Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials

During sediment remediation, adsorbent addition is an effective technology for the removal of contaminants but the cost is often high. In this study, a low-cost adsorbent, ceramsite, made from contaminated riverbed sediment was synthesized. The Fe-modified ceramsite (FMC) was used as adsorbent to re...

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Autores principales:	Yue Yin, Gaoyang Xu, Linlin Li, Chunlei Qiao, Yihua Xiao, Tao Ma, Changqing Liu
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	fe-modified ceramsite inorganic arsenic sediment remediation Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/90d1cd1cb1d443dda31666d565383501
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id	oai:doaj.org-article:90d1cd1cb1d443dda31666d565383501
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spelling	oai:doaj.org-article:90d1cd1cb1d443dda31666d5653835012021-11-06T10:54:02ZRemoval of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials0273-12231996-973210.2166/wst.2021.076https://doaj.org/article/90d1cd1cb1d443dda31666d5653835012021-04-01T00:00:00Zhttp://wst.iwaponline.com/content/83/7/1522https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732During sediment remediation, adsorbent addition is an effective technology for the removal of contaminants but the cost is often high. In this study, a low-cost adsorbent, ceramsite, made from contaminated riverbed sediment was synthesized. The Fe-modified ceramsite (FMC) was used as adsorbent to remove arsenate from aqueous solutions and reduce the inorganic arsenic release from contaminated sediments. Kinetic studies showed that chemisorption mainly governed the adsorption process while batch studies yielded the theoretical adsorption capacity for arsenate of 10.63 mg/g at pH = 7 condition. Co-existing anions and pH have no significant impact on the adsorption process. In the regeneration studies, 91, 86, and 80% of the adsorption capacity were recovered in 3 cycles. In-situ remediation trials revealed that the addition of the adsorbent to sediment surface significantly reduced the release of inorganic arsenic into aqueous system, with a reduction efficiency of 86%. Furthermore, the species of the arsenic in the surface layer was significantly inactivated from an active state to a stable state. These findings highlight the application of the FMC as a facile and cost-effective adsorbent for containment of arsenic in solutions and sediments, demonstrating that they are highly applicable for practical cases. HIGHLIGHTS Contaminated sediment was used as the support for the iron oxides.; FMC was used as an adsorbent and remediator.;Yue YinGaoyang XuLinlin LiChunlei QiaoYihua XiaoTao MaChangqing LiuIWA Publishingarticlefe-modified ceramsiteinorganic arsenicsediment remediationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 7, Pp 1522-1534 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fe-modified ceramsite inorganic arsenic sediment remediation Environmental technology. Sanitary engineering TD1-1066
spellingShingle	fe-modified ceramsite inorganic arsenic sediment remediation Environmental technology. Sanitary engineering TD1-1066 Yue Yin Gaoyang Xu Linlin Li Chunlei Qiao Yihua Xiao Tao Ma Changqing Liu Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials
description	During sediment remediation, adsorbent addition is an effective technology for the removal of contaminants but the cost is often high. In this study, a low-cost adsorbent, ceramsite, made from contaminated riverbed sediment was synthesized. The Fe-modified ceramsite (FMC) was used as adsorbent to remove arsenate from aqueous solutions and reduce the inorganic arsenic release from contaminated sediments. Kinetic studies showed that chemisorption mainly governed the adsorption process while batch studies yielded the theoretical adsorption capacity for arsenate of 10.63 mg/g at pH = 7 condition. Co-existing anions and pH have no significant impact on the adsorption process. In the regeneration studies, 91, 86, and 80% of the adsorption capacity were recovered in 3 cycles. In-situ remediation trials revealed that the addition of the adsorbent to sediment surface significantly reduced the release of inorganic arsenic into aqueous system, with a reduction efficiency of 86%. Furthermore, the species of the arsenic in the surface layer was significantly inactivated from an active state to a stable state. These findings highlight the application of the FMC as a facile and cost-effective adsorbent for containment of arsenic in solutions and sediments, demonstrating that they are highly applicable for practical cases. HIGHLIGHTS Contaminated sediment was used as the support for the iron oxides.; FMC was used as an adsorbent and remediator.;
format	article
author	Yue Yin Gaoyang Xu Linlin Li Chunlei Qiao Yihua Xiao Tao Ma Changqing Liu
author_facet	Yue Yin Gaoyang Xu Linlin Li Chunlei Qiao Yihua Xiao Tao Ma Changqing Liu
author_sort	Yue Yin
title	Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials
title_short	Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials
title_full	Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials
title_fullStr	Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials
title_full_unstemmed	Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials
title_sort	removal of inorganic arsenic from aqueous solution by fe-modified ceramsite: batch studies and remediation trials
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/90d1cd1cb1d443dda31666d565383501
work_keys_str_mv	AT yueyin removalofinorganicarsenicfromaqueoussolutionbyfemodifiedceramsitebatchstudiesandremediationtrials AT gaoyangxu removalofinorganicarsenicfromaqueoussolutionbyfemodifiedceramsitebatchstudiesandremediationtrials AT linlinli removalofinorganicarsenicfromaqueoussolutionbyfemodifiedceramsitebatchstudiesandremediationtrials AT chunleiqiao removalofinorganicarsenicfromaqueoussolutionbyfemodifiedceramsitebatchstudiesandremediationtrials AT yihuaxiao removalofinorganicarsenicfromaqueoussolutionbyfemodifiedceramsitebatchstudiesandremediationtrials AT taoma removalofinorganicarsenicfromaqueoussolutionbyfemodifiedceramsitebatchstudiesandremediationtrials AT changqingliu removalofinorganicarsenicfromaqueoussolutionbyfemodifiedceramsitebatchstudiesandremediationtrials
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Removal of inorganic arsenic from aqueous solution by Fe-modified ceramsite: batch studies and remediation trials

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