Study on the Adsorption Performance of Zn(II) over Bentonite

Guo Xiang Pan; Ya Jing Zhang; Da Gan Chai; Yan Fei Yu

doi:10.4028/www.scientific.net/KEM.575-576.276

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 575-576Study on the Adsorption Performance of Zn(II) over...

Study on the Adsorption Performance of Zn(II) over Bentonite

Abstract:

Bentonite is applied in the simulative waste water containing Zn (II) ions in this paper, and the influences of initial pH value, temperature, adsorption time, Zn (II) concentration on the adsorption performance have been tested, and thermodynamic and kinetic equation are fitted. The results show that Zn (II) adsorption capacity increases firstly and then tends to balance as the pH increases. The higher the temperature is, the better adsorption capacity is. Zn (II) adsorption occurs within 60 minutes. Langmuir equation is used to fit adsorption thermodynamic equation, which indicates that the adsorption can occur spontaneously, and it is an endothermic and entropy increasing process. In addition, a kinetic equation is more suitable for the description of Zn (II) adsorption mechanism, and adsorption activation energy calculated is 6.90 kJ/mol.

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Periodical:

Key Engineering Materials (Volumes 575-576)

Pages:

276-279

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.575-576.276

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Online since:

September 2013

Authors:

Guo Xiang Pan, Ya Jing Zhang, Da Gan Chai, Yan Fei Yu

Keywords:

Adsorption, Bentonite, Kinetic, Thermodynamic, Zinc Ion

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