Adsorption of copper at aqueous illite surfaces

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

	Adsorption of copper at aqueous illite surfaces
	Du, Q; Sun, ZX; Forsling, W; Tang, HX
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	1997
卷号	187 期号:1 页码:232-242
关键词	illite copper adsorption potentiometric titrations FT-IR analysis constant capacitance model
英文摘要	In this paper, we conducted potentiometric titrations, batch adsorption experiments and FT-IR analysis to study the uptake of copper in illite/water suspensions and then applied the constant capacitance surface complexation model to interpret the reaction mechanism at the aqueous illite surfaces. Our research shows that the copper adsorption at these surfaces is strongly dependent on pH and that the adsorption causes a deprotonation of surface groups. We propose that the uptake of copper in the carbonate-free illite suspensions can be explained by the formation of mononuclear surface complexes, =SOCu+ and =SOCuOH, and a multinuclear surface complex, =SOCu2(OH)(+)(2), followed by the formation of a bulk precipitate, Cu(OH)(2)(s), or a surface precipitate, =SOCu2(OH)(3)(sp). For the illite suspensions containing carbonates, we propose that the copper-illite interaction can be depicted by the formation of mononuclear surface complexes, =SOCu+ and =SOCuOH, followed by the formation of a copper hydroxylcarbonate precipitate, Cu-2(OH)(2)CO3(s), rather than a copper hydroxide precipitate. The existence of Cu-2(OH)(2)CO3(s) in the carbonate-containing illite suspensions was identified by FT-IR analysis. (C) 1997 Academic Press.
WOS记录号	WOS:A1997WN14200023
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24356]
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	Du, Q,Sun, ZX,Forsling, W,et al. Adsorption of copper at aqueous illite surfaces[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,1997,187(1):232-242.
APA	Du, Q,Sun, ZX,Forsling, W,&Tang, HX.(1997).Adsorption of copper at aqueous illite surfaces.JOURNAL OF COLLOID AND INTERFACE SCIENCE,187(1),232-242.
MLA	Du, Q,et al."Adsorption of copper at aqueous illite surfaces".JOURNAL OF COLLOID AND INTERFACE SCIENCE 187.1(1997):232-242.