Abstract Thirty-four air samples were collected from 2013 to 2015, at a semi-rural site in Eastern Mediterranean (Island of Crete), to study the atmospheric occurrence of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in the gas and particulate phase. Average levels (gaseous and particulate phase) of PAHs (36 compounds, 11–18 ng/m3), PCBs (49 congeners, 77–93 pg/m3) and OCPs (23 substances, 77–140 pg/m3) were comparable to those reported for similar locations worldwide. Multiple-linear regression analysis, performed to relate atmospheric concentrations with meteorological conditions, revealed as main controlling factors local sources for PAHs and long-range transport (LRT) for PCBs and OCPs. The consideration of parent-metabolite ratios for most OCPs excluded fresh inputs. The application of the potential source contribution function (PSCF) identified Black Sea and eastern Balkans as likely sources for PCBs and OCPs. Significant linear correlations (R2 = 0.79–0.98) were determined between the partitioning coefficients ( log K p ) and partial vapor pressures ( log P L 0 ) for most air samples for PAHs and PCBs excepting OCPs. Slope m r values were close to −1 for PAHs and OCPs indicating gas/particle partitioning close to equilibrium. The corresponding m r values for PCBs were shallower ( log K p - log K o a , did not offer robust evidence for the evaluation of the atmospheric partitioning of the studied compounds. Experimentally determined particle fractions ( φ ) fitted better with the typical remote and rural curves as predicted by the Junge-Pankow model for most PAHs and PCBs but not for OCPs. The K o a - f o m absorptive model could not adequately simulate the measured φ values for the majority of the compounds.

中文翻译：

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东地中海大气中的多环芳烃、多氯联苯和有机氯杀虫剂：调查它们的发生、来源和与气团传输途径相关的气体-颗粒分配

摘要 2013-2015年在地中海东部（克里特岛）的一个半农村地区采集了34个空气样本，研究了多环芳烃（PAHs）、多氯联苯（PCBs）和有机氯农药在大气中的存在情况。 OCP）在气相和颗粒相中。PAHs（36 种化合物，11-18 ng/m3）、PCBs（49 种同系物，77-93 pg/m3）和 OCPs（23 种物质，77-140 pg/m3）的平均水平（气态和颗粒相）与这些报告是针对全球类似地点的。将大气浓度与气象条件联系起来的多元线性回归分析显示，多环芳烃的本地来源和多氯联苯和 OCP 的远距离迁移 (LRT) 是主要控制因素。大多数 OCP 的母体代谢物比率的考虑排除了新鲜输入。潜在源贡献函数 (PSCF) 的应用将黑海和巴尔干东部确定为 PCB 和 OCP 的可能来源。除 OCP 外，大多数空气样本的 PAH 和 PCB 的分配系数 (log K p ) 和蒸气分压 (log PL 0 ) 之间确定了显着的线性相关性 (R2 = 0.79–0.98)。PAHs 和OCPs 的斜率mr 值接近-1，表明气体/颗粒分配接近平衡。PCB 的相应 mr 值较浅（ log K p - log K oa ，并没有为评估所研究化合物的大气分配提供有力的证据。实验确定的粒子分数（ φ ）更适合典型的偏远和乡村曲线正如 Junge-Pankow 模型对大多数 PAH 和 PCB 所预测的那样，但对于 OCP 则不然。