简单青霉对镉（II）、锌（II）和铅（II）的生物吸附：等温线、动力学和热力学
Biosorption of cadmium(II), zinc(II) and lead(II) by Penicillium simplicissimum: Isotherms, kinetics and thermodynamics.
作者信息
Fan Ting, Liu Yunguo, Feng Baoying, Zeng Guangming, Yang Chunping, Zhou Ming, Zhou Haizhou, Tan Zhenfeng, Wang Xin
机构信息
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
出版信息
J Hazard Mater. 2008 Dec 30;160(2-3):655-61. doi: 10.1016/j.jhazmat.2008.03.038. Epub 2008 Mar 20.
The isotherms, kinetics and thermodynamics of Cd(II), Zn(II) and Pb(II) biosorption by Penicillium simplicissimum were investigated in a batch system. The effects of pH, initial metal ions concentration, biomass dose, contact time, temperature and co-ions on the biosorption were studied. Adsorption data were well described by both the Redlich-Peterson and Langmuir model. Chemical ion-exchange was found to be an important process based on free energy value from Dubini-Radushkevich isotherm for all metal ions. The results of the kinetic studies of all metal ions at different temperature showed that the rate of adsorption followed the pseudo second-order kinetics well. The thermodynamics constants DeltaG degrees , DeltaH degrees and DeltaS degrees of the adsorption process showed that biosorption of Cd(II), Zn(II) and Pb(II) ions on Penicillium simplicissimum were endothermic and spontaneous.
在间歇系统中研究了简单青霉对Cd(II)、Zn(II)和Pb(II)的生物吸附等温线、动力学和热力学。研究了pH值、初始金属离子浓度、生物量剂量、接触时间、温度和共存离子对生物吸附的影响。Redlich-Peterson模型和Langmuir模型均能很好地描述吸附数据。基于Dubini-Radushkevich等温线的自由能值，发现化学离子交换是所有金属离子的一个重要过程。不同温度下所有金属离子的动力学研究结果表明，吸附速率很好地符合准二级动力学。吸附过程的热力学常数ΔG°、ΔH°和ΔS°表明，简单青霉对Cd(II)、Zn(II)和Pb(II)离子的生物吸附是吸热且自发的。
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