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Definition:
Metallic elements with high atomic weights, e.g. mercury, chromium, cadmium,
arsenic, and lead. They can damage living things at low concentrations and tend
to accumulate in the food chain.
Source & ©:
US EPA
US EPA Drinking Water Glossary, A Dictionary of Technical and Legal Terms
Related to Drinking
Water 
Related words: Bioaccumulation - Biomagnification - Elemental mercury - Methylmercury
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