Sökning: id:"swepub:oai:DiVA.org:ltu-4393" >
Adsorption of coppe...
Adsorption of copper at aqueous illite surfaces
-
- Du, Qing (författare)
- Luleå tekniska universitet,Research Center for Eco-Environmental Sciences, Academia Sinica, Beijing, China
-
- Sun, Zhongxi (författare)
- Luleå tekniska universitet
-
- Forsling, Willis (författare)
- Luleå tekniska universitet,Industriell miljö- och processteknik
-
visa fler...
-
- Tang, Hongxiao (författare)
- Research Center for Eco-Environmental Sciences, Academia Sinica, Beijing, China
-
visa färre...
-
(creator_code:org_t)
- Elsevier BV, 1997
- 1997
- Engelska.
-
Ingår i: Journal of Colloid and Interface Science. - : Elsevier BV. - 0021-9797 .- 1095-7103. ; 187:1, s. 232-242
- Relaterad länk:
-
https://ir.rcees.ac....
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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, Cu2(OH)2CO3(s), rather than a copper hydroxide precipitate. The existence of Cu2(OH)2CO3(s) in the carbonate-containing illite suspensions was identified by FT-IR analysis.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Chemistry of Interfaces
- Gränsytors kemi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas