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Exposure assessment approaches for engineered nanomaterials.

Linda C Abbott¹, Andrew D Maynard

¹U.S. Department of Agriculture, Office of Risk Assessment and Cost-Benefit Analysis, Washington, DC 20250-3811, USA. labbott@oce.usda.gov

Risk Analysis : an Official Publication of the Society for Risk Analysis

|July 15, 2010

Summary

Engineered nanomaterials in products pose exposure risks. Developing new metrics and models is crucial for monitoring their lifecycle and biological impact.

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Area of Science:

Environmental Science
Toxicology
Materials Science

Background:

Nanotechnology products are increasingly common, often without consumer awareness of their nanoscale components.
Unintentional human exposure to engineered nanomaterials can occur through dermal, inhalation, ingestion, and ocular routes throughout product lifecycles.

Purpose of the Study:

To address challenges in monitoring engineered nanomaterials and their exposure.
To propose methods for characterizing nanomaterial exposure and biological impact.

Main Methods:

Reviewing existing exposure monitoring tools and metrics.
Proposing an exposure metric matrix relating pathways to material characteristics.
Suggesting the development of new monitoring devices and exposure models.

Main Results:

Current detection techniques and standardized metrics for nanomaterials are insufficient.
An exposure metric matrix can organize data by linking exposure pathways with material properties.
Further research is needed to measure nanomaterial characteristics that elicit biological responses.

Conclusions:

Standardized monitoring and new exposure models are essential for managing risks associated with engineered nanomaterials.
Lifecycle analysis and advanced modeling are key to understanding nanoparticle behavior and exposure.
Developing targeted monitoring devices is critical for assessing human health impacts.