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PM--SSOCIATED PAHs DURING WINTER IN BURGAS, BULGARIA
Abstract
The rapid development and industrialization in recent years have posed a great challenge to the environment and air quality due to the increased anthropogenic emissions of particulate matter. Both PM2.5 and PM10 (particulates with aerodynamic diameters equal or less than 2.5 and 10 ?m, respectively) have become the forefront focus due to their adverse effect on human health and climate. Therefore, the assessment of chemical composition of PM2.5 and PM10 defining in general their toxicity and its correlation with meteorological parameters are worth to consider. The aim of the current study is to determine the concentration of 19 polycyclic aromatic hydrocarbons (PAHs), in airborne PM2.5 and PM10 collected in the urban area of Burgas, Bulgaria, to investigate the PAH relationship between these two particle fractions and correlation of their concentrations with meteorological parameters. Twenty-four-hour samples of PM10 and PM2.5 particle fraction were collected on quartz filters using air sampler OPSIS SM200 with flow rate about 2.3 N m3 h-1. The fractions were sampled in January, 2020, and the recovered through ultrasound-assisted extraction PAHs were analyzed by GC?MS in SIM mode. The obtained results revealed that for the studied period the mean PAHs PM2.5 and PAHs PM10 concentrations are respectively 14.5 ng m-3 (RSD=53.8%) and 13.8 ng m-3 (RSD=51.9%) and represent about 0.14% and 0.06% of the weight of PM2.5 and PM10, respectively. In fact, PM2.5, PM10, PAHs PM2.5 and PAHs PM10 concentrations correlate well with each other. With regards to meteorological parameters, a good linear correlation is registered with solar radiation and wind speed.
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