Document Type
Article
Language
eng
Format of Original
6 p.
Publication Date
5-2011
Publisher
Elsevier
Source Publication
Environmental Pollution
Source ISSN
0269-7491
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.
Recommended Citation
Shi, Jiyan; Abid, Aamir D.; Kennedy, Ian M.; Hristova, Krassimira R.; and Silk, Wendy K., "To Duckweeds (Landoltia punctata), Nanoparticulate Copper Oxide is More Inhibitory than the Soluble Copper in the Bulk Solution" (2011). Biological Sciences Faculty Research and Publications. 382.
https://epublications.marquette.edu/bio_fac/382
Comments
NOTICE: this is the author’s version of a work that was accepted for publication in Environmental Pollution. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Environmental Pollution, Vol. 159, No. 5 (May 2011): 1277–1282. DOI. © 2011 Elsevier. Used with permission.