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To duckweeds (Landoltia punctata), nanoparticulate copper oxide is more inhibitory than the soluble copper in the bulk solution.
- Source :
-
Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2011 May; Vol. 159 (5), pp. 1277-82. Date of Electronic Publication: 2011 Feb 18. - Publication Year :
- 2011
-
Abstract
- CuO nanoparticles (CuO-NP) were synthesized in a hydrogen diffusion flame. Particle size and morphology were characterized using scanning mobility particle sizing, Brunauer-Emmett-Teller analysis, dynamic light scattering, and transmission electron microscopy. The solubility of CuO-NP varied with both pH and presence of other ions. CuO-NP and comparable doses of soluble Cu were applied to duckweeds, Landoltia punctata. Growth was inhibited 50% by either 0.6 mg L(-1) soluble copper or by 1.0 mg L(-1) CuO-NP that released only 0.16 mg L(-1) soluble Cu into growth medium. A significant decrease of chlorophyll was observed in plants stressed by 1.0 mg L(-1) CuO-NP, but not in the comparable 0.2 mg L(-1) soluble Cu treatment. The Cu content of fronds exposed to CuO-NP is four times higher than in fronds exposed to an equivalent dose of soluble copper, and this is enough to explain the inhibitory effects on growth and chlorophyll content.<br /> (Copyright © 2011 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1873-6424
- Volume :
- 159
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Environmental pollution (Barking, Essex : 1987)
- Publication Type :
- Academic Journal
- Accession number :
- 21333422
- Full Text :
- https://doi.org/10.1016/j.envpol.2011.01.028