ZHENG Guangwei1 ， DU Yucheng1 ， HOU Ruiqin2 , WANG Liping1 , SUN Guangbing1
（1. Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124, China; 2. Engineering Research Institute, Chinese People's Liberation Army General Armament Department, Beijing 100028, China）
Abstract: The adsorbents of flowerlike nano-sized MnO2 in-situ grown on diatomite were prepared using the hydrothermal method. The samples were characterized by XRD, SEM, TEM, HRTEM, and N2 adsorptiondesorption methods. The results indicate that the sample obtained after hydrothermal treatment for 8 h shows the surface area of 141 m2/g and the particle diameter corresponding to accumulate volume fraction of 50% (d50) is 35.14 μm. The Cr (VI) and As (V) removal efficiencies are 100% and 99.98% with the aqueous solution mass concentration of 10 mg/L. The maximum capacities for Cr (VI) and As (V) adsorption are respectively 157.6 and 93.2 mg/g.
Keywords: diatomite; in-situ growth; flowerlike nano-sized MnO2; adsorption
中图分类号：TB34 文献标志码：A
文章编号：1008-5548（2014）05-0063-05
DOI:10.13732/j.issn.1008-5548.2014.05.016
收稿日期：2013-11-01， 修回日期：2013-11-22，在线出版时间：2014-10-11。
基金项目：吉林省产业技术创新战略联盟项目，编号：20130305015GX；北京市自然科学基金项目，编号：2142008。
第一作者简介：郑广伟(1988—)，男，硕士研究生，研究方向为功能材料制备及重金属离子吸附性能。 E-mail:zhengguanggweii111@126.com。
通信作者简介：杜玉成(1963—)，男，博士，教授级高级工程师，研究方向为无机功能材料、非金属矿物功能材料制备与应用。 电 话：010-67396129，13552567929，E-mail：ychengdu@bjut.edu.cn。
