term storage for SGPs. The hysteresis index values of pollutants increased with increase cycles of freeze-thawing and storage time. Under the SGPs, the phenanthrene fast desorption fraction of YS and LS decreased by 22.01% and 24.79%, respectively, and that of pyrene were by 23.81% and 28.12%, respectively. The desorption fraction of 24 hours was a better proxy of the fraction of bioavailability than that of 6 hours. The desorption rate of PAHs was negatively correlated with the hydrophobicity of PAHs.An XianjinLi WeiDi XinyueXiao BaohuaTaylor & Francis Grouparticlesupergene geochemical processessoilkarstpahsdesorptionbioavailabilityEnvironmental pollutionTD172-193.5Environmental sciencesGE1-350ENEnvironmental Pollutants & Bioavailability, Vol 33, Iss 1, Pp 402-414 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	supergene geochemical processes soil karst pahs desorption bioavailability Environmental pollution TD172-193.5 Environmental sciences GE1-350
spellingShingle	supergene geochemical processes soil karst pahs desorption bioavailability Environmental pollution TD172-193.5 Environmental sciences GE1-350 An Xianjin Li Wei Di Xinyue Xiao Baohua Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area
description	Supergene geochemical processes (SGPs) occur ubiquitously in the Earth´s surface, but their effects on the fate and bioavailability of polycyclic aromatic hydrocarbons (PAHs) in soil remain unclear. Study selected phenanthrene and pyrene as representative PAHs and yellow soil (YS) and limestone soil (LS) of karst area in southwest China, to investigate the effects of SGPs on the desorption and bioavailability of PAHs. Two soils were subjected to repeated freeze-thawing and long-term storage for SGPs. The hysteresis index values of pollutants increased with increase cycles of freeze-thawing and storage time. Under the SGPs, the phenanthrene fast desorption fraction of YS and LS decreased by 22.01% and 24.79%, respectively, and that of pyrene were by 23.81% and 28.12%, respectively. The desorption fraction of 24 hours was a better proxy of the fraction of bioavailability than that of 6 hours. The desorption rate of PAHs was negatively correlated with the hydrophobicity of PAHs.
format	article
author	An Xianjin Li Wei Di Xinyue Xiao Baohua
author_facet	An Xianjin Li Wei Di Xinyue Xiao Baohua
author_sort	An Xianjin
title	Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area
title_short	Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area
title_full	Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area
title_fullStr	Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area
title_full_unstemmed	Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area
title_sort	effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/d0c2d693535148aa914cb64db2e85445
work_keys_str_mv	AT anxianjin effectsofsupergenegeochemicalprocessesondesorptionandbioavailabilityofpolycyclicaromatichydrocarbonsinsoilofkarstarea AT liwei effectsofsupergenegeochemicalprocessesondesorptionandbioavailabilityofpolycyclicaromatichydrocarbonsinsoilofkarstarea AT dixinyue effectsofsupergenegeochemicalprocessesondesorptionandbioavailabilityofpolycyclicaromatichydrocarbonsinsoilofkarstarea AT xiaobaohua effectsofsupergenegeochemicalprocessesondesorptionandbioavailabilityofpolycyclicaromatichydrocarbonsinsoilofkarstarea
_version_	1718444678674644992

Effects of supergene geochemical processes on desorption and bioavailability of polycyclic aromatic hydrocarbons in soil of karst area

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