期刊
JOURNAL OF SAUDI CHEMICAL SOCIETY
卷 15, 期 2, 页码 105-112出版社
ELSEVIER
DOI: 10.1016/j.jscs.2010.06.003
关键词
Adsorption; Nano-crystalline; hydroxyapatite; Heavy metal; Ni2+ ion; Isotherms
资金
- Materials and Energy Research Center, Karaj, Iran [388873]
The potential of the synthesized nano-hydroxyapatite to remove Ni2+ from aqueous solutions was investigated in batch reactor under different experimental conditions. The study also investigates the effects of process parameters such as initial concentration of Ni2+ ion, temperature, and adsorbent mass. Various thermodynamic parameters, such as Delta G degrees, Delta H degrees and Delta S degrees have been calculated. The thermodynamics of Ni2+ ion onto nano-HAp system indicates spontaneous and endothermic nature of the process. Nickel uptake was quantitatively evaluated using the Langmuir, Freundlich and Dubinin-Kaganer-Radushkevich model. The adsorption data follow the adsorption equilibrium was described well by the Langmuir isotherm model with maximum adsorption capacity of 46.17 mg/g of Ni2+ ions on nano-HAp. (C) 2010 King Saud University. Production and hosting by Elsevier B.V. All rights reserved.
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