1、POPs污染现状与对策分析The status quo and possible solution to the pollution of POPs杨新羽 张嘉幼 曾晓文The conception of POPs POPs are a small group of persistent , bio-accumulative , long-range transported and toxic chemicals. They have high solubility in grease. Through the transportation of atmosphere and water, t
2、he pollution of POPs can be global, so they are considered to be highly poisonous. In May 2001 , the Stockholm Convention , a legally binding treaty on POPs , was signed. It entered into force on May 27th, 2004. China signed the Convention on the first day opened for signature. 1) DDT、氯丹 (chlordane)
3、、灭蚁灵 (mirex)、艾氏剂 (Aldrin)、狄氏剂 (Dieldrin)、异狄氏剂 ( Endrin)、七氯 (heptachlor)、毒杀酚(toxaphene)；2) 六氯苯 (hexachlorobenzene)和 PCBs；3) including dioxins、呋喃 (furan)类The structure of PAHs1,2,5,6-二苯并蒽(显著致癌性 ) 芘 (bi)3,4-苯并芘 (高度致癌性 )The structure of PAHs6-甲基 -5,10-亚乙基 -1,2-苯并蒽 10-甲基 -1,2-苯并蒽The structure of PAHs2-甲基
4、 -3,4-苯并菲 1,2,3,4-二苯并菲The property of PAHs PAHs结构上最明显的特征是它们都是在一个平面上的稠环相结合。它的分子中，多个苯环的共轭 电子云，构成大 电子云体系，决定了其自身的光学性质，同时也使得 PAHs具有稳定的化学性质。自然界中除少数几个氢化衍生物外，所有的 PAHs在常温下大多是固态，且挥发性甚小 (萘除外 )。由于 PAHs的分子量较大，而且没有极性取代基团，导致其在水中的溶解度极小。The transmission of POPs Persistent Organic Pollutants are transported across in
5、ternational boundaries far from their sources, even to regions where they have never been used or produced. The eco-systems and indigenous people of the Arctic are particularly at risk because of the long-range environmental transportation and bio-magnification of these substances. Consequently, per
6、sistent organic pollutants pose a threat to the environment and to human health all over the globe.The status quo - which we must encounter There are many significant events caused by POPS, for instance, the fatal damage in 1968( Aizhi county, Japan) caused by PCBs in edible oil, resulted in several
7、 death and agenesis of infants. Similar events happened in Taiwan, China. During the civil war in the United States, the wide spread of POPs caused countless health problems in the local people, the soldiers and their descendents. In 1999, Belgium, the pollution of PCDD and PCDF in chicken-feedstuff
8、 spread all over the world, causing disastrous damage to the stock raising industry, The living proof How can POPs come into our surroundings? Firstly, by the combustion of rubbish and other solid wastes. Secondly, by the combustion at a high temperature of fossil fuel and the release of oils. Thirdly, the process of industry. (smelting, prefabricating, heating, paper making, printing and dyeing)
