Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand

doi:10.1016/j.chemosphere.2015.07.067

	Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand
	Cai, YB; Li, LL; Zhang, H; Zhang, H (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai, Shandong, Peoples R China. hzhang@yic.ac.cn
发表期刊	CHEMOSPHERE
ISSN	0045-6535
	2015-11-01
卷号	138 页码:758-764
关键词	Antimony Iron Oxide-coated Sand Adsorption-desorption Transport
DOI	10.1016/j.chemosphere.2015.07.067
产权排序	[Cai, Yongbing; Zhang, Hua] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai, Shandong, Peoples R China; [Cai, Yongbing] Univ Chinese Acad Sci, Beijing, Peoples R China; [Li, Lulu] Qingdao Univ, Coll Chem & Environm Engn, Qingdao, Shandong, Peoples R China
作者部门	中科院海岸带环境过程与生态修复重点实验室
英文摘要	Understanding the mechanisms and kinetics controlling the retention and transport of antimony (Sb) is prerequisite for evaluating the risk of groundwater contamination by the toxic element. In this study, kinetic batch and saturated miscible displacement experiments were performed to investigate effects of protonation-deprotonation reactions on sorption-desorption and transport of Sb(V) in iron oxide-coated sand (IOCS). Results clearly demonstrated that Sb(V) sorption was highly nonlinear and time dependent, where both sorption capacity and kinetic rates decreased with increasing solution pH. Breakthrough curves (BTCs) obtained at different solution pH exhibited that mobility of Sb(V) were higher under neutral to alkaline condition than under acidic condition. Because of the nonlinear and non-equilibrium nature of Sb(V) retention and transport, multi-reaction models (MRM) with equilibrium and kinetic sorption expressions were utilized successfully to simulate the experiment data. Equilibrium distribution coefficient (K-e) and reversible kinetic retention parameters (k(1) and k(2)) of both kinetic sorption and transport experiment showed marked decrease as pH increased from 4.0 to 7.5. Surface complexation is suggested as the dominant mechanism for the observed pH-dependent phenomena, which need to be incorporated into the kinetic models to accurately simulate the reactive transport of Sb(V) in vadose zone and aquifers. (C) 2015 Published by Elsevier Ltd.
文章类型	Article
收录类别	SCI
语种	英语
关键词[WOS]	ADSORPTION-DESORPTION ; SURFACE COMPLEXATION ; CLAY-MINERALS ; HUMIC-ACID ; SOILS ; SB(III) ; SB(V) ; ENVIRONMENT ; OXIDATION ; GOETHITE
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000361772800099
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/9999
专题	中国科学院海岸带环境过程与生态修复重点实验室海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室中国科学院海岸带环境过程与生态修复重点实验室_污染过程与控制实验室
通讯作者	Zhang, H (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai, Shandong, Peoples R China. hzhang@yic.ac.cn
推荐引用方式 GB/T 7714	Cai, YB,Li, LL,Zhang, H,et al. Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand[J]. CHEMOSPHERE,2015,138:758-764.
APA	Cai, YB,Li, LL,Zhang, H,&Zhang, H .(2015).Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand.CHEMOSPHERE,138,758-764.
MLA	Cai, YB,et al."Kinetic modeling of pH-dependent antimony (V) sorption and transport in iron oxide-coated sand".CHEMOSPHERE 138(2015):758-764.

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