environmental risk assessment of engineered nanomaterials
DESCRIPTION
Nanomaterials Risk Assessment Meet environmental sustainability objectives by identifying and quantifying the environmental attributes of nanomaterials. Sources of nanomaterials? Fate and transport mechanisms? Likely exposure scenarios? Biological effects resulting from exposure? Proactively support the development and implementation of nanotechnology. Must include milestones and completion dates per task as given in P2. Format is flexible, can use Excel table or Microsoft Project (example above). Gant Chart format is preferred (tie to P2 activity). Describe the project plan in detail. Use this chart to explain how you will execute the project. Provide an explanation of key project management and scientific activities that you will execute. Discuss key milestones and scheduling of deliverables. A discussion of how you will handle (analyze/evaluate) data is mandatory – i.e., what is your statistical design. Media Primary Pathway Receptor Secondary Material Conceptual modelTRANSCRIPT
Environmental Risk Assessment of Engineered Nanomaterials
Katerina Dontsova, Elizabeth Ferguson, Al Kennedy, Jerry Miller, Mo Qasim, Chuck Weiss, Jeffery Steevens
Jeffery Steevens (lead)Email: [email protected]
Environmental Laboratory and Geotechnical and Structures Laboratory
US Army Engineer Research and Development Center
Nanomaterials Risk Assessment• Meet environmental sustainability objectives by
identifying and quantifying the environmental attributes of nanomaterials.– Sources of nanomaterials?– Fate and transport mechanisms?– Likely exposure scenarios?– Biological effects resulting from exposure?
• Proactively support the development and implementation of nanotechnology.
Media PrimaryPathway
PrimaryReceptor
Secondary Pathway
SecondaryReceptor
MaterialConceptual model
Conceptual Model1. Sources 2. Media and
Transport Processes3. Exposure Pathways
and Receptors
Benthic Invertebrates
Aquatic Invertebrates
Fish
Terrestrial Vertebrates
Terrestrial Invertebrates
Sediment
Fish
Air
Water
Soil
Sorption / desorption
Engineered Nanostructures
Engineered Nanodevices
Reaction Intermediates
Production Waste
Product Degradation
Settling / suspension
Settling / suspension
Aggregation/Degradation
Degradation
Degradation
Aggregation/UV Degradation
Contact, Ingestion
Ingestion
Inhalation
Ingestion
Contac
tIng
estio
n
Product use, SpillsIntentional application,
disposalIn
gest
ion
ContactIngestion
ContactIngestion
Cont
act
Inge
stio
n
Contact
Ingestion
Ingestion
IngestionContact
Ingestio
n
ERDC Research Efforts1. Relevant Vectors for Exposure (2 yr):Focus: Role of functionalization on the availability and toxicity of CNTUnique:1) CNT Only (PEG, NH3, COOH)2) Aquatic toxicity
2. Nanomaterial Structure Affect Biota? (2 yr): Focus: Biological effects of different nanomaterialsUnique:1) CNT, Fullerene, Metal Oxide, Reaction intermediates2) Measures of bioavailability/Toxicity
3. Nanomaterial Program (7 yr):Focus: Characterization and classification of nanomaterialsUnique:1) Characterization2) Goal to establish classification system
Shared:1) Materials (7 total) and cost
for synthesis2) Characterization information
ERDCRemediation Risk Sensors
ToxicologyFate
Analytical
Mechanisms
Modeling
Modeling
Sorption Transport
StabilityDose Metrics