期刊名称：International Research Journal of Environmental Sciences
电子版ISSN：2319-1414
出版年度：2014
卷号：3
期号：2
页码：83-92
语种：English
出版社：International Science Community Association
摘要：Batch experiments have been carried out to evaluate the removal of lead(II) ion from aqueous solutions by using fly ash under various conditions of metal ion concentration, contact time, pH, temperature and particle size. The adsorption data have been discussed using Freundlich and Langmuir adsorption isotherm models. The kinetics of adsorption have been discussed using Lagergren equation, pseudo second-order rate equation and intra-particle diffusion models. Thermodynamic parameters such as change in Gibbs free energy G, change in enthalpy H, and change in entropy S have been evaluated. The adsorption process has been found to be spontaneous, feasible and endothermic in nature.
关键词：Fly ash;adsorption;lead(II) ion;Langmuir isotherm;Lagergren first-order equation;pseudo-second-order equation;Intraparticle diffusion model
