Research On The Distribution Of Heavy Metals In Fine Particles In The Atmosphere Of Different Cities

In order to explore the present situation of fog and haze pollution in Northeast region,Jilin and Baishan City are selected as the typical research objects in this paper.The samples which are consist of two city's PM_2.5 particles in ambient air are collected in heating and non-heating periods,the sample has pretreatmented by electrothermal plate digestion method,the concentrations of metals were measared by ICP-MS.So anylyzing the temporal and spatial distribution,correlation and the sources of two fine particulate matters of heavy metals in PM_2.5 which are between the different city's environmental air as Jilin and Baishan.The results show that:Jilin City,the city's annual average PM_2.5 concentration of 66?g/m³,the average concentration of 89?g/m³ heating periods,the average concentration of non-heating periods of 33?g/m³;The main heavy metal elements are 10 elements such as K,Al,Na,Zn,Ca,Mn,Pb,Mg,Cu,As.The concentration of PM_2.5 in Jilin City and the concentration of heavy metals in PM_2.5 are both higher than the non-heating period in the heating period;in terms of spatial distribution,they are Hadawan?industrial district?>Nine Station?New Industrial Park?>Power Institute?Culture and education area?>Institute of Chemical Engineering?mixed area?>Jiangnan Park?leisure area?>Fengman?contrast area?>Dongjuzi?residential area?.Baishan City,the city's PM_2.5 annual average concentration of 73?g/m³,the average concentration of 108?g/m³ in heating period,the average concentration of non-heating period of 47?g/m³;the 10 elements,such as Ca,Fe,K,Al,Na,Mg,Zn,Cu,Pb,Ba,are the main elements in the Baishan City PM_2.5.The concentration of PM_2.5 in Baishan City and the concentration of heavy metals in PM_2.5 are both higher than the non-heating period in the heating period;in terms of spatial distribution,they are Jingang cement plant?industrial area?>Party School?traffic area?>Train station?cultural and educational area and residential area?>Meteorological Observation Station?mixed area?>Baishan City Environmental Protection Bureau?mixed district office area?>Xifeng?new industrial area?.According to the temporal and spatial distributed law of heavy metals in Jilin and Baishan City,the heating periods are higher than the non-heating periods.The pollution in industrial area,traffic area and mixed area is more serious than that in residential area.The concentration of PM2.5 in Baishan City and the concentration of heavy metals in PM2.5 were higher than that in Jilin.In two cities,the types and concentrations of heavy metals in heating and non-heating periods are completely different.The concentrations of Ca,Al,Mg,Fe,Mn and Pb in Baishan City are much higher than those in Jilin.These elements are derived from the building pollution,coal and iron and steel industry.The concentration of Ca in Baishan City is relatively high,not only the construction activity are frequently but also exists the production cement enterprise.The environmental air quality of Jilin is better than that of Baishan City in the investigation stage.