Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediène, Bab Ezzouar 16111, Alger Algeria.
J Hazard Mater. 2009 Dec 30;172(2-3):1150-5. doi: 10.1016/j.jhazmat.2009.07.116. Epub 2009 Aug 4.
This paper deals with the removal of Cadmium from aqueous solutions by polysaccharide produced from Paenibacillus polymyxa. The effects of contact time, initial metal ions concentration, mass of the polysaccharide and pH were studied. The Freundlich and Dubinin-Radushkevich (D-R) models have been applied and the equilibrium adsorption was found to best fit the Dubinin-Radushkevich adsorption isotherm based on the coefficient of correlation, R(2). The maximum Cd(2+) uptake was 520.09 mg g(-1). An empirical modeling was performed by using a 2(3) full factorial design and a regression equation for adsorption of Cd(2+) was determined from the data. The pH and the initial concentration of Cadmium are the most significant parameters affecting Cd(2+) adsorption followed by the mass of the polysaccharide.
本文研究了从水溶液中去除镉的方法，所用的多糖是由多粘类芽孢杆菌产生的。考察了接触时间、初始金属离子浓度、多糖质量和 pH 值对吸附的影响。应用了 Freundlich 和 Dubinin-Radushkevich（D-R）模型，基于相关系数 R(2)，发现平衡吸附最符合 Dubinin-Radushkevich 吸附等温线。最大的 Cd(2+)吸附量为 520.09mg/g。通过使用 2(3)完全析因设计进行了经验建模，并从数据中确定了吸附 Cd(2+)的回归方程。影响 Cd(2+)吸附的最显著参数是 pH 值和初始镉浓度，其次是多糖的质量。
