Arsenic re-mobilization in water treatment adsorbents, under reducing conditions: Part II. XAS and modeling study

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Arsenic re-mobilization in water treatment adsorbents, under reducing conditions: Part II. XAS and modeling study
	Liu, Suqin; Jing, Chuanyony; Meng, Xiaoquang
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2008-03-15
卷号	392 期号:1 页码:137-144
关键词	arsenic re-mobilization XANES EXAFS CD-MUSIC model
英文摘要	The mechanism of arsenic re-mobilization in spent adsorbents under reducing conditions was studied using X-ray absorption spectroscopy and surface complexation model calculations. X-ray absorption near edge structure (XANES) spectroscopy demonstrated that As(V) was partially reduced to As(III) in spent granular ferric hydroxide (GFH), titanium dioxide (TiO2), activated alumina (AA) and modified activated alumina (MAA) adsorbents after 2 years of anaerobic incubation. As(V) was completely reduced to As(III) in spent granular ferric oxide (GFO) under 2-year incubation. The extended X-ray absorption fine structure (EXAFS) spectroscopy analysis showed that As(III) formed bidentate binuclear surface complexes on GFO as evidenced by an average As(III)-O bond distance of 1.78 angstrom and As(III)-Fe distance of 3.34 angstrom. The release of As from the spent GFO and TiO2 Was simulated using the charge distribution multi-site complexation (CD-MUSIC) model. The observed redox ranges for As release and sulfate mobility were described by model calculations. (C) 2007 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000253585000015
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21915]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Liu, Suqin,Jing, Chuanyony,Meng, Xiaoquang. Arsenic re-mobilization in water treatment adsorbents, under reducing conditions: Part II. XAS and modeling study[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2008,392(1):137-144.
APA	Liu, Suqin,Jing, Chuanyony,&Meng, Xiaoquang.(2008).Arsenic re-mobilization in water treatment adsorbents, under reducing conditions: Part II. XAS and modeling study.SCIENCE OF THE TOTAL ENVIRONMENT,392(1),137-144.
MLA	Liu, Suqin,et al."Arsenic re-mobilization in water treatment adsorbents, under reducing conditions: Part II. XAS and modeling study".SCIENCE OF THE TOTAL ENVIRONMENT 392.1(2008):137-144.