文献类型：期刊文献

英文题名：Microfluidic synthesis of thiourea modified chitosan microsphere of high specific surface area for heavy metal wastewater treatment

作者：Zhu, Yong[1];Bai, Zhi-Shan[1];Wang, Hua-Lin[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

年份：2017

卷号：28

期号：3

起止页码：633

外文期刊名：CHINESE CHEMICAL LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000395836200026)】；

基金：We acknowledge the support by National Basic Research Program of China (No. 2014CB748500) and National Natural Science Foundation of China (Nos. 51578239, 51322805).

语种：英文

外文关键词：Thiourea modification; Chitosan microsphere; High specific surface area; Microfluidic technology; Adsorption

摘要：An improved biosorbent of thiourea modified chitosan microsphere (TMCM) with high specific surface, favorable mechanical strength and excellent adsorption performance had been synthesized via microfluidic technology. Polyethylene glycol was used as a significant component added in aqueous solution of chitosan to produce such microspheres through droplets forming, chemical crosslinking and pores creating. For the improvement of adsorption capacity, thiourea was considered as an excellent choice in increasing amino functional group by graft modification. The SEM, FTIR and EDS were employed to detect distinct features of TMCM. Copper(II) was used to test the adsorption performance of TMCM. The experimental results indicated that TMCM exhibited higher adsorption capacity (q(e) = 60.6 mg g (1)) and faster adsorption rate than that non-modified chitosan microsphere (NMCM). The adsorption kinetic was described well by the pseudo-second order kinetic model, which suggested that chemical adsorption along with electrons transferring was dominant in adsorption process. (C) 2016 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.