gchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2019.01.055
Scopus ID: 2-s2.0-85061640770
Title:
Effects of hydrophobicity of titanium dioxide nanoparticles and exposure scenarios on copper uptake and toxicity in Daphnia magna
Author: Liu S.; Cui M.; Li X.; Thuyet D.Q.; Fan W.
Source Publication: Water Research
ISSN: 431354
Indexed By: SCI ; SCI-E ; EI
Publishing Year: 2019
Volume: 154
pages begin: 162
pages end: 170
Language: 英语
Keyword: Acute toxicity ; Copper ; Daphnia magna ; Hydrophobicity ; Titanium dioxide nanoparticles
English Abstract: Titanium dioxide (TiO 2 ) nanoparticles (NPs) encounter heavy metals in the environment under different scenarios. However, the mechanism of their joint toxicity effects on Daphnia magna remains vague. This study assessed the effects of hydrophobicity of TiO 2 NPs (TDONPs) and exposure scenarios on copper uptake and toxicity in Daphnia magna. In the individual exposure scenario, hydrophilic and hydrophobic TDONPs both showed no acute toxicity to Daphnia magna, whereas individual Cu 2+ exposure resulted in a 30% mortality rate. Co-exposure and sequential exposure to the two types of TDONP and Cu 2+ resulted in mortality rates of 40%–50%. The mechanisms of the increased Cu 2+ toxicity caused by hydrophilic and hydrophobic TDONP were different. In the presence of hydrophobic TDONPs, the Cu toxicity could be attributed to the increased bioaccumulation of Cu and Ti, leading to high oxidative stress injury. The Cu toxicity due to hydrophilic TDONPs could be induced by intensified intestinal membrane damage. The obtained data suggest that the hydrophobicity of the TDONPs plays a critical role in regulating the toxicity of Cu 2+ . © 2019 Elsevier Ltd
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Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/121952
Appears in Collections:气候变化事实与影响

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Affiliation: Department of Environmental Science and Engineering, School of Space and Environment, Beihang UniversityBeijing 100191, China; Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang UniversityBeijing 100191, China; Earth & Planetary Sciences, Johns Hopkins University, Baltimore, MD 21211, United States; Institute of Agricultural Machinery, National Agriculture and Food Research Organization, 1-40-2 Nisshin, Kita-ku, Saitama City, Saitama 331-8537, Japan

Recommended Citation:
Liu S.,Cui M.,Li X.,et al. Effects of hydrophobicity of titanium dioxide nanoparticles and exposure scenarios on copper uptake and toxicity in Daphnia magna[J]. Water Research,2019-01-01,154
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