Kinetics and Thermodynamics of Lead(II) and Copper(II) Adsorption onto Oil shale fly ash
The kinetics and thermodynamics characteristics of Pb(Ⅱ) and Cu(Ⅱ) adsorption onto fly ash of a oil shale-fired power plant was investigated by using batch adsorption method. The results showed that Langmuir and Freundlich adsorption isotherms were applicable to the adsorption process, while Freundlich equation is more applicable. The mechanistic steps of the adsorption process was studied through data fitting of the experimental data using the equation of Lagergren pseudo-firstorder kinetics, the pseudo-second-order kinetics, and the intraparticle diffusion model. All the three equations were found applicable in initial stage of this study, and the absorptions of Pb(Ⅱ) and Cu(Ⅱ) onto fly ash from oil shale-fired CFB was in accordance of the pseudo-2nd-order reaction kinetics. The absorption characteristics of metal ions on oil shale fly ash were controlled by both film diffusion and particle diffusion. Thermodynamic analysis showed that the processes of oil shale fly ash adsorption Pb(Ⅱ) and Cu(Ⅱ) are endothermic reaction and a spontaneous process.
Jingru BAI Qing WANG Yingjun YANG Xiaohui GUAN
Northeast Dianli University Jinlin, 132012, China China University of Petroleum Beijing, 102249, Chi Northeast Dianli University Jinlin, 132012, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）