Assessment of the adsorption kinetics, equilibrium and thermodynamics for the potential removal of Ni²⁺ from aqueous solution using waste eggshell

Journal of Environmental Engineering and Landscape Management

Sukru Aslan¹  Ayben Polat¹  Ugur Savas Topcu¹ 

[1] Department of Environmental Engineering, Cumhuriyet University, 58140, Sivas, Turkey;

关键词: adsorption isotherms;    eggshell;    nickel;    thermodynamics;   

DOI  :  10.3846/16486897.2015.1005015

来源: DOAJ

【 摘 要 】

In this study, Ni2+ sorption onto the waste eggshell was investigated under different operational conditions. Results indicated that the eggshell could be successfully used to remove Ni2+ ions from the water. Quick sorption process reached to equilibrium in about 2 hours with maximum sorption at pH 7.0. Based on the experimental data, Langmuir isotherm model with the qm value of 1.845 mg Ni2+/g eggshell was observed. The pseudo-second-order model provided the best correlation coefficient in comparison with other models. The calculated qe values derived from the pseudo-second-order for sorption of Ni2+ ions were very close to the experimental (qexp) values. Such thermodynamic parameters as ΔG°, ΔH°, and ΔS° were determined in order to predict the nature of adsorption. Results indicated that the adsorption of Ni2+ onto the eggshell was endothermically supported by the increasing adsorption of Ni2+ ions with temperature.

【 授权许可】

Unknown