Migration and arsenic adsorption study of starch-modified Fe-Ce oxide on   a silicon-based micromodel observation platform

doi:10.1016/j.jhazmat.2017.05.027

CORC > 北京大学 > 软件与微电子学院

	Migration and arsenic adsorption study of starch-modified Fe-Ce oxide on a silicon-based micromodel observation platform
	Lin, Longyong ; Yan, Xiulan ; Liao, Xiaoyong ; Wang, Zhenyu
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2017
关键词	Fe-Ce oxide Arsenic Porous soil Micromodel Laser-induced breakdown spectroscopy CONTAMINATED SOILS POROUS-MEDIA PORE-SCALE TRANSPORT NANOPARTICLES VISUALIZATION REMEDIATION GROUNDWATER AMENDMENTS
DOI	10.1016/j.jhazmat.2017.05.027
英文摘要	Iron materials have shown great potential to remediate arsenic (As) contaminated sites. It's very important to reveal the reaction process between iron materials and As from the perspective of pore scale, but relevant research was inadequate. In order to directly investigate the migration and As adsorption mechanism of starch-modified Fe-Ce oxide in pore scale, a silicon-based micromodel observation platform was established in this study. The results of Charge coupled Device images showed that the sedimentation surface area of SFC occupied about 57.02% of the large porosity zone, but only 23.27% of the small porosity zone. To further reveal the 3D distribution of Fe and As elements inside the pore network, Laser Induced Breakdown Spectroscopy was introduced. The results revealed that less As was adsorbed as less SFC intruded in the small porosity zone. When the large porosity zone was blocked by SFC, a permeability barrier was created to adsorb As from upstream. This study also explored the effect of particle size reduction on SFC migration, and found it might be a better candidate for more SFC penetrated into small porosity zone. Combined with various high-resolution and sensitivity-detection methodologies, more colloidal migration mechanisms can be investigated using this technology in the future. (C) 2017 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [41571309]; National High Technology Research and Development Program of China (863 Program) [2013AA06A206]; National Nature Science Foundation of China [41271339]; SCI(E); ARTICLE; 202-207; 338
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470867]
专题	软件与微电子学院
推荐引用方式 GB/T 7714	Lin, Longyong,Yan, Xiulan,Liao, Xiaoyong,et al. Migration and arsenic adsorption study of starch-modified Fe-Ce oxide on a silicon-based micromodel observation platform[J]. JOURNAL OF HAZARDOUS MATERIALS,2017.
APA	Lin, Longyong,Yan, Xiulan,Liao, Xiaoyong,&Wang, Zhenyu.(2017).Migration and arsenic adsorption study of starch-modified Fe-Ce oxide on a silicon-based micromodel observation platform.JOURNAL OF HAZARDOUS MATERIALS.
MLA	Lin, Longyong,et al."Migration and arsenic adsorption study of starch-modified Fe-Ce oxide on a silicon-based micromodel observation platform".JOURNAL OF HAZARDOUS MATERIALS (2017).