文献类型：期刊文献

英文题名：Adsorption of Cr(VI) on cerium immobilized cross-linked chitosan composite in single system and coexisted with Orange II in binary system

作者：Zhu, Tianyi[1];Huang, Wei[2];Zhang, Lingfan[1];Gao, Jie[1];Zhang, Wenqing[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Shanghai Inst Measurement & Testing Technol, Shanghai 201203, Peoples R China

年份：2017

卷号：103

起止页码：605

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20242616339238);WOS:【SCI-EXPANDED(收录号:WOS:000408286400069)】；

基金：We are grateful for the financial support by National Natural Science Foundation of China (Grant No. 21407050) and the Fundamental Research Funds for the Central Universities (Grant No. 22A201514019).

语种：英文

外文关键词：CTS-Ce; Cr; Orange II

摘要：In this work, cerium immobilized cross-linked chitosan (CTS-Ce) composite, employed as an efficient adsorbent for Cr(VI) in single system and coexisted with Orange II (OII) in binary system, was prepared by co-precipitation method. The as-obtained adsorbent was characterized by FTIR, SEM, EDS and XPS before and after adsorption. The adsorption behaviors of Cr(VI) in single and binary system were systematically studied. The maximum adsorption capacity of Cr(Vl) on CTS-Ce (202.8 mg/g) was calculated by Langmuir equation in single metal system, but it decreased to 112.9 mg/g with initial concentration of 100 mg/L OII in binary system at pH 2 and 293 K. The adsorption data for Cr(VI) followed the Langmuir model in single system, while fitted Temkin model well in binary system. In both single and binary system, the kinetics of adsorption exhibited pseudo-second order behavior and adsorption capacity increased with increasing temperature. Moreover, the data of thermodynamic parameters (Delta G degrees < 0, Delta H degrees > 0) indicated that the adsorption was a spontaneous and endothermic process. Besides, vertical bar Delta G(Cr)vertical bar > vertical bar Delta G(Cr-OII)vertical bar at the same temperature further suggested that Cr(VI) was adsorbed on the CTS-Ce composite faster in binary system than in single system. (C) 2017 Elsevier B.V. All rights reserved.