文献类型：期刊文献

英文题名：Insight into the adsorption mechanisms of vanadium(V) on a high-efficiency biosorbent (Ti-doped chitosan bead)

作者：Liu, Xin[1];Zhang, Lingfan[1,2]

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

年份：2015

卷号：79

起止页码：110

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20240915625281);WOS:【SCI-EXPANDED(收录号:WOS:000359166300015)】；

基金：We are grateful for the financial support by National Natural Science Foundation of China (Grant no. 21407050).

语种：英文

外文关键词：Chitosan; Vanadium; Adsorption; Kinetics; Isotherms; Mechanisms

摘要：In this present study, a new chitosan bead modified with titanium ions (TiCB) was prepared and employed for the adsorption of vanadium ions from aqueous solutions. Batch adsorption experiments were performed to research the effect of various factors, including pH, temperature, contact time and initial concentration of vanadium(V) ions. The adsorption of vanadium was followed by the pseudo second-order kinetic and the Langmuir isotherm model, with a remarkable maximum adsorption capacity of 210 mg/g. The analysis of thermodynamic parameters (Delta G degrees, Delta H degrees and Delta S degrees) revealed that the nature of adsorption was feasible, spontaneous (Delta G degrees <0) and endothermic (Delta H degrees >0) process. FTIR, EDS, EMI and XPS studies suggested that the mechanisms of adsorption were possibly attributed to electrostatic attraction, ligand-exchange and redox reaction between TiCB and vanadium ions. (C) 2015 Elsevier B.V. All rights reserved.