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

文献类型：期刊论文

作者Duan, Ruiqi1,2,3; Dong, Yanhui1,2,3; Zhang, Qian1,2,3
刊名WATER
出版日期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
DOI10.3390/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.
WOS关键词NANOPARTICLES ; MOBILITY
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研究方向Water Resources
语种英语
WOS记录号WOS:000462219200001
出版者MDPI
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
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.

入库方式： OAI收割

来源：地质与地球物理研究所

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