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Acid precipitation--effects on trace elements and human health
L Gerhardsson1, A Oskarsson, S Skerfving
1Department of Occupational and Environmental Medicine, Lund University Hospital, Sweden.
The Science of the Total Environment
|August 22, 1994
Summary
Acid precipitation mobilizes toxic metals, potentially altering human intake of essential and toxic elements. While direct health effects are unproven, safety margins are small, necessitating action to halt environmental acidification.
Area of Science:
- Environmental Science
- Toxicology
- Human Health
Background:
- Acid precipitation increases toxic metal solubility and mobility.
- This can alter human intake of essential and toxic elements via the food chain.
- Potential adverse health effects from increased exposure are a concern.
Purpose of the Study:
- To discuss the effects of acid precipitation on trace element status and human health.
- To summarize findings presented at the ISTERH Conference in Stockholm, May 1992.
Main Methods:
- Review of existing data and indications regarding acid precipitation's impact on element intake.
- Discussion at an international conference involving experts in trace element research.
Main Results:
- Indications suggest acid precipitation may affect exposure to toxic elements (e.g., aluminum, cadmium, lead, methylmercury) and essential elements (e.g., selenium).
- No definitive evidence of adverse human health effects currently exists.
- Safety margins for human exposure appear to be narrow.
Conclusions:
- Ongoing environmental acidification must be addressed to prevent potential adverse health effects.
- Urgent action is needed to mitigate the risks associated with acid precipitation and toxic metal exposure.