DU Yucheng，SHI Mohan，LIN Penghui，LI Yang，ZHEN Shuang，MA Yanlong，WANG Jinshu

(Department of Materials and Manufacturing，Beijing University of Technology, Beijing 100124, China)

Abstract: In order to preferably treat ammonia nitrogen and sulfur in water bodies at low cost, the natural mineral vermiculite and volcanic rock particles were modified by NaCl and FeCl3, respectively. Scanning electron microscope(SEM), X-ray diffraction(XRD)and fourier transform infrared spectrometer(FTIR)techniques were adopted to characterize the mineral particles. The adsorption performances as well as mechanism of vermiculite and volcanic rock before and after modification towards ammonia nitrogenand sulfur were investigated, respectively. By comparison to raw vermiculite,after modification,the adsorption capacity of vermiculite towards ammonia nitrogen increased from 21.4 mg/g to 29.3 mg/g under the optimal conditions, and the removal efficiency increased from 86.7% to 93.4%. After modification, the adsorption capacity of volcanic rock for sulfide increased from 3.1 mg/g to 36.9 mg/g. The removal of ammonia nitrogen by vermiculite particles is mainly physical adsorption, and the removal of sulfur by volcanic rock particles is mainly chemical adsorption.

Keywords: vermiculite; volcanic rock; ammonia nitrogen adsorption; surface modification

中图分类号：TU7

文献标志码：A

文章编号：1008-5548(2021)06-0019-10

DOI:10.13732/j.issn.1008-5548.2021.06.003

收稿日期： 2021-08-10，修回日期：2020-08-31，在线出版时间：2021-10-18 14:27。

基金项目：国家自然科学基金，编号：51974011；宁夏回族自治区重点研发计划项目，编号：2019BFG02032。

第一作者简介：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。