Relationship between meteorological conditions and atmospheric PM2.5 in a uranium mining area and analysis of pollution sources

Abstract

Combining the special facilities of uranium mine with villages and towns, this paper analyzed the correlation between PM2.5 and atmospheric temperature, humidity, air pressure, wind speed and air index analyzed by PM2.5. Humidity, atmospheric pressure and air quality index were positively correlated with PM2.5 concentration, while temperature and wind speed were negatively correlated with PM2.5 concentration, while altitude had no correlation with PM2.5 concentration. The seasonal variation of PM2.5 concentration in this area was as follows: winter (31.5 ㎍/m3) > spring (25.78 ㎍/m3) > autumn (15.59 ㎍/m3) > summer (10.61 ㎍/m3). PMF model (orthogonal matrix factor analysis) was used to analyze various pollution sources. It was found that the contribution of various pollution sources was soil source (33.7%), combustion source (19.2%), traffic source (18.2%), industrial source (15.0%) and natural source (3.3%).