YANG Lanpeng， ZHU Jian， WANG Ping， YANG Yuzhong， TAN Rong， ZENG jing， YANG Xiong
（College of Environmental Science and Engineering， Central South University of Forestry and Technology， Changsha 410004， China）
Abstract：In order to systematically grasp the adsorption properties and the differences of hexavalent chromium on hydrotalcite, zeolite and diatomite, the static adsorption of hexavalent chromium by hydrotalcite, zeolite and diatomite were investigated. The physicochemial properties of the adsorbing materials were characterized by SEM, EDS and FTIR. The results show that the adsorption of hexavalent chromium on hydrotalcite and diatomite fits with Freundlich model. The adsorption on zeolite fits with Langmuir model. According to the Langmuir equation, the maximum adsorption capacity of hydrotalcite, zeolite and diatomite are 8.62, 12.57 and 6.32 mg·g-1, respectively, which are all preferential adsorption. The fitting degree of the three kinds of adsorbents for pseudo-second-orderkinetic is the best. The adsorption of the tree adsorbents is spontaneous, endothermic and disorderly. From the physical and chemical properties, the zeolite has the best adsorption conditions.
Keywords: hydrotalcite; zeolite; diatomite; adsorption; chromium
文章编号：1008-5548（2017）05-0028-07
DOI：10.13732/j.issn.1008-5548.2017.05.006
收稿日期：2016-08-02， 修回日期：2017-01-09，在线出版时间：2017-10-30。
基金项目：湖南省高校创新平台开放基金项目，编号：15K147，13K070；湖南省重点研发计划项目，编号：2015SK20043；湖南省优秀博士学位论文获得者科研项目，编号：YB2015B031；湖南省环境保护科技计划项目，编号：湘财建指[2014]287 号；中南林业科技大学引进高层次人才科研启动基金项目，编号：2015YJ041；湖南省环境科学重点学科建设基金项目，编号：2310006。
第一作者简介：杨岚鹏（1993—），男（土家族），硕士研究生，研究方向为环境生物技术。E-mail:496522549@qq.com。
通信作者简介：
朱健（1983—），男，博士，讲师，研究方向为土水重金属污染控制与修复。E-mail:zhujian198312@163.com。
王平（1964—），男，博士，教授，博士生导师，研究方向为土水污染控制与生物修复。E-mail: csfuwp@163.com。
