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Occurrence, behavior and effects of nanoparticles in the environment
Bernd Nowack1, Thomas D Bucheli
1Technology and Society Laboratory, Empa - Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland. nowack@empa.ch
Environmental Pollution (Barking, Essex : 1987)
|July 31, 2007
Summary
Engineered nanoparticles (NP) released into the environment pose risks. Understanding NP mobility, reactivity, ecotoxicity, and fate is crucial for risk assessment, especially for functionalized NP.
Area of Science:
- Environmental Science
- Nanotechnology
- Ecotoxicology
Background:
- Engineered nanoparticles (NP) are increasingly used in industry and households, leading to environmental release.
- Assessing NP environmental risks requires understanding their mobility, reactivity, ecotoxicity, and persistence.
- Current knowledge gaps exist due to limited analytical techniques for NP detection in natural systems.
Purpose of the Study:
- To review classes of NP relevant to the environment.
- To summarize NP formation, emission, occurrence, and fate.
- To compare engineered NP with natural colloids like soot.
Main Methods:
- Literature review of NP environmental behavior.
- Comparison of engineered NP with natural substances.
- Analysis of ecotoxicological study results.
Main Results:
- Few quantitative analytical techniques exist for NP in natural systems, limiting occurrence data.
- Certain NP exhibit ecotoxicological effects on organisms, primarily at elevated concentrations.
- Functionalized NP used in applications may behave differently than pristine NP.
Conclusions:
- Estimating NP exposure is the critical next step for environmental risk assessment.
- Studies on pristine NP may not accurately reflect the behavior of functionalized NP in real-world applications.
- Further research is needed to develop analytical methods and assess the risks of functionalized NP.
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