29-03-2014, 10:32 AM
Hg Pollution
Hg Pollution.ppt (Size: 1.87 MB / Downloads: 26)
Burning of fossil fuels (coal)
Burning of wastes
Industries
Volcanoes
Forest fire
Weathering
Improper use & disposal of fluorescent tubes, batteries, etc.
Chemical labs, hospitals, dental clinics
Cases of Hg Poisoning
UK (1940)
Minamata (Japan) (1932-68)
Niigata (Japan) (1965)
Iraq (1971-1972)
A Chemistry professor (1996)
Heavy Metals in Factory Effluent
Pb
Hg (2 kg/ton of sediment)
Mn
As
Se
Thallium
Cu
Symptoms
Damage to central nervous system
Sensory impairment
Lack of coordination
Heart, kidney, liver problem
Hypersalivation
Difficulty in walking
Muscle weakness
Paralysis
Death