Zhu effect emphasized in recent years, the United States, the World Health Organization and other developed countries and organizations of respirable particulate matter (PM10, PM2.5) sources, environmental effects and human health impacts been systematically studied, that PM10 and PM2.5 is necessary for the implementation of category management, namely the development of environmental air quality standards. (Xinhua Wo)
Peking University professor Pan Xiaochuan said, for the purposes of respirable particulate matter, compared with PM10, PM2.5 more easily suspended in the air a long time, because of its small particle size, inhalation risk becomes greater, can reach the deep lung, lower respiratory tract in-depth, and even penetrate the alveolar membrane, causing enormous damage to human health.
According to the World Health Organization's , mercury and dioxins 11 have a higher level of pollutants on human health hazards.
cardiovascular and central nervous system, improve mortality.
According to the Chinese People's University School of Law and Public Environmental Research Center jointly issued the ambient air quality standards on the general provisions of the main pollutants, sulfur dioxide, nitrogen dioxide, respirable particulate matter (PM10), carbon monoxide, ozone, lead. Most developed countries are fine particulate matter (PM2.5) as a new control project, the abolition of the traditional total suspended particles (TSP); the European Union, the United Kingdom and Japan, also benzene and other toxic volatile organic compounds (VOCs) project was carried out as a requirement of pollutants; and developing countries or regions, especially in Asian countries retained the TSP program, there is no increase in PM2.5 control.
recent years, lead poisoning often occurs all over the country. One short-term exposure to lead, will have lead poisoning, long-term exposure not only affects the central nervous system, renal and reproductive systems, but also cause mental retardation and other problems of children; on people, the benzo (a) pyrene is a more unfamiliar contaminants, short-term exposure can irritate the eyes and skin, long-term exposure to carcinogenic, teratogenic and mutagenic; short-term exposure to mercury, mercury or mercury poisoning caused by the blood, resulting in abdominal pain, diarrhea, hematuria, and other symptoms, neurological symptoms have long-term exposure, limbs and other tremor and stomatitis; Dioxin is a carcinogenic, toxic, hazardous, especially huge.
life of 70 years.
national urban air quality monitoring different
will mainly come from coal and motor vehicle emissions of arsenic (As), cadmium (Cd) and nickel (Ni) and other heavy metal contaminants into the control.
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