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Mechanism of arsenate mobilization from goethite by aliphatic carboxylic acid

文献类型：期刊论文

作者Shi, R ; Jia, YF ; Wang, CZ ; Yao, SH
刊名JOURNAL OF HAZARDOUS MATERIALS
出版日期2009
卷号163期号:2-3页码:1129-1133
关键词Arsenate Adsorption Goethite Aliphatic carboxylic acid
ISSN号0304-3894
通讯作者Jia, YF, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
中文摘要Arsenic is highly toxic and therefore represents a potential threat to the environment and human health. The mobility and fixation of arsenic in natural environment is significantly affected by co-occurring dissolved natural organic acids, which are widely present in soils and sediments due to the decomposition of natural organic matters and the metabolism of plant roots and microorganisms. It was reported recently that at lower pH, citrate decreased arsenate adsorption on metal oxides as the result of competitive adsorption. This study examined the relationship between citrate-promoted goethite dissolution and citrate-suppressed arsenate adsorption in the equilibrated goethite-arsenate-citrate systems with different contact orders. The results indicated that there is obvious correlation between the suppression of arsenate adsorption and dissolution of goethite. Arsenate adsorption and goethite dissolution in the presence of citrate (1.0 mM), oxalate (1.5 mM) and acetate (3.0 mM) were compared. The results showed that arsenate adsorption was most significantly inhibited by citrate among the three organic acids. Although oxalate dissolved goethite more significantly, it inhibited arsenate adsorption much less than citrate. Hence it is proposed that the competition for binding sites rather than citrate-promoted goethite dissolution played a key role in the reduction of arsenate adsorption by citrate at lower pH. (C) 2008 Elsevier B.V. All rights reserved.
学科主题Engineering, Environmental; Engineering, Civil; Environmental Sciences
收录类别SCI
资助信息National Natural Science Foundation of China (NSFC) [40673079, 40773076]
语种英语
WOS记录号WOS:000264160000087
公开日期2011-09-23
源URL[http://210.72.129.5/handle/321005/54207]  
专题沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式
GB/T 7714		 Shi, R,Jia, YF,Wang, CZ,et al. Mechanism of arsenate mobilization from goethite by aliphatic carboxylic acid[J]. JOURNAL OF HAZARDOUS MATERIALS,2009,163(2-3):1129-1133.
APA Shi, R,Jia, YF,Wang, CZ,&Yao, SH.(2009).Mechanism of arsenate mobilization from goethite by aliphatic carboxylic acid.JOURNAL OF HAZARDOUS MATERIALS,163(2-3),1129-1133.
MLA Shi, R,et al."Mechanism of arsenate mobilization from goethite by aliphatic carboxylic acid".JOURNAL OF HAZARDOUS MATERIALS 163.2-3(2009):1129-1133.

入库方式： OAI收割

来源：沈阳应用生态研究所

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