CCPortal
DOI10.1016/j.jhydrol.2014.09.053
Laboratory assessment of the mobility of water-dispersed engineered nanoparticles in a red soil (Ultisol)
Wang, Dengjun1,4; Su, Chunming2; Zhang, Wei3; Hao, Xiuzhen1; Cang, Long1; Wang, Yujun1; Zhou, Dongmei1
发表日期2014-11-27
ISSN0022-1694
卷号519页码:1677-1687
英文摘要

Soils are major sinks of engineered nanoparticles (ENPs) as results of land applications of sewage sludge, accidental spills, or deliberate applications of ENPs (e.g., nano-pesticides). In this study, the transport behaviors of four widely used ENPs (i.e., titanium dioxide [TiO2], buckminsterfullerene [C-60], single-walled carbon nanotube [SWNT], and elemental silver [Ag-0]) were investigated in water-saturated columns packed with either a quartz sand, a red soil (Ultisol), or sand/soil mixtures with soil mass fraction (lambda) from 0% to 100% at slightly acidic solution pH (4.0-5.0). The mobility of tested ENPs decreased significantly with increasing lambda, which was attributed to increased surface area and/or retention sites imparted by iron oxides, clay minerals, and organic matter in the red soil. Breakthrough curves of all ENPs exhibited blocking effects (decreasing deposition rate over time) and were well-described using an unfavorable and favorable, two-site kinetic attachment model accounting for random sequential adsorption on the favorable site. Modeled maximum retention capacity and first-order attachment rate coefficient on the favorable site both increased linearly with increasing lambda, suggesting that transport parameters of ENPs in natural soils may be accurately extrapolated from transport parameters in the sand/soil mixtures. In addition, the mobility of three negatively charged ENPs (C-60, SWNT, and Ag-0 NPs) was reversely correlated with their average hydrodynamic diameters, highlighting that the average hydrodynamic diameter of negatively charged ENPs is the dominant physicochemical characteristics controlling their mobility in the Ultisol. (C) 2014 Elsevier B.V. All rights reserved.


英文关键词Engineered nanoparticle;Red soil;Ultisol;Transport;Modeling;Porous media
语种英语
WOS记录号WOS:000347018100036
来源期刊JOURNAL OF HYDROLOGY
来源机构美国环保署
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/60417
作者单位1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China;
2.US EPA, Ground Water & Ecosyst Restorat Div, Natl Risk Management Res Lab, Off Res & Dev, Ada, OK 74820 USA;
3.Michigan State Univ, Dept Plant Soil & Microbial Sci, Environm Sci & Policy Program, E Lansing, MI 48824 USA;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Wang, Dengjun,Su, Chunming,Zhang, Wei,et al. Laboratory assessment of the mobility of water-dispersed engineered nanoparticles in a red soil (Ultisol)[J]. 美国环保署,2014,519:1677-1687.
APA Wang, Dengjun.,Su, Chunming.,Zhang, Wei.,Hao, Xiuzhen.,Cang, Long.,...&Zhou, Dongmei.(2014).Laboratory assessment of the mobility of water-dispersed engineered nanoparticles in a red soil (Ultisol).JOURNAL OF HYDROLOGY,519,1677-1687.
MLA Wang, Dengjun,et al."Laboratory assessment of the mobility of water-dispersed engineered nanoparticles in a red soil (Ultisol)".JOURNAL OF HYDROLOGY 519(2014):1677-1687.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Wang, Dengjun]的文章
[Su, Chunming]的文章
[Zhang, Wei]的文章
百度学术
百度学术中相似的文章
[Wang, Dengjun]的文章
[Su, Chunming]的文章
[Zhang, Wei]的文章
必应学术
必应学术中相似的文章
[Wang, Dengjun]的文章
[Su, Chunming]的文章
[Zhang, Wei]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。