Adsorption of Pb(II) and Cr(III) from aqueous solution on Celtek clay

被引:419
作者
Sari, Ahmet
Tuzen, Mustafa [1 ]
Soylak, Mustafa
机构
[1] Gaziosmanpasa Univ, Dept Chem, TR-60250 Tokat, Turkey
[2] Erciyes Univ, Dept Chem, TR-38039 Kayseri, Turkey
关键词
lead; chromium; Celtek clay; adsorption isotherm; thermodynamic parameter;
D O I
10.1016/j.jhazmat.2006.09.080
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This paper presents the adsorption of Pb(Il) and Cr(III) from aqueous solution on Celtek clay. Batch experiments were carried out as a function of the adsorbent dosage, solution pH, shaking time, and temperature. The equilibrium data of fitted well with the linear Langmuir and Freundlich models. Dubinin-Radushkevick (D-R) isotherm model was applied to describe the nature of the adsorption of the metals, and found that it occurred physically. Thermodynamic parameters, the change in Gibbs free energy change (Delta G degrees), enthalpy (Delta H degrees) and entropy (Delta S degrees) were also calculated. These parameters indicated that the adsorptionof Pb(II) andCr(III) on Celtek clay was feasible, spontaneous and exothermic process in nature. Based on the results, it was concluded that Celtek clay had a significant potential for removing Pb(II) and Cr(III) from wastewater using adsorption method. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:41 / 46
页数:6
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