농림지역의 대기 및 토양매체에 의한 PAHs 오염원 동정(同定)

Abstract

Polycyclic aromatic hydrocarbons (PAHs) are serious and ubiquitous environmental contaminants. Besides some of PAHs, including Benzo[a]pyrene (BaP) and so on, were indicated mutagen and carcinogen, namely Endocrine Dis-ruptors (EDs) in view of the environmental toxicology In this study, Ambient air samples, which were sampled in summer and winter, and 28 soil samples were collected to investigate 16 polycyclic aromatic hydro -carbons (PAHs) including the 6 carcinogenic PAHs in agriculture and forestry area in 2007. Two emission gas samples from incinerator which is considered as the only point source in the study area also were sampled to compare with these samples. These samples were analyzed by gas chromatography/mass spectrometer (GC/MS). Total concentrations of PAHs in ambient air were 35.94 ng/Sm3 and 140.99 ng/Sm3 in summer and winter, respectively. Moreover 6 carcinogenic PAHs concentrations were 7.67 ng/Sm3 and 22.5 ng/Sm3, respectively. Total concentrations of PAHs in soil samples ranged 68.99 to 6730.95 ng/Sm3 and concentration of carcinogenic PAHs was 71.26 ng/Sm3 on the average. Total concentration of PAHs in emission gases were much higher than other samples with the value 182.99 ng/Sm3 and 547.55 ng/Sm3. Specific PAHs compound ratio, such as Anthracene/Phenanthrene and Fluoranthene/(Fluoranthene+Pyrene), Indeno[1,2,3-c,d]pyrene/(Indeno[1,2,3-c,d] pyrene+Benzo[g.h.i]pyrene) and Fluoranthene/(Fluoranthene+Pyrene) were used to identify the origin of PAHs contamination in the samples. This result showed that there is little correlation between emission gas samples and the other samples. Moreover, PAHs in ambient air and soil were originated from grass/wood/coal considering as agricultural wastes combustion from agriculture and forestry area.