摘要
对壳聚糖-铝氧化物复合材料吸附Cd2+离子的动力学和热力学进行了研究.在实验条件下,动力学研究表明该吸附符合伪二级动力学方程,吸附表观活化能Ea=46.11 kJ/mol;热力学研究表明,此吸附过程符合Langmuir等温方程,焓变ΔHθ=11.15 kJ/mol,熵变ΔSθ=80.11 J/(mol.K),吸附吉布斯自由能ΔGθ数值随温度升高而减小.
Kinetics and thermodynamic on the adsorption of Cd^2＋ onto chitosan-alummmm oxloe composite material was studied. Kinetic studies indicated that the adsorption oi Cd^2＋ onto ehitosan-aluminium oxide composite material was in line with pseudo-second-order equation and the apparent adsorption activation energy （Ea） was 46.11 kJ/mol. Thermodynamic studies indicated that the adsorption of Cd^2＋ onto chitosan-aluminium oxide composite material conformed to Langmuir adsorption equation. Enthalpy of adsorption （AH^θ） was 11.15 kJ/mol and entropy of adsorption （AS^θ） was 80.11 J/（mol ·K）. Gibbs free energy （AG^θ） decreased with temperature increasing.
出处
《河北大学学报（自然科学版）》
CAS
北大核心
2011年第4期380-384,共5页
Journal of Hebei University(Natural Science Edition)
基金
河北省科技厅指导性计划项目(07215140)
河北大学博士基金资助项目(2007-098)
关键词
壳聚糖
复合材料
吸附
动力学
热力学
chitosan
composite material
adsorption
kinetics
thermodynamics
