Seasonal Variation and Correlation of Metals and Metalloids Elements in PM_2.5 in Jinan City

Objective To analyze the concentration characteristics and seasonal change of metal and metalloids elements in PM_2.5 to provide a basis for the control of air pollution in Jinan city.

Method PM_2.5 samples were collected from two sampling points, Licheng and Shizhong, on the 10th-16th days of each month in 2016, to determine the concentration of PM_2.5 in air and the concentration of metals and metalloids in PM_2.5 samples by ICP-MS.

Results The mass concentration of PM_2.5 was 79.7 μg/m³, which was higher than that of the second degree of standard limit of ambient air quality. The trend of the concentration of PM_2.5 and the concentration of metals and metalloids in PM_2.5 in the year was reducing gradually, keeping relatively stable, and then gradually increasing, winter > autumn > spring > summer, Licheng > Shizhong.

Conclusions There was an obviously seasonal variation of metals and metalloids in PM_2.5 in Jinan, especially the pollution of PM_2.5 was most affected by meteorological condition in the winter. The prevention and control of air pollution is a systematic project. It is necessary to have a comprehensive control over a long period of time, and to pay more attention to the air pollution in different seasons, as well as to formulate corresponding prevention and control measures for air pollution.