Adsorption Mechanism of Attapulgite for Cu(ΙΙ) in Aqueous Solution

Jun Ren; Ya Qiong Zhao; Dong Dong Gou; Ling Tao; Mei Wei Zhang

doi:10.4028/www.scientific.net/AMR.1065-1069.1867

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1065-1069Adsorption Mechanism of Attapulgite for Cu(ΙΙ) in...

Adsorption Mechanism of Attapulgite for Cu(ΙΙ) in Aqueous Solution

Abstract:

Adsorption of Cu(Ⅱ) onto natural attapulgite was investigated with respect to temperature, initial concentration and contact time. The adsorption process can be well described by the pseudo-second-order kinetic model, and the equilibrium adsorption isotherm was closely fitted with the Freundlich model. Enthalpy change(△H⁰), entropy change(△S⁰) and Gibbs free energy change(△G⁰) were calculated from the temperature dependent sorption data, and the results indicated that the sorption of Cu(Ⅱ) on attapulgite was a spontaneous process, and the sorption was endothermic.

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Periodical:

Advanced Materials Research (Volumes 1065-1069)

Pages:

1867-1870

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.1867

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Online since:

December 2014

Authors:

Jun Ren*, Ya Qiong Zhao, Dong Dong Gou, Ling Tao, Mei Wei Zhang

Keywords:

Adsorption, Attapulgite, Cu(II), Isotherms, Kinetic

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