Abstract

The quality of atmospheric air of Burgas city, Bulgaria was analyzed in relation to PAHs in two particulate matter fractions – 2.5 μm and 10 μm. It was found that PAHs registered in PM₁₀ represent entirely the ones registered in PM_2.5 – an indication that the particulate PAHs in ambient air of Burgas for the sampling period are associated with the fine PM fraction. The PAH compounds with highest concentrations are mainly associated with coal combustion, diesel and gasoline vehicle and biomass burning, which is further confirmed by the calculated diagnostic ratios. The combustion-derived PAHs represent on average 86.6 ± 2.8% of total PAHs concentration. The linear regression analysis showed strong and statistically meaningful correlations between PM fractions and PAHs indicating the influence of similar local events and emission sources of pollution. PM_2.5 or PM₁₀ relationships with PAHs were significant but lower correlation coefficients were observed for low-molecular weight (LMW) PAHs in comparison to middle-molecular weight (MMW) and higher-molecular weight (HMW) PAHs, due to their lower presence in particulates and higher partition in gaseous atmospheric phase. Further significant correlations were found with wind speed, solar radiation and atmospheric pressure as well as NO₂ and O₃ ambient concentration. The calculated excess cancer risks are twice as much as acceptable limit.

摘要

对保加利亚布尔加斯市的大气空气质量进行了分析，与 PAHs 的两种颗粒物组分（2.5 μm 和 10 μm）相关。发现在 PM ₁₀中登记的 PAHs完全代表在 PM _{2.5中登记的 PAHs}– 表明采样期间布尔加斯环境空气中的颗粒多环芳烃与细颗粒物含量有关。最高浓度的 PAH 化合物主要与燃煤、柴油和汽油汽车以及生物质燃烧有关，计算的诊断比进一步证实了这一点。燃烧衍生的 PAHs 平均占 PAHs 总浓度的 86.6 ± 2.8%。线性回归分析显示 PM 组分和 PAHs 之间存在强烈且具有统计学意义的相关性，表明类似当地事件和污染排放源的影响。下午_2.5或下午₁₀与多环芳烃的关系是显着的，但与中分子量（MMW）和高分子量（HMW）多环芳烃相比，低分子量（LMW）多环芳烃的相关系数较低，因为它们在颗粒物中的含量较低且分配较高在气态大气相。还发现了与风速、太阳辐射和大气压力以及 NO ₂和 O ₃环境浓度的显着相关性。计算出的超额癌症风险是可接受限度的两倍。

抽象的

对保加利亚布尔加斯市的大气空气质量进行了分析，与 PAHs 的两种颗粒物组分（2.5 μm 和 10 μm）相关。发现在 PM ₁₀中登记的 PAHs完全代表在 PM _{2.5中登记的 PAHs}– 表明采样期间布尔加斯环境空气中的颗粒多环芳烃与细颗粒物含量有关。最高浓度的 PAH 化合物主要与燃煤、柴油和汽油汽车以及生物质燃烧有关，计算的诊断比进一步证实了这一点。燃烧衍生的 PAHs 平均占 PAHs 总浓度的 86.6 ± 2.8%。线性回归分析显示 PM 组分和 PAHs 之间存在强烈且具有统计学意义的相关性，表明类似当地事件和污染排放源的影响。下午_2.5或下午₁₀与多环芳烃的关系是显着的，但与中分子量（MMW）和高分子量（HMW）多环芳烃相比，低分子量（LMW）多环芳烃的相关系数较低，因为它们在颗粒物中的含量较低且分配较高在气态大气相。还发现了与风速、太阳辐射和大气压力以及 NO ₂和 O ₃环境浓度的显着相关性。计算出的超额癌症风险是可接受限度的两倍。