STUDY OF POLLUTION CHARACTERISTICS IN DUST BUNNIES AROUND THE COAL-FIRED POWER PLANT

Taking the dust bunnies in the surrounding areas of a power plant in Chengdu as the research object，the content of five heavy metals( Pb，Zn，Cu，Ni and Cr) and soluble inorganic anion content in the dust bunnies were evaluated，and on the basis of the result the dust bunnies pollution characteristics in the surrounding areas of the coal-fired power plant were studied． Results show that the average content of heavy metals in the region＇s dust bunnies was in the order of Zn ＞ Pb ＞ Cr ＞ Cu ＞ Ni． Results showed that Zn and Pb pollution is the most severe，consider as the rank moderate; the influence of the power plant activities contributes the most so as to threat the residents＇health; the enrichment factor of Cl － ，NO － 3 and SO2 － 4 in dust bunnies is 2. 8，4. 78 and 3. 03，respectively，all belonging to rank moderate． It can be infered that，in addition to the natural source， pollution also from human activities，especially that of the power plant．