新規(guī)科目二成都會(huì)計(jì)考試技巧

1、會(huì)計(jì)從業(yè)資格考試 http:/ Our topic: MINAMATA DISEASE & MERCURY水水 俁俁 病病 和和 汞汞柴歆燁柴歆燁 呂洲 秦嵩 蔣敏娜Silver Aven Wolf MinminIntroduction: MINAMATA DISEASE 水俁病水俁病 What we now call “Minamata disease” was first observed in communities near Minamata Bay in Southwestern Japan. The Fact of Minamata DiseaseLevels of methylm

2、ercury chloride reached 50 ppm in fish and 85 ppm in shellfish obtained from the contaminated areas.One hundred and twenty one persons were poisoned, 46 fatally, from eating the contaminated fish.Dogs, cats, pigs, rats, and birds living around the bay developed classical clinical signs and many died

3、.The dead fishThe symptom of Minamata DiseaseIn most cases, first without any apparent signs.numbness of the limbs and the area around the mouth,sensory disturbance, difficulty with hand movements.lack of coordination, weakness and tremor, slowed and slurred speech, ataxic gait, disturbances of visi

4、on and hearing. Became aggravated and led to general paralysis, deformity of the limbs, difficulty in swallowing, convulsions, and death. The Cause of Minamata DiseaseFor production purposes, the company made use of large amounts of mercury compounds as reaction catalysts. The increased volume of pr

5、oduction wastes was discharged into Minamata Bay without any treatment.It is Mercury By 1959 it had been demonstrated that the minamata disease was caused by ingestion of fish contaminated by mercury discharged from a chemical manufacturer plant. About Environmental MercuryMercury is a silvery, liqu

6、id metal at room temperature. It is sometimes referred to as one of the heavy metals.“Like water, mercury can evaporate and become airborne.Because it is an element, mercury does not break down into less toxic substances.Bacteria and chemical reactions in lakes and wetlands change mercury into a muc

7、h more toxic form known as methylmercury.Mercury enters the environment from:A naturally occurring elementNatural sources : volcanoes and the weathering of rocksOur intentional uses of mercuryOur unintentional releases of mercury :burning fossil fuels and smelting metalsA by-product of gold and zinc

8、 miningHgPower plants are responsible for 34% of the total mercury emitted by all known sources. More than 99% of that mercury comes from coal-fired power plants.Pollution MechanismWhats worse, mercury can Cross blood-brain barrier as well as placenta barrier, so parents need information in order to

9、 protect not only their own health but also the health of their unborn babies.Major reductions bans in paint and pesticides, phaseouts in batteries , and reductions in industrial uses. Continued effective control of mercury emissions may require a mix of strategies including pollution prevention, ma

10、terials separation, and conventional regulatory approaches. TreatmentMercury InvestigationsInvestigations Developing Bacteria that Degrade Contaminants 環(huán)保小貼示環(huán)保小貼示選用漂白、祛斑化妝品要慎之又慎。要選好選用漂白、祛斑化妝品要慎之又慎。要選好的品牌，看清有無特殊化妝品批準(zhǔn)文號(hào)。的品牌，看清有無特殊化妝品批準(zhǔn)文號(hào)。購買熒光燈時(shí)，買彎不買直，買細(xì)不買粗。購買熒光燈時(shí)，買彎不買直，買細(xì)不買粗。就是說，首選節(jié)能燈；若買直管型的，就買就是說，首選節(jié)能燈；若買直管型的，就買燈管細(xì)的。若能買采用汞丸、汞齊技術(shù)的更燈管細(xì)的。若能買采用汞丸、汞齊技術(shù)的更好。廢棄時(shí)，千萬不要摔破。好。廢棄時(shí)，千萬不要摔破。 補(bǔ)牙時(shí)，患者可要求盡量避免使用銀汞補(bǔ)牙時(shí)，患者可要求盡量避免使用銀汞齊材料，或?qū)⒍嘤嗟你y汞合金收集在盛齊材料，或?qū)⒍嘤嗟你y汞合金