期刊
CHEMOSPHERE
卷 139, 期 -, 页码 240-245出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2015.06.045
关键词
Copper nanoparticles; XANES; Soil; Enchytraeus crypticus; Oligochaeta
资金
- FEDER through COMPETE-Programa Operacional Factores de Competitividade
- National funding through FCT-Fundacao para a Ciencia e Tecnologia, within the research project NANOkA [FCOMP-01-0124- FEDER-008944, FCT PTDC/BIA-BEC/103716/2008]
- FCT PhD grant [SFRH/BD/63261/2009]
- Nordic Council Grant project [1928 (1599)]
- FP7 project MARINA [263215]
- FP7 project SUN [604305]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/63261/2009] Funding Source: FCT
The nano-form of copper (Cu-NPs) is already extensively used. In this paper the toxic effect of Cu in the worm Enchytraeus crypticus (Oligochaeta: Enchytraeidae) was assessed following exposure to (1) Cu-salt: freshly spiked soil with copper-nitrate, (2) Cu-NPs: freshly spiked soil with Cu nanoparticles (80 nm), and (3) Cu-field: historically Cu contaminated soil (80 years ago). Our main aims were to compare the three different exposure regimes and respective toxicity, and to determine how the oxidation state of the Cu and dissolution state of the particles differed. Characterization of in situ-exposure included identification of oxidation states with synchrotron generated X-ray absorption near-edge spectroscopy (XANES) analysis, activity of free Cu2+ in soil-solution (Ion Selective Electrode), and the relative distribution of the labile Cu-fractions (Sequential Extraction). Freshly spiked Cu-salt was the most toxic for reproductive output of the worms, followed by Cu-NPs and then Cu-field. XANES indicated only one oxidation state (II) in Cu-salt and Cu-field soil, whereas in Cu-NPs soil it was present in all oxidation states (0, I and II). The partial oxidation of the Cu-NPs (in soil) was evident and with limited dissolution. (C) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据