The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation

Biologically formed nano-FeS is a potential and low-cost adsorbent and soil remediation agent. Remediation of arsenic from contaminated groundwater and soil by biological FeS is promising, however, the fate and transport of arsenic associated with nano-FeS in the natural environment are poorly under...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jimei Zhou, Minghui Zhang, Jing Liu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Arsenic mobility Biological nano-FeS particles Arsenic speciation Hydraulic conductivity Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/f70923cea14b4cac904ce50362e69672
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:f70923cea14b4cac904ce50362e69672
record_format	dspace
spelling	oai:doaj.org-article:f70923cea14b4cac904ce50362e696722021-11-18T04:53:28ZThe release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation2666-821110.1016/j.ceja.2021.100190https://doaj.org/article/f70923cea14b4cac904ce50362e696722021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121001058https://doaj.org/toc/2666-8211Biologically formed nano-FeS is a potential and low-cost adsorbent and soil remediation agent. Remediation of arsenic from contaminated groundwater and soil by biological FeS is promising, however, the fate and transport of arsenic associated with nano-FeS in the natural environment are poorly understood. To investigate the fate of adsorbed arsenic on nano-FeS under aerobic conditions, static and dynamic experiments were carried out at different pH values and different oxidants. Batch and column sets showed that arsenic(V)-loaded FeS could release arsenic into solutions at pH 3.0 and 9.0. Especially noteworthy is the release of arsenic sustained at pH 9.0. Introducing Fe3+ and H2O2 at pH 3.0 showed that Fe3+ and a high concentration of H2O2 could reduce the release of arsenic, which might be ascribed to the oxidants promoting secondary Fe mineral phases to form on the arsenic(V)-FeS solid surface. X-ray diffraction patterns indicated that elemental S(0) and arsenic(V)-bearing Fe(II)/Fe(III) minerals formed as the main products. The generated secondary parasymplesite and FeAsO4 were mainly responsible for dissolved arsenic retention. The performance of hydraulic conductivity followed the sequence pH 7.0 > 50 mg/L Fe3+ > 1 mg/L Fe3+ > pH 9.0 > pH 3.0. In addition, H2O2 always kept good hydraulic conductivity. XPS analysis demonstrated that arsenic(III) and arsenic(V) were the main arsenic speciation on the surfaces of the solids, implying that lower valence arsenic was oxidized to arsenic(III/V) during the oxidation processes. The present study facilitates a better understanding of the stability of arsenic-loaded FeS in aerobic environment.Jimei ZhouMinghui ZhangJing LiuElsevierarticleArsenic mobilityBiological nano-FeS particlesArsenic speciationHydraulic conductivityChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100190- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Arsenic mobility Biological nano-FeS particles Arsenic speciation Hydraulic conductivity Chemical engineering TP155-156
spellingShingle	Arsenic mobility Biological nano-FeS particles Arsenic speciation Hydraulic conductivity Chemical engineering TP155-156 Jimei Zhou Minghui Zhang Jing Liu The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation
description	Biologically formed nano-FeS is a potential and low-cost adsorbent and soil remediation agent. Remediation of arsenic from contaminated groundwater and soil by biological FeS is promising, however, the fate and transport of arsenic associated with nano-FeS in the natural environment are poorly understood. To investigate the fate of adsorbed arsenic on nano-FeS under aerobic conditions, static and dynamic experiments were carried out at different pH values and different oxidants. Batch and column sets showed that arsenic(V)-loaded FeS could release arsenic into solutions at pH 3.0 and 9.0. Especially noteworthy is the release of arsenic sustained at pH 9.0. Introducing Fe3+ and H2O2 at pH 3.0 showed that Fe3+ and a high concentration of H2O2 could reduce the release of arsenic, which might be ascribed to the oxidants promoting secondary Fe mineral phases to form on the arsenic(V)-FeS solid surface. X-ray diffraction patterns indicated that elemental S(0) and arsenic(V)-bearing Fe(II)/Fe(III) minerals formed as the main products. The generated secondary parasymplesite and FeAsO4 were mainly responsible for dissolved arsenic retention. The performance of hydraulic conductivity followed the sequence pH 7.0 > 50 mg/L Fe3+ > 1 mg/L Fe3+ > pH 9.0 > pH 3.0. In addition, H2O2 always kept good hydraulic conductivity. XPS analysis demonstrated that arsenic(III) and arsenic(V) were the main arsenic speciation on the surfaces of the solids, implying that lower valence arsenic was oxidized to arsenic(III/V) during the oxidation processes. The present study facilitates a better understanding of the stability of arsenic-loaded FeS in aerobic environment.
format	article
author	Jimei Zhou Minghui Zhang Jing Liu
author_facet	Jimei Zhou Minghui Zhang Jing Liu
author_sort	Jimei Zhou
title	The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation
title_short	The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation
title_full	The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation
title_fullStr	The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation
title_full_unstemmed	The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation
title_sort	release of arsenic from biologically formed arsenic-containing fes under aerobic environment: implications for the stability and species variation of nano-sized iron sulfide in remediation
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/f70923cea14b4cac904ce50362e69672
work_keys_str_mv	AT jimeizhou thereleaseofarsenicfrombiologicallyformedarseniccontainingfesunderaerobicenvironmentimplicationsforthestabilityandspeciesvariationofnanosizedironsulfideinremediation AT minghuizhang thereleaseofarsenicfrombiologicallyformedarseniccontainingfesunderaerobicenvironmentimplicationsforthestabilityandspeciesvariationofnanosizedironsulfideinremediation AT jingliu thereleaseofarsenicfrombiologicallyformedarseniccontainingfesunderaerobicenvironmentimplicationsforthestabilityandspeciesvariationofnanosizedironsulfideinremediation AT jimeizhou releaseofarsenicfrombiologicallyformedarseniccontainingfesunderaerobicenvironmentimplicationsforthestabilityandspeciesvariationofnanosizedironsulfideinremediation AT minghuizhang releaseofarsenicfrombiologicallyformedarseniccontainingfesunderaerobicenvironmentimplicationsforthestabilityandspeciesvariationofnanosizedironsulfideinremediation AT jingliu releaseofarsenicfrombiologicallyformedarseniccontainingfesunderaerobicenvironmentimplicationsforthestabilityandspeciesvariationofnanosizedironsulfideinremediation
_version_	1718424951293214720

The release of arsenic from biologically formed arsenic-containing FeS under aerobic environment: Implications for the stability and species variation of nano-sized iron sulfide in remediation

Ejemplares similares