新规科目二成都会计考试技巧

1、会计从业资格考试 http:/ Our topic: MINAMATA DISEASE & MERCURY水水 俣俣 病病 和和 汞汞柴歆烨柴歆烨 吕洲 秦嵩 蒋敏娜Silver Aven Wolf MinminIntroduction: MINAMATA DISEASE 水俣病水俣病 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 环保小贴示环保小贴示选用漂白、祛斑化妆品要慎之又慎。要选好选用漂白、祛斑化妆品要慎之又慎。要选好的品牌，看清有无特殊化妆品批准文号。的品牌，看清有无特殊化妆品批准文号。购买荧光灯时，买弯不买直，买细不买粗。购买荧光灯时，买弯不买直，买细不买粗。就是说，首选节能灯；若买直管型的，就买就是说，首选节能灯；若买直管型的，就买灯管细的。若能买采用汞丸、汞齐技术的更灯管细的。若能买采用汞丸、汞齐技术的更好。废弃时，千万不要摔破。好。废弃时，千万不要摔破。 补牙时，患者可要求尽量避免使用银汞补牙时，患者可要求尽量避免使用银汞齐材料，或将多余的银汞合金收集在盛齐材料，或将多余的银汞合金