文献类型：期刊文献

英文题名：Zirconium cross-linked chitosan composite: Preparation, characterization and application in adsorption of Cr(VI)

作者：Zhang, Lingfan[1,2];Xia, Wei[2];Teng, Bo[2];Liu, Xin[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：2013

卷号：229

起止页码：1

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20132716475219);WOS:【SCI-EXPANDED(收录号:WOS:000324349200001)】；

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：Zirconium-chitosan composite; Chromium; Adsorption; Ligand exchange

摘要：In the present paper, a zirconium-chitosan (Zr-CTS) composite is reported for adsorption of Cr(VI). The Zr-CTS composite was synthesized through the coordination reaction between zirconium oxychloride and chitosan biopolymeric matrix. Then the prepared composite was characterized by FT-IR, XRD, SEM and EDS. The adsorption properties of the resulting composite toward Cr(VI) were systematically investigated. Various factors possibly affecting the adsorption behavior were also studied. The results demonstrated that the equilibrium adsorption behavior of Cr(VI) on the prepared Zr-CTS composite had a good agreement with the Langmuir isotherm model (R-2 = 0.9993), and the maximum adsorption capacity was calculated as 175 mg g(-1) for Cr(VI) with pH 5.0 at 30 degrees C. The thermodynamic results revealed that chromium adsorption was a spontaneous and endothermic process. Furthermore, co-existing ions including nitrate, chloride and sulfate had effects on the uptake of Cr(VI) on the Zr-CTS composite. The Cr(VI) adsorbed Zr-CTS composite was regenerated with an efficiency of greater than 91% using 0.05 mol L-1 sodium hydroxide. (C) 2013 Elsevier B.V. All rights reserved.