RESEARCH ON CHARACTERISTICS OF THE HEAVY METALS DISTRIBUTION IN TSP、PM10、 PM5、PM2. 5 IN URUMQI AT THE EARLY AND LATER OF HEATING PERIOD

From the four typical areas ( industrial zone，transport area，living quarters and scenic spot) in Urumqi， the study used the atmosphere automatic sampler( Lao-ying2050) ， and TSP/PM10 /PM5 /PM2. 5 precietc to collect TSP、PM10、PM5、PM2. 5 in the atmosphere simultaneously． Flame atomic absorption spectrometry and graphite furnace atomic absorption spectrometry was used to measure the concentration of Cd、Pb、Cu、Ni、Zn and Mn in TSP、PM10、PM5、PM2. 5 ． The results showed that: the range of Cd was 0. 52 ～ 10. 72 ng /m3 ; the range of Pb was 25. 66 ～ 356. 87 ng /m3 ; the range of Cu was 12. 57 ～ 173. 93 ng / m3 ; the range of Ni was 1. 85 ～ 78. 22 ng /m3 ; the range of Zn was 67. 58 ～ 431. 49 ng /m3 ; the range of Mn was 18. 87 ～ 310. 20 ng /m3 ． The heavy metal in atmospheric particulates had correlation with wind strength，and the distribution of heavy metals and wind also had a certain relationship．