共 42 条
Toxicity and Internalization of CuO Nanoparticles to Prokaryotic Alga Microcystis aeruginosa as Affected by Dissolved Organic Matter
被引:319
作者:

Wang, Zhenyu
论文数: 0 引用数: 0
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机构:
Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA
Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA

Li, Jing
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h-index: 0
机构:
Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA

Zhao, Jian
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h-index: 0
机构:
Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA
Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA

Xing, Baoshan
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h-index: 0
机构:
Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA
机构:
[1] Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA
[2] Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China
基金:
中国国家自然科学基金;
关键词:
BULK ZNO;
PSEUDOKIRCHNERIELLA-SUBCAPITATA;
GROWTH-INHIBITION;
OXIDATIVE STRESS;
CARBON NANOTUBES;
COPPER TOXICITY;
TIO2;
CYTOTOXICITY;
ECOTOXICITY;
ADSORPTION;
D O I:
10.1021/es2010573
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
This is the first study investigating the toxicity of nanoparticles (NPs) to algae in the presence of dissolved organic matter (DOM). Suwannee river fulvic acid (SRFA), a type of DOM, could significantly increase the toxicity of CuO NPs to prokaryotic alga Microcystis aeruginosa. Internalization of CuO NPs was observed for the first time in the intact algal cells using high resolution transmission electron microscopy (HRTEM), and the cell uptake was enhanced by SRFA. A fast Fourier transformation (FFT)/inversed FFT (IFFT) process revealed that a main form of intracellular NPs was Cu2O, and an intracellular environment may reduce CuO into Cu2O. The internalization behavior alone did not seem to pose a hazard to membrane integrity as shown from the flow cytometry data. Elevated CuO nanotoxicity by SRFA was related to a combination of a lesser degree of aggregation, higher Cu2+ release, and enhanced internalization of CuO NPs.
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收藏
页码:6032 / 6040
页数:9
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