Competitive and cooperative adsorption of arsenate and citrate on goethite

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	Competitive and cooperative adsorption of arsenate and citrate on goethite
	Shi, R; Jia, YF; Wang, CZ; Jia, YF, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
	2009
卷号	21 期号:1 页码:106-112
关键词	Adsorption Arsenate Citrate Goethite
ISSN号	1001-0742
英文摘要	The fate of arsenic in natural environments is influenced by adsorption onto metal (hydr)oxides. The extent of arsenic adsorption is strongly affected by coexisting dissolved natural organic acids. Recently, some studies reported that there existed competitive adsorption between arsenate and citrate on goethite. Humic acid is known to interact strongly with arsenate by forming complexes in aqueous solution, hence it is necessary to undertake a comprehensive study of the adsorption of arsenate/citrate onto goethite in the presence of one another. The results showed that at the arsenate concentrations used in this study (0.006-0.27 mmol/L), citrate decreased arsenate adsorption at acidic pH but no effect was observed at alkaline pH. In comparison, citrate adsorption was inhibited at acidic pH, but enhanced at alkaline pH by arsenate. This was probably due to the formation of complex between arsenate and citrate like the case of arsenate with humic acid. These results implied that the mechanism of the adsorption of arsenate and citrate onto goethite in the presence of one another involved not only competition for binding sites, but the cooperation between the two species at the water-goethite interface as well.
学科主题	Environmental Sciences
语种	英语
WOS记录号	WOS:000262568800019
资助机构	National Natural Science Foundation of China [40673079, 40773076]
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54265]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Jia, YF, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Shi, R,Jia, YF,Wang, CZ,et al. Competitive and cooperative adsorption of arsenate and citrate on goethite[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2009,21(1):106-112.
APA	Shi, R,Jia, YF,Wang, CZ,&Jia, YF, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China.(2009).Competitive and cooperative adsorption of arsenate and citrate on goethite.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,21(1),106-112.
MLA	Shi, R,et al."Competitive and cooperative adsorption of arsenate and citrate on goethite".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 21.1(2009):106-112.