Influence of gravity on transport and retention of representative engineered nanoparticles in quartz sand

doi:10.1016/j.jconhyd.2015.02.005

CORC > 北京大学 > 环境科学与工程学院

	Influence of gravity on transport and retention of representative engineered nanoparticles in quartz sand
	Cai Li ; Zhu Jinghan ; Hou Yanglong ; Tong Meiping ; Kim Hyunjung
刊名	污染物水文学杂志
	2015
关键词	Engineered nanoparticle,Gravity,Quartz sand,Retention,Transport
DOI	10.1016/j.jconhyd.2015.02.005
英文摘要	Four types of NPs: carbon nanotubes and graphene oxide (carbon-based NPs), titanium dioxide and zinc oxide metal-oxide NPs, were utilized to systematically determine the influence of gravity on the transport of NPs in porous media. Packed column experiments for two types of carbon-based NPs were performed under unfavorable conditions in both up-flow (gravity-negative) and down-flow (gravity-positive) orientations, while for two types of metal-oxide NPs, experiments were performed under both unfavorable and favorable conditions in both up-flow and down-flow orientations. Both breakthrough curves and retained profiles of two types of carbon-based NPs in up-flow orientation were equivalent to those in down-flow orientation, indicating that gravity had negligible effect on the transport and retention of carbon-based NPs under unfavorable conditions. In contrast, under both unfavorable and favorable conditions, the breakthrough curves for two types of metal-oxide NPs in down-flow orientation were lower relative to those in up-flow orientation, indicating that gravity could decrease the transport of metal-oxide NPs in porous media. The distinct effect of gravity on the transport and retention of carbon-based and metal-oxide NPs was mainly attributed to the contribution of gravity to the force balance on the NPs in quartz sand. The contribution of gravity was determined by the interplay of the density and sizes of NP aggregates under examined solution conditions.Copyright ? 2015 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000362918600013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); PubMed; 5; ARTICLE; tongmeiping@pku.edu.cn; kshjkim@jbnu.ac.kr
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/188467]
专题	环境科学与工程学院工学院
推荐引用方式 GB/T 7714	Cai Li,Zhu Jinghan,Hou Yanglong,et al. Influence of gravity on transport and retention of representative engineered nanoparticles in quartz sand[J]. 污染物水文学杂志,2015.
APA	Cai Li,Zhu Jinghan,Hou Yanglong,Tong Meiping,&Kim Hyunjung.(2015).Influence of gravity on transport and retention of representative engineered nanoparticles in quartz sand.污染物水文学杂志.
MLA	Cai Li,et al."Influence of gravity on transport and retention of representative engineered nanoparticles in quartz sand".污染物水文学杂志 (2015).