Different stabilities of multiwalled carbon nanotubes in fresh surface water samples

被引：81

作者：

Lin, Daohui ^{[1
]}

Liu, Ni ^{[1
]}

Yang, Kun ^{[1
]}

Xing, Baoshan ^{[2
]}

Wu, Fengchang ^{[3
]}

机构：

[1] Zhejiang Univ, Dept Environm Sci, Hangzhou 310028, Peoples R China

[2] Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA

[3] Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2010年 / 158卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Nanomaterial; Surfactant; Environmental behavior; Dissolved organic matter; NATURAL ORGANIC-MATTER; PULMONARY TOXICITY; DISPERSION; NANOPARTICLES; SUSPENSIONS; ADSORPTION; NANOMATERIALS; AGGREGATION; ENVIRONMENT; KINETICS;

D O I：

10.1016/j.envpol.2010.01.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The stability of multiwalled carbon nanotubes (MWNTs) in particulate aggregates and surfactant-facilitated suspensions after being mixed into eight types of fresh surface water samples was investigated. MWNTs in particulate aggregates could not be stabilized in any of the water samples except for the one having relatively high content of dissolved organic matter with the aid of sonication. Sodium dodecyl benzenesulfonate (SDBS), polyethylene glycol octylphenyl ether (TX100) and cetyltrimethyl ammonium bromide (CTAB) were used to prepare MWNT suspensions. SDBS- and TX100-stabilized MWNTs could partly remain suspending after being mixed into the water samples, whereas CTAB-stabilized MWNTs readily sedimentated due to the surface charge neutralization by the surface water contained negatively-charged anions and colloids. This is a first systematic study examining the stability of carbon nanotubes in natural surface waters, the results from which will be useful for understanding the transport, fate and ecological effect of carbon nanotubes in the aqueous environment (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1270 / 1274

页数：5

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