Influence of nanoparticle doping on the colloidal stability and toxicity of copper oxide nanoparticles in synthetic and natural waters

Water Research
Adeyemi S AdeleyeArturo A Keller

Abstract

Engineered nanoparticles (NPs) are often doped with other elements to improve their functionality and, at times, physical and/or chemical stability. However, the effect of doping on the environmental implications of NPs is not well-understood. We investigated the colloidal stability and effects of CuO NPs doped with Fe (0-10%). Colloidal stability of the Fe-doped CuO NPs in aqueous media, as determined by critical coagulation concentrations of NaCl, decreased with increased Fe-doping. However, decrease in the overall particle density led to slower sedimentation of Fe-doped CuO NPs than would have been predicted from their aggregation behavior. Fe-doping significantly affected CuO dissolution (p < .001), promoting Cu leaching out from the doped NPs due to increased reactivity at neutral pH and increased surface area with Fe-doping. Fe-doping did not increase the toxicity of CuO to a marine phytoplankton, Isochrysis galbana, despite promoting ionic Cu release. Total suspended Cu was dominated by dissolved Cu complexes in seawater and particulate Cu in freshwater. Based on the abundance of different size fractions analyzed in freshwater, the particles detected in water suspension were mostly (≥50%) larger than 200 nm in diameter. ...Continue Reading

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Jul 10, 2016·Water Research·Adeyemi S AdeleyeArturo A Keller

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Citations

Apr 11, 2018·Environmental Toxicology and Chemistry·Jamie R LeadKristin Schirmer
Jan 1, 2018·Journal of Nanoparticle Research : an Interdisciplinary Forum for Nanoscale Science and Technology·Chang Min ParkChunming Su
Jan 31, 2020·Neurochemical Research·Arundhati JoshiRalf Dringen
Jan 6, 2021·International Journal of Molecular Sciences·Wided Najahi-MissaouiBrian S Cummings
Oct 3, 2018·Ecotoxicology and Environmental Safety·Ruth HwangTian Xia
Mar 22, 2021·Journal of Environmental Sciences (China)·Hongyan SunDongsheng Wang
Apr 8, 2021·Environmental Technology·Taynara Basso VidovixAngélica Marquetotti Salcedo Vieira

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