Presentation on theme: "Kasus Bhopal December 3-4, 1984: 40 tonnes of methyl iso-cyanate (MIC) released from Union Carbide plant at Bhopal Accidental release caused by leakage."— Presentation transcript:
Kasus Bhopal December 3-4, 1984: 40 tonnes of methyl iso-cyanate (MIC) released from Union Carbide plant at Bhopal Accidental release caused by leakage of water into MIC storage tank None of the six safety systems worked Safety standards and maintenance system ignored for months Complete absence of community information and emergency procedures Public alarm system operated after the gas had leaked for nearly four hours
Industrial disaster “Industrial disasters are caused by chemical, chemical, mechanical, civil, electrical, or other process failures due to accident, negligence or incompetence, in an industrial plant which may spill over to the areas outside the plant causing damage to life and property.”
“Chemical disasters are occurrence of emission, fire or explosion involving one or more hazardous chemicals in the course of industrial activity or storage or transportation or due to natural events leading to serious effects inside or outside the installation likely to cause loss of life and property including adverse effects on the environment.” Chemical disaster
Major industrial disasters that shaped public policy Triangle Factory Fire New York (USA) garment workers died in fire Minamata Mercury Disaster (Japan) ,000 people suffered, severe mercury poisoning symptoms, deformities or death Seveso Dioxin Disaster (Italy) ,000 animals died, 70,000 slaughtered to prevent dioxins entering food chain Bhopal Gas Disaster (India) ,000 killed, over 500,000 affected
Bhopal Gas Tragedy Worst industrial disaster in history 2,000 people died on immediate aftermath Another 13,000 died in next fifteen years persons dying every month 520,000 diagnosed chemicals in blood causing different health complications 120,000 people still suffering from – Cancer – Tuberculosis – Partial or complete blindness, – Post traumatic stress disorders, – Menstrual irregularities Rise in spontaneous abortion and stillbirth
Second generation effect ICMR, IMA, AMA studies show – Children born with genetic defects – Growth retardation in boys – Hormonal chaos among girls Ground water contamination with high level of mercury, lead, nickel, VOCs and HCH High prevalence of skin and gastro-intestinal diseases Bioaccumulation of toxins found in vegetables and breast milk
Chisso Corporation Chisso = nitrogen – Produced fertilizer 1907: Chisso Corp. builds a fertilizer plant in the Minamata. Job openings 1925: plant begins dumping untreated wastewater into Minamata Bay – Kills fish – Fisherman Payoffs
Chisso Corporation 1932 : Chisso plant begins to produce acetaldehyde to be used in the production of plastic, perfume and drugs. Acetaldehyde is made from acetylene and water with a mercury catalyst. After WWII plastic production boomed and Chisso Corp. grew. By 1970: Chisso brought Japan 60% of its income and owned nearly 70% of the land in Minamata.
Bizarre Behavior in Animals Early 1950’s: – Dead fish wash ashore – Crows fall out of sky – Suicidal dancing cats Mercury moves up the food chain.
Mid 1950’s: Behavior Seen in Humans Behaviors witnessed: – Loss of motor control in hands – Violent tremors – Swaggered walk – Insanity “Cat-dancing” disease Nobody knew the cause of the epidemic. – Many hid for fear of ridicule ectsSpring03/ebarker/Minamata%20Web%20Page.htm
The Aftermath tons of methyl mercury was dumped into the Bay 10,000 people affected by Minamata disease. – 3,000 died Compensation has been given to families as recently as – Highest compensation for the disaster was just under $3,000.
Symptoms of the Disease Mild – Ataxia – Muscle weakness – Narrowed field of vision – Hearing and speech damage Severe cases cause – Insanity – Paralysis – Coma – Death W. Eugene Smith Tomoko Uemura in Her Bath Minamata, 1972 Methylmercury poisoning Minamata Japan, 1930s-1950s
More Symptoms A significant effect of Minamata is the onset of symptoms similar to those of cerebral palsy Fetal Minamata Disease – A pregnant mother ingests toxic fish and the methylmercury concetrates inside the placenta. – Harms the fetus while the mother is relatively unaffected KURA#
These are all children with congenital (fetal) Minamata Disease due to intrauterine methyl mercury poisoning (Harda 1986).
Examples of chemicals in food, air, water linked to birth defects Cross placenta to embryo Defects of brain, nerves, heart Defects of skeleton (often limbs) Blindness, deafness Spasticity Mental retardation Defects of heart, brain Blindness, deafness Decreased fetal growth Defects of face (cleft palate/lip) Emotional & learning problems
Mercury: The Basics Mercury (Hg) is the only metal that is liquid at room temperature. It melts at o C and boils at o C. Mercury conducts electricity, expands uniformly with temperature and easily forms alloys with other metals (called amalgams). – For these reasons, it is used in many products found in homes and schools.
Mercury Chemistry Mercury exists in three oxidation states: – Hg 0 (elemental mercury). – Hg 2 2+ (mercurous). – Hg 2+ (mercuric). Mercurous and mercuric form numerous inorganic and organic chemical compounds. – Organic forms of mercury, especially methyl mercury, CH 3 Hg(II)X, where “ X ” is a ligand (typically Cl - or OH - ) are the most toxic forms.
Uses of Mercury We use its unique properties to conduct electricity, measure temperature and pressure, act as a biocide, preservative and disinfectant and catalyze reactions. – It is the use of mercury in catalysis that contributed to the events in Minamata. Other uses include batteries, pesticides, fungicides, dyes and pigments, and the scientific apparati.
Mercury in the Environment Upwards of 70% of the mercury in the environment comes from anthropogenic sources, including: – Metal processing, waste incineration, and coal-powered plants. Natural sources include volcanoes, natural mercury deposits, and volatilization from the ocean. Estimates are that human sources have nearly doubled or tripled the amount of mercury in the atmosphere.
Methylmercury concentrations Freshwater fish ppm Ocean fish ppm Predator fish> 1.0ppm Fish in “polluted” water> 10ppm Fish from Minamata Bay~ 50ppm Whale meat~4ppm Whale liver>1000ppm Reference dose 0.1 g/kg bw/day 135-lb. woman: 1.5oz. Swordfish or 7 oz. tuna/week 50-lb. child: 0.5oz. Swordfish or 2.6 oz. tuna/week
Four Major Pollution di Jepang CaseAccusedRuling Minamata Disease (organic mercury in sea water) Chisso Corp.Plaintiff wins in 1973 Itai-itai Disease (cadmium in river water) Mitsui KinzokuPlaintiff wins in 1972 Niigata Minamata Disease (organic mercury in river water) Showa DenkoPlaintiff wins in 1971 Yokkaichi Asthma (air pollution by petrochemicals) Mitsubishi Petrochemicals etc Plaintiff wins in 1972 Yokkaichi 1961Yokkaichi today Award winning photo of Minamata Disease victim
Bhopal, India This presentation is based on the text articles, Bhopal, pp , and Chemical Safety in Developing Countries, the lessons of Bhopal, pp In Dec. 3, 1984, an explosion at the Union Carbide plant released a deadly cocktail of poison gas made up of methyl isocyanante, hydrogen cyanide, monomethyl amine, carbon monoxide and up to 20 other chemicals. 4 months later report on 1,430 deaths. By 1999, the toxic gas killed at least 16,000 according to local estimates; tens of thousands continue to suffer.
Arsenic toxicity from well waters in Bangladesh and CCA Bangladesh may be heading for an epidemic of arsenic poisoning with an estimated 60 million regularly ingesting arsenic through drinking contaminated groundwater Surveys of groundwater used for drinking and cooking have identified unacceptably high concentrations of arsenic in several thousand deep tube wells, Dr Karim said. Some wells contain 0.4 mg/l of arsenic, 40 times the acceptable concen BMJ March 25; 320(7238): 826. Half of Bangladesh population at risk of arsenic poisoning
Dioxin and Chloracne VIENNA, Austria (CNN) -- Dioxin poisoning caused the disfiguring illness afflicting Ukrainian opposition presidential candidate Viktor Yushchenko, doctors at an Austrian hospital said Saturday. Doctors said at a news conference that they suspect a "third party" administered the poison in September, possibly by putting it in Yushchenko's soup.