Release of silver nanoparticles from outdoor facades

被引：415

作者：

Kaegi, Ralf ^{[1
]}

Sinnet, Brian ^{[1
]}

Zuleeg, Steffen ^{[1
]}

Hagendorfer, Harald ^{[2
]}

Mueller, Elisabeth ^{[3
]}

Vonbank, Roger ^{[2
]}

Boller, Markus ^{[1
]}

Burkhardt, Michael ^{[1
]}

机构：

[1] Eawag, Swiss Fed Inst Aquat Sci & Technol, CH-8600 Dubendorf, Switzerland

[2] Empa, Swiss Fed Inst Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[3] Elect Microscopy ETH Zurich EMEZ, CH-8093 Zurich, Switzerland

来源：

ENVIRONMENTAL POLLUTION | 2010年 / 158卷 / 09期

关键词：

Silver nanoparticles; Exterior paints; Electron microscopy; Urban storm water runoff; ANTIBACTERIAL ACTIVITY; HYDROGEN-SULFIDE; ESCHERICHIA-COLI; ENVIRONMENT; TRANSPORT; TOXICITY; EXPOSURE; COLLOIDS; MODEL;

D O I：

10.1016/j.envpol.2010.06.009

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study we investigate the release of metallic silver nanoparticles (Ag-NP) from paints used for outdoor applications. A facade panel mounted on a model house was exposed to ambient weather conditions over a period of one year. The runoff volume of individual rain events was determined and the silver and titanium concentrations of 36 out of 65 runoff events were measured. Selected samples were prepared for electron microscopic analysis. A strong leaching of the Ag-NP was observed during the initial runoff events with a maximum concentration of 145 mu Ag/l. After a period of one year, more than 30% of the Ag-NP were released to the environment. Particles were mostly <15 nm and are released as composite colloids attached to the organic binders of the paint. Microscopic results indicate that the Ag-NP are likely transformed to considerably less toxic forms such as Ag(2)S. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2900 / 2905

页数：6

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