[Group 11] Japan's overcoming severe pollution in the period of 1950s-1970s and experiences for V

Then chisso company bought all those fish to destroy

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encouraged fisherman to catch fish in the Bay. Then, Chisso Company bought all those fish to destroy. Since Chisso stopped the production of Acetaldehyde, mercury concentrations in fish and shellfish in Minamata Bay has been increasingly reduced. In October 1994, the Kumamoto Prefectur confirmed the amount of mercury in fish in Minamata Bay was well within the national standard of 0.4 ppm. Therefore, in July 1997, the province declared Kumamoto Minamata safe back and all the nets were removed. Today, the whole fish in Minamata are safe like other fish outside the bay. Although the nets have been removed, the survey of mercury concentrations in fish and shellfish in Minamata Bay is still conducted two times a year. The data about Minamata are lessons for not only Japanese but also many people in the world about human health affected seriously on a large scale due to devastated environment. Therefore Minamata disease should be concerned and researched more. Minamata patients Until 30 April 1997, number people in two provinces Kumamoto and Kagoshima getting Minamata disease was calculated up coming 17 thousand people in which 2,265 people were recognized by government, 10,625 people after certifying were fully compensated. According Japanese Government, there are a total number of 12,890 people getting sick up to now. However there are some people who died before this disease was officially discovered, and many persons did not promptly fill 15
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to obtain a certificate and passed away then. Therefore it is difficult to have exact number of those Minamata patients. The victims and Company Chisso had reached a final conclusion in June 1973 depend on the decision of the court on Minamata disease in March 1973. For those who were testified as Minamata patients, they would receive a compensation from 16-18 million yen. Also Chisso took care of the allowance every year, medical expenses, caring, funeral expenses .... Additionally, company also had to be responsible for help, consolation gifts, massage therapy, etc. On the other hand, for those who were not certified as Minamata patients but had obviously experienced the depression because of eating a large amount of fish and shellfish ... would be paid by Kumamoto and Kagoshima provinces in the lists that health insurance did not cover, and other medical costs (about 17.200 to 23.500 yen / month) from October 2000. Based on an assistance program of government, victims even alive or dead, having been affected to health from methyl mercury (except those certified as Minamata patients) will not ask a compensation again after receiving a compensation package of 2.6 million yen / person. Chisso Company’s Compensation The Chisso Minamata factory first started acetaldehyde production in 1932, producing 210 tons that year. By 1951 production had jumped to 6,000 tons per year: over 50% of Japan's total output. The chemical reaction used to produce the acetaldehyde used mercury sulfate as a catalyst. A side reaction of the catalytic cycle led to the production of a small amount of an organic mercury compound, namely methyl mercury.
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