Synthetic TiO2 nanoparticle emission from exterior facades into the aquatic environment

被引：626

作者：

Kaegi, R. ^{[1
]}

Ulrich, A. ^{[2
]}

Sinnet, B. ^{[1
]}

Vonbank, R. ^{[2
]}

Wichser, A. ^{[2
]}

Zuleeg, S. ^{[1
]}

Simmler, H. ^{[2
]}

Brunner, S. ^{[2
]}

Vonmont, H. ^{[2
]}

Burkhardt, M. ^{[1
]}

Boller, M. ^{[1
]}

机构：

[1] Eawag, CH-8600 Dubendorf, Switzerland

[2] Empa, CH-8600 Dubendorf, Switzerland

来源：

ENVIRONMENTAL POLLUTION | 2008年 / 156卷 / 02期

关键词：

Synthetic TiO2; Aquatic environment; Electron microscopy; Exterior paints;

D O I：

10.1016/j.envpol.2008.08.004

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We present direct evidence of the release of synthetic nanoparticles from urban applications into the aquatic environment. We investigated TiO2 particles as these particles are used in large quantities in exterior paints as whitening pigments and are to some extent also present in the nano-size range. TiO2 particles were traced from exterior facade paints to the discharge into Surface waters. We Used a centrifugation based sample preparation which recovers TiO2 particles between roughly 20 and 300 nm. Analytical electron microscopy revealed that TiO2 particles are detached from new and aged facade paints by natural weather conditions and are then transported by facade runoff and are discharged into natural, receiving waters. Microscopic investigations are confirmed by bulk chemical analysis. By combining results from microscopic investigations with bulk chemical analysis we calculated the number densities of synthetic TiO2 particles in the runoff. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：233 / 239

页数：7

共 43 条

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