Ultrahigh sorption and reduction of Cr(VI) by two novel core-shell composites combined with Fe3O4 and MoS2

Shanye Yang; Qian Li; Liang Chen; Zhongshan Chen; Zengxin Pu; Huihui Wang; Shujun Yu; Baowei Hu; Jianrong Chen; Xiangke Wang

doi:10.1016/j.jhazmat.2019.120797

Ultrahigh sorption and reduction of Cr(VI) by two novel core-shell composites combined with Fe₃O₄ and MoS₂

J Hazard Mater. 2019 Nov 5:379:120797. doi: 10.1016/j.jhazmat.2019.120797. Epub 2019 Jun 19.

Authors

Shanye Yang¹, Qian Li², Liang Chen², Zhongshan Chen³, Zengxin Pu², Huihui Wang², Shujun Yu², Baowei Hu⁴, Jianrong Chen⁵, Xiangke Wang⁶

Affiliations

¹ MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China; School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, PR China.
² MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China.
³ MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China. Electronic address: zschen@ncepu.edu.cn.
⁴ School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, PR China. Electronic address: hbw@usx.edu.cn.
⁵ College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, PR China.
⁶ MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China; Hebei Key Lab of Power Plant Flue Gas Multi-pollutants Control, College of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, PR China. Electronic address: xkwang@ncepu.edu.cn.

PMID: 31252343
DOI: 10.1016/j.jhazmat.2019.120797

Abstract

In this investigation, two novel magnetic core-shell Fe₃O₄@MoS₂ (F@M) and MoS₂@Fe₃O₄ (M@F) composites were synthesized and exploited for Cr(VI) elimination. Eco-friendly preparation methods were applied for the synthesis of Fe₃O₄ and MoS₂ composites. The experimental results showed that both F@M and M@F have high saturation magnetization values (43.2 emu/g for F@M and 49.9 emu/g for M@F), excellent maximum sorption capacities of Cr(VI) at pH 5.0 and 298 K (324.3 mg/g for F@M, 290.2 mg/g for M@F), remarkable Cr(VI) removal efficiencies (Cr(VI) sorption equilibrium by both F@M and M@F can be reached in 90 min) and nice regeneration properties (the sorption capabilities of F@M and M@F decreased slightly after five consecutive sorption/desorption cycles). Chemical reduction of Cr(VI) to Cr(III) occurred on the surface of F@M and M@F, and the synergetic reduction of sulfur and ferrous ions made F@M an outstanding material for Cr(VI) removal. This paper highlights F@M and M@F as potential, eco-friendly and ultrahigh-efficiency materials for Cr(VI) pollution cleanup.

Keywords: Core-shell; Cr(VI); Magnetic composites; Sorption; Synergetic reduction.

Publication types

Research Support, Non-U.S. Gov't