JIN Cuixin，DU Yucheng，LI Yang，WANG Xuekai，NIU Yan，GU Hengxue，LI Shenghui

(Key Laboratory of Advanced Functional Materials，Ministry of Education，College of Materials Science and Engineering，Beijing University of Technology，Beijing 100124，China)

Abstract:The amino-functionalized diatomite composite samples was synthesized via water bath stiring method，in which 3-aminopropyl triethoxysilane and diethylenetriamine supplied amino functional groups. The samples were characterized by FTIR, SEM, TGA-DSC and XPS, and the adsorption of Pb(Ⅱ) and Cr(Ⅵ) were investigated. The results show that the maximum adsorption capacity of Pb (II) and Cr (VI) are 184.69 and 109.65 mg/g, respectively, with diethylenetriamine modification samples. The removal rate of Pb(Ⅱ) and Cr(Ⅵ) reach 95%, with initial concentration of 20 mg/L. The adsorption models for Pb(Ⅱ) and Cr(Ⅵ) are keeping with the langmuir adsorption model.

Keywords:diatomite；amino-functionalized；liquid grafting；Pb(Ⅱ) adsorption；Cr(Ⅵ) adsorption

中图分类号：TB34； X703                          文献标志码：A

文章编号：1008-5548(2020)04-0001-08

DOI:10.13732/j.issn.1008-5548.2020.04.001

收稿日期： 2019-01-18，修回日期：2020-02-12，在线出版时间：2020-05-07 14:14。

基金项目：国家重点研发计划项目，编号：2017YFB0310800；宁夏回族自治区重点研发计划项目，编号：2019BFG02032。

第一作者简介：靳翠鑫(1995—)，女，硕士研究生，研究方向为环境功能材料、非金属矿物材料。E-mail：jcuixin@163.com。

通信作者简介：杜玉成(1963—)，男，博士，教授，硕士生导师，研究方向为环境功能材料、非金属矿物材料。E-mail：ychengdu@bjut.edu.cn。