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Title:

Biological accumulation of engineered nanomaterials: a review of current knowledge

Date:

1/2013

Link to Journal Abstract

Abstract:

Due to the widespread use of engineered nanomaterials (ENMs) in consumer and industrial products, concerns have been raised over their impacts once released into the ecosystems. While there has been a wealth of studies on the short-term acute toxic effects of ENMs over the past decade, work on the chronic endpoints, such as biological accumulation, has just begun to increase in last 2�3 years. Here, we comprehensively review over 65 papers on the biological accumulation of ENMs under a range of ecologically relevant exposure conditions in water, soil or sediment with the focus on quantitative comparison among these existing studies. We found that daphnid, fish, and earthworm are the most commonly studied ecological receptors. Current evidence suggests that ENM accumulation level is generally low in fish and earthworms with logarithmic bioconcentration concentration factor and biota-sediment accumulation factor ranging from 0.85�3.43 (L kg?1) and ?2.21�0.4 (kg kg?1), respectively. ENMs accumulated in organisms at the lower trophic level can transfer to higher trophic level animals with the occurrence of biomagnification varying depending on the specific food chain studied. We conclude the review by identifying the challenges and knowledge gaps and propose paths forward.

Non-technical Summary:

This paper comprehensively reviews over 65 papers on the biological accumulation of engineered nanomaterials (ENMs) under a range of ecologically relevant exposure conditions in water, soil or sediment with the focus on quantitative comparison among these existing studies.

Content Emphasis

Review Article

Exposure Or Hazard Target

Exposure Pathway

Method Of Study

Paper Type

Environmental Fate and Transport

Particle Type