Statistical design and kinetic and thermodynamic studies of Ni(Ⅱ) adsorption on bentonite

作     者：Bahareh Sadeghalvad Amir Reza Azadmehr Hassan Motevalian 

作者机构：Department of Mining&Metallurgical EngineeringAmirkabir University of TechnologyTehranIran 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2017年第24卷第7期

页      码：1529-1536页

摘      要：The adsorption of the bentonite toward Ni(II) from aqueous solution was studied to obtain optimum conditions,equilibrium model,thermodynamic and kinetic *** method was used to evaluate maximum amount of adsorbed Ni(II).In this work,p H of solution during stirring,contact time,initial Ni(II) concentration,particle size of bentonite and amount of bentonite were considered as effective parameters which should be *** increase of temperature has negative effect on the Ni(II) *** equilibrium data were correlated well with Freundlich and Dubinin–Radushkevich isotherm models the correlation coefficients of which are(R^2) 0.994 and 0.971,*** model indicates heterogeneous and chemical absorption or ion exchange *** values of thermodynamic parameters such as ΔH°,ΔS° and ΔG° of nickel adsorption reveal that it is a spontaneous,exothermic and associative *** experimental data fit the pseudo-second-order kinetic very well with correlation coefficient(R^2) more than 0.995.

主 题 词：bentonite adsorption experimental design optimum condition equilibrium 

学科分类：083002[083002] 0830[工学-生物工程类] 0709[理学-地质学] 070901[070901] 07[理学] 08[工学] 

核心收录：

D　O　I：10.1007/s11771-017-3557-y

馆 藏 号：203262127...