Sethuraman P, Kumar M Dharmendira
Department of Chemical Engineering, A.C. Tech. Campus, Anna University, Chennai-600 025, India.
Pak J Biol Sci. 2011 Mar 1;14(5):327-35. doi: 10.3923/pjbs.2011.327.335.
The present study highlights the effective removal of Cu (II) ions from synthetic solution using bacteria such as B. subtilis, P. aeruginosa and E. cloacae. Batch biosorption studies show that the biosorption of B. subtilis is effective when the concentration ranges from 25-200 mg L(-1). Biomass dosage, pH and the initial metal ion concentration have a profound effect on the biosorption process and this is reported in this study. In order to understand the nature of the biosorption process, Langmuir and Freundlich isotherm models were applied. Pseudo first and second order models were used to study the biosorption kinetics. The results show that these bacterial strains are very much suitable for the removal of Cu (II) ions. Being cost effective and efficient in toxic metal ion removal, these bacteria can be used on a large scale.
本研究强调了利用枯草芽孢杆菌、铜绿假单胞菌和阴沟肠杆菌等细菌从合成溶液中有效去除铜（II）离子。批次生物吸附研究表明，当浓度范围为25 - 200 mg L(-1)时，枯草芽孢杆菌的生物吸附效果良好。生物量剂量、pH值和初始金属离子浓度对生物吸附过程有深远影响，本研究对此进行了报道。为了理解生物吸附过程的本质，应用了朗缪尔和弗伦德里希等温线模型。采用伪一级和二级模型研究生物吸附动力学。结果表明，这些细菌菌株非常适合去除铜（II）离子。由于具有成本效益且在去除有毒金属离子方面效率高，这些细菌可大规模使用。
