Characteristics of Aggregate Size Distribution of Nanoscale Zero-Valent Iron in Aqueous Suspensions and Its Effect on Transport Process in Porous Media

doi:10.3390/w10060670

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院页岩气与地质工程重点实验室

	Characteristics of Aggregate Size Distribution of Nanoscale Zero-Valent Iron in Aqueous Suspensions and Its Effect on Transport Process in Porous Media
	Duan, Ruiqi 1,2,3; Dong, Yanhui 1,2,3; Zhang, Qian 1,2,3
刊名	WATER
	2018-06-01
卷号	10 期号:6 页码:14
关键词	NZVI aggregate size distribution multi-sized transport
ISSN号	2073-4441
DOI	10.3390/w10060670
英文摘要	Bare nanoscale zero-valent iron (NZVI) particles in aqueous suspensions aggregate into micron to submicron sizes. The transport process of enlarged aggregates or multi-sized aggregates is different from that of nanoparticles. In this work, we performed aggregate size distribution analysis of NZVI suspension using a laser grain size analyzer and conducted a series of continuous injection column experiments with different injected NZVI concentrations. The results show that aggregates in NZVI suspensions range from submicron to submillimeter size and are mainly distributed around 5-9 mu m and 50-100 mu m. Quantitative calculation of iron transport and retention showed that the retained iron linearly correlates with injected concentration. The cross-section images revealed that clogging weakened from inlet to outlet. Furthermore, larger aggregates (> 40 mu m) appeared more often in the rising-declining stages of breakthrough curves, whereas small aggregates (< 30 mu m) dominated the steady stage. Indeed, relatively preferential flow facilitated the transport and discharge of both large and small iron aggregates. Straining of glass beads especially for the large iron aggregates resulted in a decline in breakthrough. Moreover, the blocking of attached and plugged iron prevented later retention of iron, resulting in a certain concentration of iron in the effluents. Our study provides greater insight into the transport of NZVI.
资助项目	Natural Science Foundation of Beijing[8162042] ; Natural Science Foundation of Beijing[8174077] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB10030601] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2016063]
WOS关键词	NANOPARTICLES ; MOBILITY
WOS研究方向	Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000462219200001
资助机构	Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Natural Science Foundation of Beijing ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90917]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	Dong, Yanhui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Duan, Ruiqi,Dong, Yanhui,Zhang, Qian. Characteristics of Aggregate Size Distribution of Nanoscale Zero-Valent Iron in Aqueous Suspensions and Its Effect on Transport Process in Porous Media[J]. WATER,2018,10(6):14.
APA	Duan, Ruiqi,Dong, Yanhui,&Zhang, Qian.(2018).Characteristics of Aggregate Size Distribution of Nanoscale Zero-Valent Iron in Aqueous Suspensions and Its Effect on Transport Process in Porous Media.WATER,10(6),14.
MLA	Duan, Ruiqi,et al."Characteristics of Aggregate Size Distribution of Nanoscale Zero-Valent Iron in Aqueous Suspensions and Its Effect on Transport Process in Porous Media".WATER 10.6(2018):14.