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4
CH3041
LEAD IV
• Lead pipes
for water supply are still in use in Europe. They rely on hard
water where a CaCO3 layer builds up and prevents lead dissolution.
When soft water (pH »
5) is sent through [Pb] rise quickly to [Pb] 1mg L-1.
• Lead is a common contaminant of sewage sludge,
re-use is therefore controlled.
• Mine
dumps from the processing of Pb containing ores often show
considerable leaching of Pb2+ when acidification occurs.
• Lead shot
in duck shooting has resulted in high
local [Pb] around duck ponds.
Wildlife that hasn’t been shot also tend to
eat the shot and get poisoned.
Wildlife that hasn’t been shot also tend to
eat the shot and get poisoned.
• US shooting ranges use
400-600 ton/day
