Abstract:

The contents of polynuclear aromatic hydrocarbons(PAHs) in tar and smog of burned coal produced in 7 different areas have been measured using threedimensional fluorescent method. The range of PAHs in coal tar is from 0.201~0.419 mg/g and in coal smog is from 1.1~3.2 μg/g. Scavenging capacity for PAHs in coal smog by β-CD solution was determined to be 65.6%. The results showed that:PAHs contents of coal smog is different as the origin of coal varies. The PAHs content in coal tar is in the order of 10-5 mol/L, and more than that (in the order of 10-7 mol/L) in coal smog. As the producing area varies, the scavenging rates of PAHs in coal smog by β-CD solution is also different, the average scavenging rate of 7 kinds of selected coals was 38.4%. Hence, it is hopeful that the β-CD solution can be used as an effective removal agent for PAHs in coal smog.

Key words: Three-dimensional fluorescence, Coal extracts, PAHs, Phenanthrene, Scavenging rate