Minamata Disease
Japan city minamata, kumamoto prefecture 1956 - first case
Acetylene - Acetaldehyde using Mecury-catalyzer
By-prouduct - Methylmercury MeHg
Chisso Co. Ltd. (1932-1950s-1968) - $86 million compensation (by 2004)
-
central nervous system is damaged
- ataxia (difficulty coordinating movement of hands and feet)
- concentric constriction of the visual field (narrowing of the field of vision)
- hearing impairment
Flowchart
industrial wastewater ↓ Fish shellfish ↓ minamata Bay & shiranui sea - local population
Human - 2,265 victims (March 2001)
Cats - dancing cat fever 🐈
Blackfoot Disease
- peripheral vascular disease - arsenic containing artesian well water (natural contaminant in groundwater)
- taiwan - east asia - republic of china
Arsenic - As (silver grey)- Z=33, M=74.9
- alloying agent, glass making, textile, paper
Itai-itai - 1968
- Cadmium polluted Jinzu River basin in Toyama Prefecture
- Severe pain in spine and joints
- cadmium poisoning = softening of bones / kidney failure (mitochondria of kidney cell damaged)
- reason :
- silver mining, lead, copper & zinc byproduct cadmium
- Mitsui mining & smelting Co. Ltd company realsed into rivers
Cadmium Cd (soft bluish white)- Z=48, M=112.4
- used for batteries, metal coatings
- most toxic - cancer causing at work (not enterns thru skin)
- accumulates throughout life
Hope it helps :)
Top comments (0)