生物质化学工程Issue(1)：22-28,7.DOI:10.3969/j.issn.1673-5854.2016.01.005
王棕果壳粉吸附亚甲基蓝性能研究
Study on Adsorption of Methylene Blue on Roystonea regia Shell
摘要
Abstract
The adsorption properties of Roystonea regia shell for methylene blue at different conditions were studied. The optimal adsorption conditions were the dosage of Roystonea regia shell 10 g/L, PH value 7, adsorption time 30 min and temperature 30℃. At this condition, the removal rate of MB was about 96. 11%. The pseudo-first-order, pseudo-second-order and intraparticle diffusion models were used to fit adsorption data in the kinetic studies. And the results showed that the adsorption kinetic described by the pseudo-second-order model was more accurate with R2>0. 999 1 and values of qe.cal and qe.exp were close . The equilibrium isotherms were conducted by using Langmuir and Freundlich models. The adsorption could be well depicted by the Langmuir adsorption isotherm(R2>0.995). And the maximum monolayer adsorption capacity was 17.36 mg/g at 303K estimated from the Langmuir model. The Gibbs free energy change(ΔG0 ) , enthalpy change (ΔH0 ) , entropy change (ΔS0 ) and adsorption potential( E) were calculated. The ΔG0 , ΔH0 and ΔS0 were negative. This indicated that the adsorption was a spontaneous, exothermic and decreasing entropy process. At the same temperature, with the increase of concentration of methylene blue solution, the adsorption potential gradually reduced.关键词
王棕果壳/亚甲基蓝/吸附/动力学/热力学Key words
Roystonea regia shell/methylene blue/adsorption/kinetics/thermodynamics分类
化学化工引用本文复制引用
杨新周..王棕果壳粉吸附亚甲基蓝性能研究[J].生物质化学工程,2016,(1):22-28,7.基金项目
校级科学研究项目( DSK201506) （ DSK201506）
