WU Shuai, HOU Tailei, YAN Liangguo

(School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China)

Abstract: To solve the difficulty of solid and liquid separation of powder bentonite material, the microspheres of bentonite and magnetic bentonite were prepared by fixing the bentonite and Fe3O4-bentonite with calcium alginate. The structure and property were investigated by X-ray diffraction pattern, Fourier transform infrared and scanning electron microscopy. Batch equilibrium experiments were used to evaluate the adsorption performance of the as-prepared microspheres for the typical dye pollutants of basic fuchsin and basic blue. The results show that the structure of bentonite and Fe3O4 are not changed during the synthesis procedure. The microsphere of Fe3O4-bentonite has magnetic property. The kinetic data of adsorption process of two dyes on adsorbents follow the pseudo-second-order kinetic model. The sorption isothermal data of the microspheres for the basic dyes are fitted to the Freundlich and Langmuir models. The maximum adsorption capacities for the basic blue and basic fuchsin are 185.7 and 63.46 mg/g on bentonite microspheres, 163.4 and 70.30 mg/g on magnetic bentonite microspheres, respectively.

Keywords: bentonite; magnetic materials; dye wastewater; adsorption; solid-liquid separation

文章编号：1008-5548(2020)03-0007-08

DOI:10.13732/j.issn.1008-5548.2020.03.002

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

收稿日期： 2019-12-13，修回日期：2019-12-25，在线出版时间：2020-02-10 13:31。

基金项目：国家自然科学基金项目，编号：21577048。

第一作者简介：吴帅(1994—)，男，硕士研究生，研究方向为环境功能材料。E-mail：971935000@qq.com。

通信作者简介：闫良国(1971—)，男，博士，教授，博士生导师，研究方向为环境功能材料。E-mail：chm_yanlg@ujn.edu.cn。