New light source: LED is often ignored an advantage

We know that mercury is a kind of extremely toxic substance, but in the most efficient electric light source applied at present almost all contain mercury, the mercury content of various kinds of electric light source shown in the following table

and the boiling point of mercury is very low, can evaporate at room temperature. A waste disposal after light broken, immediately to the surrounding mercury vapor, moments can make the concentration of mercury in ambient air reached 10 - 20 mg/cubic meters, more than the provisions of the state of mercury in air maximum allowable concentration ( To zero. 01 mg/m3) From 1000 to 2000 times. , according to Stanford university study of mercury, mercury 1 mg 5454 enough to pollution. 5 kg of drinking water, and make it reach the drinking safety standards. Mercury by air and the consequences of water pollution is very serious, it would generate CH3Hg feeds by the water, it is a highly toxic material, as long as half an ear pick can cause person in siming. Mercury itself can damage the central nervous system, it causes reproductive defects effect also is very serious, mercury can damage the kidneys and liver, under the condition of sufficient dose can even cause death. Mercury can in different ways, and even the atmosphere in the soil, water, food chain transfer. Therefore, durability, easy mobility and high bioaccumulation, makes mercury today, one of the most notable environmental pollutants around the world. Is the most serious mercury poisoning event in the history of Japan's minamata disease events, at that time because of minamata bay water by mercury pollution and hundreds of people dead. Now the Japanese government has learned a lesson for all the waste fluorescent lamp required for the processing of toxic substances, thereby request purchase must pay double the price of the common fluorescent lamp to advance the toxic substance disposal.

the Chinese government recently issued 100 million energy-saving lamps free, although recent foreign special low amount of mercury mercury energy-saving lamps can be reduced to less than 5 mg ( Still don't know if sent by the Chinese government is such low mercury energy-saving lamps) , but does not reduce its harmfulness, because the mercury content of a such low mercury energy-saving light pollution is enough to 27. 27 tons of drinking water. And 100 million energy-saving lamps to 2. 7 billion tons of water pollution, the equivalent of the national people's years of drinking. Little pony

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