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12_T01. Toxic Waste …. Heavy Metals: Pb, Hg, Zn, Cd – often deposited at the bottom of stream channels If deposited in floodplains will be incorporated into plants, crops and animals Examples: Mercury contamination of aquatic ecosystems; sourced:

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toxic waste
Toxic Waste …
  • Heavy Metals: Pb, Hg, Zn, Cd – often deposited at the bottom of stream channels
  • If deposited in floodplains will be incorporated into plants, crops and animals
  • Examples:
    • Mercury contamination of aquatic ecosystems; sourced:
      • from volcanoes and erosion of natural mercury deposits
      • Burning coal, incinerating waste, processing metals
  • Lead to e.g., lead or mercury contamination
  • Radioactive materials