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Urumqi is one of the most serious urban air pollution in China and the world, the situation is more serious pollution in the heating period. In this study, starting from the experimental observations, analysis the Urumqi region PM 10 and PM 2.5 Temporal and spatial variation of the heavy metal content and sources to provide the scientific basis for a reasonable control measures . PM 2.5 , the PM 10 Portable Sampler collected Urumqi five functional areas atmospheric PM 10 and PM 2.5 sample. The results showed that the annual change throughout the sampling period Urumqi atmospheric PM 10 and PM 2.5 , significant seasonal differences, the overall trend: winter> autumn> spring> summer. Clamp Bay Cement is the most polluted the the entire sampling during PM 10 and PM 2.5 mass concentration exceeded all. The remaining sampling points the varying degrees PM 10 and PM 2.5 pollution, but the degree of pollution of the autumn and winter heating period is much higher than in summer and spring non-heating period. PM 10 , PM 2.5 of trend and SO 2 extremely significant, indicating that the PM 10 and PM 2.5 was significantly affected by the heating effects. By graphite furnace atomic absorption spectrometer to detect PM 10 and PM 2.5 sample Cd, Cu, Ni, Pb, Mn five elements content. The results showed that: Urumqi in atmospheric particulate matter, heavy metals easier distribution in the smaller particle size PM 2.5 . The the atmospheric PM 10 and PM 2.5 in the average heavy metal content in different seasons are quite different, which Pb, Cu, Cd, Mn four elements in the concentration of the heating period were higher than those of non-heating period, and Ni in the mean concentration of the non-heating period is higher than the heating period. Clamp Bay Cement PM 10 , PM 2.5 of heavy metals Pb, Cd, Mn concentration average of the largest regional. Xinjiang Agricultural University the living area PM 10 Cu, Ni concentration of heavy metals in the average, the region is also the PM 2.5 Cu in the average mass concentration of the largest regional; friendly road PM 2.5 Ni largest regional average mass concentration of. Most of the heavy metals Pb, Ni, Cu, Cd enrichment factor of four heavy metals in atmospheric PM 10 , PM 2.5 is greater than 10, the sources related to human activities, mainly industrial fuel coal, heating of heating and heating emissions of particulate matter, metal smelting, machinery manufacturing, transportation, etc., but also from crustal materials (such as soil dust). Mn enrichment factor of less than 10 Mn mainly derived from crustal material.
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