Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media

Column experiments were conducted to investigate the effects of ion type, ion strength, humic acid (HA), and nanometer alumina (NA) particles on the transport of hexavalent chromium (HC) in saturated porous media. A one-dimensional model is developed to simulate the migration of HC affected by NA pa...

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Autores principales:	Ming Wu, Huihui Cao, Guoping Lu, Bill X. Hu, Zhou Cheng, Cehui Mo, Jianfeng Wu, Jichun Wu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Nanometer alumina Hexavalent chrome Humic acid Porous media Adsorption Transport Environmental pollution TD172-193.5 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/bab5e472951e4a1588a81e96530dce73
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spelling	oai:doaj.org-article:bab5e472951e4a1588a81e96530dce732021-11-28T04:27:23ZEffects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media0147-651310.1016/j.ecoenv.2021.113005https://doaj.org/article/bab5e472951e4a1588a81e96530dce732021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0147651321011179https://doaj.org/toc/0147-6513Column experiments were conducted to investigate the effects of ion type, ion strength, humic acid (HA), and nanometer alumina (NA) particles on the transport of hexavalent chromium (HC) in saturated porous media. A one-dimensional model is developed to simulate the migration of HC affected by NA particles. The results show that nano-alumina particles would enhance the mobility of HC in saturated porous media. However, the influence of NA on the migration of HC in porous media is complex. When the concentration of NA reaches 30 mg/L, HC has minimum retention parameter and best mobility. The transport of HC also is affected by ion strength and ion type. Higher ionic strength would decrease the retention of HC and enhance its mobility. Compared with sodium ion, calcium ion has larger effects on the transport of HC. Moreover, HA can improve the mobility of HC in saturated porous media, but the corresponding promoting effect decreases with the increase of HA concentration. As nanometer contaminants and HC come into the subsurface environment, findings from this study elucidate the key factors and processes controlling the transport of HC in porous media, which can promote the prediction and assessment of HC in the groundwater system.Ming WuHuihui CaoGuoping LuBill X. HuZhou ChengCehui MoJianfeng WuJichun WuElsevierarticleNanometer aluminaHexavalent chromeHumic acidPorous mediaAdsorptionTransportEnvironmental pollutionTD172-193.5Environmental sciencesGE1-350ENEcotoxicology and Environmental Safety, Vol 228, Iss , Pp 113005- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nanometer alumina Hexavalent chrome Humic acid Porous media Adsorption Transport Environmental pollution TD172-193.5 Environmental sciences GE1-350
spellingShingle	Nanometer alumina Hexavalent chrome Humic acid Porous media Adsorption Transport Environmental pollution TD172-193.5 Environmental sciences GE1-350 Ming Wu Huihui Cao Guoping Lu Bill X. Hu Zhou Cheng Cehui Mo Jianfeng Wu Jichun Wu Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media
description	Column experiments were conducted to investigate the effects of ion type, ion strength, humic acid (HA), and nanometer alumina (NA) particles on the transport of hexavalent chromium (HC) in saturated porous media. A one-dimensional model is developed to simulate the migration of HC affected by NA particles. The results show that nano-alumina particles would enhance the mobility of HC in saturated porous media. However, the influence of NA on the migration of HC in porous media is complex. When the concentration of NA reaches 30 mg/L, HC has minimum retention parameter and best mobility. The transport of HC also is affected by ion strength and ion type. Higher ionic strength would decrease the retention of HC and enhance its mobility. Compared with sodium ion, calcium ion has larger effects on the transport of HC. Moreover, HA can improve the mobility of HC in saturated porous media, but the corresponding promoting effect decreases with the increase of HA concentration. As nanometer contaminants and HC come into the subsurface environment, findings from this study elucidate the key factors and processes controlling the transport of HC in porous media, which can promote the prediction and assessment of HC in the groundwater system.
format	article
author	Ming Wu Huihui Cao Guoping Lu Bill X. Hu Zhou Cheng Cehui Mo Jianfeng Wu Jichun Wu
author_facet	Ming Wu Huihui Cao Guoping Lu Bill X. Hu Zhou Cheng Cehui Mo Jianfeng Wu Jichun Wu
author_sort	Ming Wu
title	Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media
title_short	Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media
title_full	Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media
title_fullStr	Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media
title_full_unstemmed	Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media
title_sort	effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/bab5e472951e4a1588a81e96530dce73
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Effects of nanometer alumina and humic acid on the retention and transport of hexavalent chromium in porous media

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