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CH3041
METALS
• Chemical industries have a range of toxic metals (TM) in their waste streams.
eg. Cr(III) from tanning ® Cr(VI) - rivers
Hg(0) chlor-alkali process (Cl2) - rivers
eg. Cr(III) from tanning ® Cr(VI) - rivers
Hg(0) chlor-alkali process (Cl2) - rivers
• Landfill leachate may contaminate
groundwater with a range of toxic metals.
groundwater with a range of toxic metals.
• Minesite
wastes. Both operating and
abandoned mines (2000 FNQ) ® TM(aq)
abandoned mines (2000 FNQ) ® TM(aq)
• Tailings dam: holding
for highly contaminated water,
frequently breached.
• Tailings: pulverised rock containing residual un-recovered metals and sulfur.
The acid
ensures mobilisation of the metals.
eg. Mont Albion Mine (Herberton) Acid Mine Drainage (AMD) pH 4 Walsh River watershed
[Zn] 1ppm; [Pb], [As], [Cd] 10 –100ppb.
eg. Mont Albion Mine (Herberton) Acid Mine Drainage (AMD) pH 4 Walsh River watershed
[Zn] 1ppm; [Pb], [As], [Cd] 10 –100ppb.
