Chronic dosing of a simulated pond ecosystem in indoor aquatic mesocosms: fate and transport of CeO2 nanoparticles

被引：49
|
作者：
Tella, M. [1 ,2 ]
Auffan, M. [1 ,2 ]
Brousset, L. [2 ,3 ]
Morel, E. [1 ]
Proux, O. [4 ]
Chaneac, C. [2 ,5 ]
Angeletti, B. [1 ,2 ]
Pailles, C. [1 ,2 ]
Artells, E. [2 ,3 ]
Santaella, C. [2 ,6 ]
Rose, J. [1 ,2 ]
Thiery, A. [2 ,3 ]
Bottero, J. -Y. [1 ,2 ]
机构：
[1] Aix Marseille Univ, CNRS, IRD, CEREGE UM34,UMR 7330, F-13545 Aix En Provence, France
[2] Int Consortium Environm Implicat Nanotechnol iCEI, Aix En Provence, France
[3] Aix Marseille Univ, Inst Mediterraneen Biodiversite & Ecol Marine & C, F-13331 Marseille, France
[4] Univ Grenoble 1, Observ Sci Univ Grenoble, CNRS, UMS 832, F-38041 Grenoble, France
[5] Univ Paris 06, CNRS, Coll France, Chim Matiere Condensee Paris,UMR 7574, F-75231 Paris, France
[6] Aix Marseille Univ, CNRS, CEA,Cadarache DSV IBEB SBVME,IBEB, Lab Ecol Microb Rhizosphere & Environ Extrem LEMi, St Paul Les Durance, France
来源：
ENVIRONMENTAL SCIENCE-NANO | 2015年 / 2卷 / 06期
关键词：
TITANIUM-DIOXIDE NANOPARTICLES; FRESH-WATER; HETEROAGGREGATION; TRANSFORMATION; SPECTROSCOPY; OXIDE; RISK;
D O I：
10.1039/c5en00092k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Indoor aquatic mesocosms were designed to mimic pond ecosystems contaminated by a continuous point-source discharge of cerium oxide nanoparticles (CeO2-NPs). Bare and citrate-coated CeO2-NPs exhibited different chemical and colloidal behaviors in the aquatic mesocosms. Bare CeO2-NPs were chemically stable but quickly homo-aggregated and settled out of the water column. Citrate-coated NPs both homo-and hetero-aggregated but only after the several days required to degrade the citrate coating. While they were more stable as a colloidal suspension, coated CeO2-NPs dissolved faster due to surface complexation with citrate, which resulted in the release of dissolved Ce into the water column. The different distributions over time between water/sediment or dissolved/particulate forms of Ce controlled the availability of Ce to benthic grazers (mollusk Planorbarius corneus) and planktonic filter feeders (copepod Eudiaptomus vulgaris).
引用
收藏
页码：653 / 663
页数：11
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