Department of Chemistry, PRIST University, Vallam, Thanjavur, India.
Water Sci Technol. 2010;62(10):2435-41. doi: 10.2166/wst.2010.494.
Environmental contamination by toxic heavy metals is a significant universal problem. The main objective of the study is to use a biodegradable materials like Cyperus pangorei and Chitosan as a composite biosorbent for the removal of Cr(VI) from water. The newly prepared biosorbent is characterized and the capacity of Cr(VI) removal of the biosorbent is carried out systematically by batch mode operations. The adsorption capacity of the biosorbent is examined by changing the parameters like biosorbent dose, varying the initial contact time, varying initial concentration of metal ion and pH of the metal ion solution to know the actual mechanism taking place during the initial sorption process. The experimental data obtained were fitted with the Freundlich, Langmuir and Redlich-Peterson isotherm models and the pseudo first order and the pseudo second order kinetic models. Equilibrium data were fitted very well to the Langmuir Isotherm model and pseudo second order kinetic model. Desorption of the metal ion is also carried out using different concentration of NaOH.
环境污染的有毒重金属是一个重大的全球性问题。本研究的主要目的是使用生物可降解材料如香蒲和壳聚糖作为一种复合生物吸附剂，用于从水中去除 Cr(VI)。新制备的生物吸附剂进行了表征，并通过批式操作系统地进行了 Cr(VI)去除的生物吸附容量研究。通过改变生物吸附剂剂量、初始接触时间、金属离子初始浓度和金属离子溶液 pH 等参数，考察了生物吸附剂的吸附容量，以了解初始吸附过程中发生的实际机制。实验获得的数据与 Freundlich、Langmuir 和 Redlich-Peterson 等温模型以及拟一级和拟二级动力学模型拟合。平衡数据非常好地符合 Langmuir 等温模型和拟二级动力学模型。采用不同浓度的 NaOH 进行金属离子的解吸。
