Abstract:

Based on the concentration distribution characteristics of inhalable particulate matters during heating period and after heating period of Beijing, the comparison of the concentration of PM₁₀, PM_2.5 and concentration characteristics of Pb in the urban and rural areas of Beijing, as well as the different functional areas in the urban was focused. It was found that the concentration of the inhalable particulate matters was much higher during heating period. It was 1.74 to 2.56 times in the smog weather than the non-smog weather. During heating period, the concentration of Pb was much higher in the PM₁₀ than that in the PM_2.5 and its concentration in the urban areas was higher than the rural areas, especially the concentration of inhalable particulate matters in the building materials factory area was the highest among the functional areas, and the second was the commercial area. After heating period, there was little difference of the concentration of Pb in PM₁₀ and PM_2.5. Although the concentration of Pb in the building materials factory area was still the highest, the concentration in the urban and rural areas has little difference as a whole. It can be estimated that the concentration of Pb in PM₁₀ and in PM_2.5has grown at a rate of 9.78% and 11.45% every year separately by comparing the data of the year of 2007 with 2013’s. Therefore, more attention should be paid to the concentration increase of the Pb in the inhalable particulate matters of Beijing by relevant departments.

Key words: inhalable particles, Pb, concentration distribution, heating period, after heating period, Beijing