Department of Chemical Engineering, Faculty of Engineering, Tarbiat Modares University, P.O. Box 14115-111, Tehran, Iran.
J Hazard Mater. 2010 Mar 15;175(1-3):304-10. doi: 10.1016/j.jhazmat.2009.10.004. Epub 2009 Oct 9.
The biosorption characteristics of nickel(II) ions using the brown algae (Cystoseria indica, Nizmuddinia zanardini, Sargassum glaucescens and Padina australis) were investigated. Experimental parameters affecting the biosorption process such as pH level, contact time, initial metal concentration and temperature were studied. The equilibrium data fitted very well to the Langmuir adsorption model in the concentration range of nickel(II) ions and at all the temperatures studied. Evaluation of the experimental data in terms of biosorption dynamics showed that the biosorption of nickel(II) onto algal biomass followed the pseudo-second-order dynamics well. The calculated thermodynamic parameters (Delta G degrees, Delta H degrees and DeltaS degrees) showed that the biosorption of nickel(II) ions were feasible, spontaneous and endothermic at the temperature ranges of 293-313 K.
研究了利用褐藻（Cystoseria indica、Nizmuddinia zanardini、Sargassum glaucescens 和 Padina australis）吸附镍（II）离子的生物吸附特性。研究了影响生物吸附过程的实验参数，如 pH 值、接触时间、初始金属浓度和温度。在镍（II）离子浓度范围内和所有研究温度下，平衡数据非常符合朗缪尔吸附模型。根据生物吸附动力学对实验数据进行评估表明，镍（II）离子在藻类生物质上的吸附很好地遵循拟二级动力学。计算得到的热力学参数（ΔG°、ΔH°和ΔS°）表明，在 293-313 K 的温度范围内，镍（II）离子的生物吸附是可行的、自发的和吸热的。
