文献类型：期刊文献

英文题名：Simultaneous oxidation and adsorption of As(III) from water by cerium modified chitosan ultrafine nanobiosorbent

作者：Zhang, Lingfan[1,2];Zhu, Tianyi[1];Liu, Xin[1];Zhang, Wenqing[1]

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：2016

卷号：308

起止页码：1

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20160401854754);WOS:【SCI-EXPANDED(收录号:WOS:000374803600001)】；

基金：We are grateful for the financial support by the 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：Adsorption; Chitosan; Cerium; Arsenic; Nanobiosorbent

摘要：Since most existing arsenic removal adsorbents are difficult to effectively remove arsenite (As(III)), an urgent need is to develop an efficient adsorbent for removing As(III) from contaminated water. In this study, a novel ultrafine nanobiosorbent of cerium modified chitosan (Ce-CNB) with simultaneous oxidation and adsorption As(III) performance has been successfully developed. The resulting Ce-CNB with or without As(III) adsorption was characterized by FTIR, XRD, SEM, EDS, TEM, EMI and XPS analysis. Batch of adsorption experiments were performed to investigate the effects of various conditions on the As(III) adsorption. The adsorption behaviors were well described by the Langmuir isotherm and the pseudo second-order kinetic model, with the maximum adsorption capacities of 57.5 mg g(-1). The adsorption mechanisms for As(III) were (i) formed monodentate and bidentate complexes between hydroxyl groups and arsenite; and (ii) partial As(III) oxidized to As(V) followed by simultaneously adsorbed on the surface of Ce-CNB. This novel nanocomposite can be reused while maintaining a high removal efficiency and can be applied to treat 5.8 L of As(III)-polluted water with the effluent concentration lower than the World Health Organization standard, which suggests its great potential to remove As(III) from contaminated water. (C) 2016 Elsevier B.V. All rights reserved.