文献类型：期刊文献

英文题名：Yolk-shell Fe/FeS@SiO2 particles with enhanced dispersibility, transportability and degradation of TBBPA

作者：Ren, Luyao[1]; Li, Liangzhong[1,2]; Chen, Shuai[4]; Li, Hui[1,3]; Liu, Yongdi[1]; Zhou, Liyang[1]; Guo, Su[2]; Yu, YunJiang[2]

机构：[1] State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, Center for Environmental Health Research, South China Institute of Environmental Sciences, The Ministry of Environment Protection of PRC, Guangzhou, 510535, China; [3] Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; [4] Research Center of Resource Recycling Science and Engineering, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai, 201209, China

年份：2019

起止页码：2

外文期刊名：Catalysis Today

收录：EI(收录号：20184406006672)

语种：英文

外文关键词：Groundwater - High resolution transmission electron microscopy - Scanning electron microscopy - Remediation - Suspensions (fluids) - X ray photoelectron spectroscopy - Mesoporous materials

摘要：In this study, Fe/FeS@SiO2 yolk-shell particles (Fe/FeS@SiO2 YSPs) were synthesized, characterized, and applied to tetrabromobisphenol A (TBBPA) removal in simulated groundwater. The X-ray photoelectron spectroscopy, X-ray diffraction, Scanning electron microscopy, transmission electron microscopy and Brunauer Emmett Teller results revealed that Fe/FeS@SiO2 YSPs possess special structures, including active cores, mesoporous networks, shells, hollow cavities and a large surface area (85 m2/g vs. 8 m2/g) compared to Fe/FeS. The mobility of the synthesized particles in porous media was simulated with sand column experiments. Fe/FeS@SiO2 YSPs showed a much better transportability (83.02% of particles successfully transported through the column) than Fe/FeS particles (only 1.68%), related to the better suspension stability and much lower particle surface charge (?22.7 mV vs. ?7.6 mV) at neutral pH. Improved TBBPA reduction performance in synthetic solution was observed for Fe/FeS@SiO2 YSPs over bare Fe/FeS. The transformation pathway of TBBPA was studied in detail, revealing the formation of tri-BBPA, di-BBPA, mono-BBPA and BPA as the main products. In brief, thanks to the hollow mesoporous silica spheres (HMSS) coated on the surface of Fe/FeS particles, Fe/FeS@SiO2 YSPs showed an enhanced dispersibility, transportability and degradation of TBBPA in simulated groundwater. The results in this study proved that Fe/FeS@SiO2 YSPs are a promising material for in situ remediation of TBBPA in soil and groundwater. ? 2019 Elsevier B.V.