Compositional / Combinatorial ENM Libraries
Molecular, Cellular, Organism HTS
Fate, Transport, Exposure
Marine & Freshwater Ecosystems
Environmental Decision Analysis
For several NPs, their dissolution and shedding of ions can be an important factor determining their toxicity and the ultimate fate of the NP. Specifically, the aims of the project are to: (1) determine the effect of solution chemistry on NP aggregation rates; (2) correlate NP properties (e.g., composition, size, morphology, crystal structure, and capping agents) and their tendency to aggregate or remain stable; (3) study the interactions between NPs and suspended particles; and (4) determine the rate of dissolution of metal and metal oxide NPs in natural waters. We work with metal (Ag, Pd and Pt) and metal oxide (TiO2, CeO2, ZnO, CuO and Fe2O3) NPs provided by Theme 1.
Overall, the outcome of this project is contributing to (1) identify critical environmental and material parameters affecting NP aggregation, which will help to predict the behavior of these NPs when released in the environment; (2) provide detailed information to ecotoxicologists in Themes 4 and 5 regarding (a) particle size and aggregation/disaggregation process they should expect when conducting toxicology studies; (b) rate of NP dissolution and availability of dissolved metal ions; and (c) improvements to the dispersion protocols of these metal and metal oxide NPs. In addition, the experimental aggregation data will be important input and validation components for the environmental modeling endeavor of Theme 6.
UC Center for Environmental Implications of Nanotechnology • Dr. Andre Nel, Director
UC CEIN @ UCLA • 6522 CNSI Bldg., 570 Westwood Plaza • Los Angeles, CA 90095-7227 • email@example.com
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