Foam-Assisted Delivery of Nanoscale Zero Valent Iron in Porous Media

doi:10.1061/(ASCE)EE.1943-7870.0000727

CORC > 北京大学 > 城市与环境学院

	Foam-Assisted Delivery of Nanoscale Zero Valent Iron in Porous Media
	Ding, Yuanzhao ; Liu, Bo ; Shen, Xin ; Zhong, Lirong ; Li, Xiqing
刊名	journal of environmental engineering
	2013
关键词	Foam Delivery Nanoscale zero valent iron (nZVI) Vadose zone Porous media CONTAMINATED SOIL SURFACTANT FOAM RHAMNOLIPID FOAM VADOSE ZONE REMEDIATION PARTICLES NANOPARTICLES GROUNDWATER FILTRATION SEDIMENTS
DOI	10.1061/(ASCE)EE.1943-7870.0000727
英文摘要	Foam is potentially a promising vehicle to deliver nanoparticles for vadose-zone remediation because foam can overcome the intrinsic problems associated with solution-based delivery, such as preferential flow and contaminant mobilization and spreading. In this work, the feasibility of using foam to deliver nanoscale zero valent iron (nZVI) in unsaturated porous media was investigated. Foam generated using the surfactant sodium lauryl ether sulfate (SLES) showed excellent ability to carry nZVI. SLES and nZVI concentrations in the foaming solutions did not affect the percentages of nZVI concentrations in foam relative to nZVI concentrations in the solutions. When foams carrying nZVI were injected through the unsaturated columns, the fractions of nZVI exiting the column were much higher than those when nZVI was injected with liquid. The enhanced nZVI transport implies that foam delivery could significantly increase the radius of influence of injected nZVI. The type and concentrations of surfactants and the influent nZVI concentrations did not noticeably affect nZVI transport during foam delivery. In contrast, nZVI retention increased considerably as the grain size of porous media decreased. Oxidation of foam-delivered nZVI due to oxygen diffusion into unsaturated porous media was visually examined in flow cell texts. It was demonstrated that if foam is injected to cover a deep vadose-zone layer, oxidation would only cause a small fraction of foam-delivered nZVI to be oxidized before it reacts with contaminants.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000322961500008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Environmental; Engineering, Civil; Environmental Sciences; SCI(E); EI; 1; ARTICLE; 9; 1206-1212; 139
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/322244]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Ding, Yuanzhao,Liu, Bo,Shen, Xin,et al. Foam-Assisted Delivery of Nanoscale Zero Valent Iron in Porous Media[J]. journal of environmental engineering,2013.
APA	Ding, Yuanzhao,Liu, Bo,Shen, Xin,Zhong, Lirong,&Li, Xiqing.(2013).Foam-Assisted Delivery of Nanoscale Zero Valent Iron in Porous Media.journal of environmental engineering.
MLA	Ding, Yuanzhao,et al."Foam-Assisted Delivery of Nanoscale Zero Valent Iron in Porous Media".journal of environmental engineering (2013).