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TĪNĒ: the fate, behavior, and ecotoxicology of manufactured nanomaterials in terrestrial ecosystems

Bertsch, P.M.; McGrath, S.; Unrine, J.M.; Tsyusko, O.V.; Kabengi, N.J.; McNear, D.M.; Lowry, G.V.; Casman, E.; Wiesner, M.; Liu, J.; Neal, A.; Jefferson, B.; Dorey, B.; Ritz, K.; Harris, J.; Rocks, S.; Lofts, S.; Spurgeon, D.; Svendsen, C.; Zhang, H.. 2012 TĪNĒ: the fate, behavior, and ecotoxicology of manufactured nanomaterials in terrestrial ecosystems. [Lecture] In: SETAC North America 33rd Annual Meeting, Long Beach, California, 11-15 Nov 2012. (Unpublished)

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Abstract/Summary

We have developed a life cycle perspective inspired conceptual model (CM) that indicates terrestrial ecosystems as a major repository for ZnO, TiO2, and Ag manufactured nanomaterials (MNMs) introduced via the land application of MNM-containing biosolids. In this project we are investigating the transport, fate, behavior, bioavailability, and effects of MNMs in(to) agroecosystems under environmentally realistic scenarios organized around three key hypotheses: Hypothesis (H1) Surface chemistry is the primary factor influencing the fate and transport of MNMs in the terrestrial environment as well as the bioavailability and effects to biological receptors; Hypothesis (H2) Once released to the environment, pristine MNM surfaces will be modified by interactions with organic and inorganic ligands (macromolecules) or via other biogeochemical transformations (aging effects forming a-MNMs); Hypothesis (H3) Ecoreceptors will respond to interactions with pristine metal and metal oxide MNMs, a-MNMs, and/or dissolved constituent metal ions and bulk oxides by specific ecological and toxicogenomic responses that will reflect their combined effects. The overall objectives are to: O1) Compare the transport, fate, behavior, bioavailability, and effects of MNMs, a- MNMs, and/or dissolved free metals/bulk oxides to organisms with key terrestrial ecosystem functions, as well as exposure pathways involving humans; O2) Determine MNM, surface modified MNM and a-MNM interactions with important biological targets relevant to the BLM and pBRM models and relate these interactions to physicochemical properties; O3) Validate models with information generated from experiments designed to address O1 for MNMs introduced through a pilot scale Waste Water Treatment Process (WWTP) to key terrestrial ecoreceptors, including effects of MNMs on the WWTP itself; O4) Determine realistic MNM emission scenarios for Tier 1 MNMs in wastewater from the WWT pilot plant data and develop first generation Life-Cycle-Analysis-inspired Risk Assessment (LCA-RA) model components for terrestrial effects of Tier 1 MNMs and a-MNMS based on data generated in experiments designed to address O1, O2, & O3; and O5) Provide tools for in situ detection, monitoring, and characterization of pristine MNMs and a-MNMs in environmental media and biota. The key results from aging and toxicity studies will be presented.

Item Type: Publication - Conference Item (Lecture)
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 2 - Biogeochemistry and Climate System Processes > BGC - 2.1 - Quantify & model processes that control the emission, fate and bioavailability of pollutants
CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 3 - Managing Threats to Environment and Health > BGC - 3.1 - Develop temporally and spatially explicit risk assessment tools ...
CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 3 - Managing Threats to Environment and Health > BGC - 3.2 - Provide the evidence base for setting Environment Quality Standards ...
CEH Sections: Hails
Shore
NORA Subject Terms: Ecology and Environment
Date made live: 09 Jan 2013 12:23 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/20925

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