矿产综合利用Issue(1)：73-77,5.DOI:10.3969/j.issn.1000-6532.2013.01.020
镉在蒙脱石上的吸附解吸动力学与热力学研究
Kinetics and Thermodynamics of Cadmium Adsorption and Desorption on Montmorillonite
摘要
Abstract
An experimental study of adsorption kinetics and thermodynamics for Cd2+ on the montmorillonite and de-sorption kinetics and thermodynamics for Cd2+ with simulated acid rain were conducted by simulating the natural environment. The results indicated that the adsorption kinetics and desorption kinetics were fitted to the Lagergren quasi-second equation,the correlation coefficients( R) were larger than 0. 98 when the temperatures were 30℃,40℃ and 50℃ respectively. The adsorption capacity of cadmium on montmorillonite exhibited a process of rise-fall-rise-balance with the time delay at different temperature, and desorption capacity were increased at first and then equilibrium with increase of time. Adsorption process of cadmium on montmorillonite was a spontaneous endothermic process,and it was affected little by temperature. Desorption process was a non-spontaneous exothermic process,and temperature had a big influence on it.关键词
蒙脱石/镉/吸附/解吸/动力学/热力学Key words
Montmorillonite/ Cadmium/ Adsorption/ Desorption/ Kinetics/ Thermodynamics分类
矿业与冶金引用本文复制引用
刘慧,朱霞萍,付小君,刘文华,赵秋香,李锡坤..镉在蒙脱石上的吸附解吸动力学与热力学研究[J].矿产综合利用,2013,(1):73-77,5.基金项目
广东省财政厅地质专项资助(2011208) （2011208）
