China has been in the news a lot recently for its poor health record. It is a sad fact that they are not the only country with this problem, and that this is not a new problem. Let me take you back to Bhopal, India in December 1984. According to the Wikipedia article(1):
The Bhopal disaster was an industrial disaster that occurred in the city of Bhopal, Madhya Pradesh, India, resulting in the immediate deaths of more than 3,000 people, according to the Indian Supreme Court. A more probable figure is that 8,000 died within two weeks, and it is estimated that an additional 8,000 have since died from gas related diseases.
The incident took place in the early hours of the morning of December 3, 1984, in the heart of the city of Bhopal in the Indian state of Madhya Pradesh. A Union Carbide subsidiary pesticide plant released 42 tonnes of methyl isocyanate (MIC) gas, exposing at least 520,000 people to toxic gases. The Bhopal disaster is frequently cited as the world’s worst industrial disaster.
In summary:
During the night of December 2-3, 1984, large amounts of water entered tank 610, containing 42 tonnes of methyl isocyanate. The resulting reaction generated a major increase in the temperature inside the tank to over 200°C (400°F), raising the pressure to a level the tank was not designed to withstand. This forced the emergency venting of pressure from the MIC holding tank, releasing a large volume of toxic gases. The reaction was sped up by the presence of iron from corroding non-stainless steel pipelines. A mixture of poisonous gases flooded the city of Bhopal. Massive panic resulted as people woke up in a cloud of gas that burned their lungs. Thousands died from the gases and many were trampled in the panic.
A few facts:
- Apart from MIC the gas cloud may have contained phosgene, hydrogen cyanide, carbon monoxide, hydrogen chloride, nitrous oxides, monomethyl amine (MMA) and carbon dioxide, either produced in the storage tank or in the atmosphere. All these gases, except carbon dioxide, are acutely toxic at levels well below 500 ppm.
- The gas cloud, composed mainly of materials more dense than the surrounding air, stayed close to the ground and spread outwards through the surrounding community. The initial effects of gas exposure were coughing, vomiting, severe eye irritation and a feeling of suffocation. People awoken by these symptoms fled away from the plant. Those who ran inhaled more than those who had a vehicle. Due to their height, children and other people of lower stature inhaled relatively higher concentrations. Many people were trampled trying to escape.
- Thousands of people had succumbed to gas exposure by the morning hours. There were mass funerals and mass cremations as well as bodies being disposed of in the Narmada river. 170,000 people were treated at hospitals and temporary dispensaries. 2,000 buffaloes, goats, and other animals had to be collected and buried. Within a few days, leaves on trees went yellow and fell off. Supplies including food became scarce due to safety fears by the suppliers. Fishing was prohibited as well which caused further supply shortages.
- A total of 36 wards were marked by the authorities as being “gas affected”, affecting a population of 520,000. Of these, 200,000 were below 15 years of age, and 3,000 were pregnant women. In 1991, 3,928 deaths had been certified. Independent organizations recorded 8,000 dead the first days. Other estimations vary between 10,000 and 20,000. It is estimated that 10,000 have died since the accident from gas related diseases. Another 100,000 to 200,000 people are estimated to have permanent injuries.
- The acute symptoms were burning in the respiratory tract and eyes, blepharospasm, breathlessness, stomach pains and vomiting. The causes of deaths were choking, reflexogenic circulatory collapse and pulmonary oedema. Findings during autopsies revealed changes not only in the lungs but also cerebral oedema, tubular necrosis of the kidneys, fatty generation of the liver and necrotising enteritis. The stillbirth rate increased by up to 300 % and neonatal mortality rate by 200 %.
All of this was the result of a very preventable disaster.
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(1)http://en.wikipedia.org/wiki/Bhopal_disaster
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