文献类型：期刊文献

英文题名：Preparation and characterization of chitosan-zirconium(IV) composite for adsorption of vanadium(V)

作者：Zhang, Lingfan[1,2];Liu, Xin[2];Xia, Wei[2];Zhang, Wenqing[2]

机构：[1]E China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：64

起止页码：155

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20235015206314);WOS:【SCI-EXPANDED(收录号:WOS:000334147300025)】；

基金：We are grateful for the financial support from Research Center of Analysis and Test (ECUST, China) and National Key Technologies R&D Program of China (Grant 2010BAK67B15).

语种：英文

外文关键词：Chitosan; Zirconium; Adsorption

摘要：In this present study, an inorganic-biopolymer composite based on chitosan-zirconium(IV) was prepared and investigated as a biosorbent for the removal of vanadium(V) ions from aqueous solution. The resulting composite before and after adsorbed V(V) were characterized by using FT-IR, XRD, SEM and EDS, respectively. Various relevant parameters affecting the adsorption capacity such as pH, initial concentration, contact time, temperature and co-existing ions were evaluated. The results demonstrated that the optimum pH was found to be 4.0 and the equilibrium was achieved after 4h for V(V) adsorption. The Langmuir isotherm model could be well described the adsorption of V(V), with the maximum adsorption capacity of 208 mg g(--1) at 30 C. The kinetics data were well fitted to pseudo-second-order equation, indicating that chemical sorption as the rate-limiting step of adsorption mechanism. The calculated thermodynamic parameters such as Delta G degrees, Delta H degrees and Delta S degrees indicated that the adsorption process was feasible, spontaneous and endothermic in nature. Moreover, co-existing ions including nitrate, chloride and sulfate had a certain effect on the uptake of V(V). The V(V) loaded chitosan-zirconium(IV) composite could be regenerated by 0.01 mol L-1 sodium hydroxide, with efficiency greater than 95%. (C) 2013 Elsevier B.V. All rights reserved.