Imaging of engineered nanopartlicles and their aggregates under fully liquid conditions in environmental matrices

被引：49

作者：

Tiede, Karen ^{[1
,2
]}

Tear, Steven P. ^{[3
]}

David, Helen ^{[4
]}

Boxall, Alistair B. A. ^{[1
,2
]}

机构：

[1] Food & Environm Res Agcy, York YO41 1LZ, N Yorkshire, England

[2] Univ York, Dept Environm, York YO10 5DD, N Yorkshire, England

[3] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[4] SEAC Unilever, Sharnbrook MK44 1LQ, Beds, England

来源：

WATER RESEARCH | 2009年 / 43卷 / 13期

关键词：

Scanning electron microscopy; Aquatic systems; Sample preparation; Capsules; WetSEM (TM); Wet imaging; SCANNING-ELECTRON-MICROSCOPY; WET SEM; NANOPARTICLES; WATER; RISK; NANOMATERIALS; PARTICLES; CELLS;

D O I：

10.1016/j.watres.2009.04.045

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The increasing industrial production of engineered nanoparticles (ENPs) raises concern over their safety to humans and the environment. There is a lack of knowledge regarding the environmental fate and impact of ENPs and in situ methods are needed to investigate e.g. nanoparticle aggregation and adsorption in the media of concern such as water, sediment and soil. In this study, the application of wet scanning electron microscopy (WetSEM (TM)) technology in combination with energy dispersive x-ray spectroscopy (EDS) to visualise and elementally identify metal and metal oxide nanoparticles (Au, TiO2, ZnO and Fe2O3) under fully liquid conditions in distilled and lake water as well as in a soil suspension has been investigated. WetSEM (TM) capsules comprise an electron transparent membrane enabling the imaging and EDS analysis of liquid samples. Results are compared with conventional SEM images and show that WetSEM (TM)/EDS is a promising complementary tool for the in situ investigation of ENPs and their aggregates in natural matrices. In combination with other analytical tools (e.g. HDC- or FFF-ICP-MS, DLS), WetSEM (TM) could help to provide a better understanding of the fate and behaviour of ENPs in the environment. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.

引用

页码：3335 / 3343

页数：9

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