Journal article
Comparative environmental fate and toxicity of copper nanomaterials
NanoImpact, v 7, pp 28-40
01 Jul 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Given increasing use of copper-based nanomaterials, particularly in applications with direct release, it is imperative to understand their human and ecological risks. A comprehensive and systematic approach was used to determine toxicity and fate of several Cu nanoparticles (Cu NPs). When used as pesticides in agriculture, Cu NPs effectively control pests. However, even at low (5-20 mg Cu/plant) doses, there are metabolic effects due to the accumulation of Cu and generation of reactive oxygen species (ROS). Embedded in antifouling paints, Cu NPs are released as dissolved Cu+2 and in nano-and micron-scale particles. Once released, Cu NPs can rapidly (hours to weeks) oxidize, dissolve, and form CuS and other insoluble Cu compounds, depending on water chemistry (e.g. salinity, alkalinity, organic matter content, presence of sulfide and other complexing ions). More than 95% of Cu released into the environment will enter soil and aquatic sediments, where it may accumulate to potentially toxic levels (> 50-500 mu g/L). Toxicity of Cu compounds was generally ranked by high throughput assays as: Cu+2 > nano Cu(0) > nano Cu(OH) 2 > nano CuO > micron-scale Cu compounds. In addition to ROS generation, Cu NPs can damage DNA plasmids and affect embryo hatching enzymes. Toxic effects are observed at much lower concentrations for aquatic organisms, particularly freshwater daphnids and marine amphipods, than for terrestrial organisms. This knowledge will serve to predict environmental risks, assess impacts, and develop approaches to mitigate harm while promoting beneficial uses of Cu NPs.
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Details
- Title
- Comparative environmental fate and toxicity of copper nanomaterials
- Creators
- Arturo A. Keller - University of California, Santa BarbaraAdeyemi S. Adeleye - University of California, Santa BarbaraJon R. Conway - University of California, Santa BarbaraKendra L. Garner - University of California, Santa BarbaraLijuan Zhao - University of California, Santa BarbaraGary N. Cherr - Bay InstituteJie Hong - The University of Texas at El PasoJorge L. Gardea-Torresdey - Univ Calif Los Angeles, Calif NanoSyst Inst, Univ Calif Ctr Environm Implicat Nanotechnol, Los Angeles, CA 90095 USAHilary A. Godwin - California NanoSystems InstituteShannon Hanna - University of California, Santa BarbaraZhaoxia Ji - California NanoSystems InstituteChitrada Kaweeteerawat - National Nanotechnology CenterSijie Lin - State Key Laboratory of Pollution Control and Resource ReuseHunter S. Lenihan - University of California, Santa BarbaraRobert J. Miller - University of California, Santa BarbaraAndre E. Nel - California NanoSystems InstituteJose R. Peralta-Videa - The University of Texas at El PasoSharon L. Walker - University of California, RiversideAlicia A. Taylor - Univ Calif Los Angeles, Calif NanoSyst Inst, Univ Calif Ctr Environm Implicat Nanotechnol, Los Angeles, CA 90095 USACristina Torres-Duarte - Univ Calif Los Angeles, Calif NanoSyst Inst, Univ Calif Ctr Environm Implicat Nanotechnol, Los Angeles, CA 90095 USAJeffrey I. Zink - California NanoSystems InstituteNubia Zuverza-Mena - Univ Calif Los Angeles, Calif NanoSyst Inst, Univ Calif Ctr Environm Implicat Nanotechnol, Los Angeles, CA 90095 USA
- Publication Details
- NanoImpact, v 7, pp 28-40
- Publisher
- Elsevier
- Number of pages
- 13
- Grant note
- NSF-EF0830117 / U.S. Environmental Protection Agency (EPA); United States Environmental Protection Agency National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000410946100006
- Scopus ID
- 2-s2.0-85019710602
- Other Identifier
- 991021229999504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Environmental Sciences
- Nanoscience & Nanotechnology