Imai Yuki, Ikemori Fumikazu, Yoshino Yuri, Ohura Takeshi
Graduate School of Agriculture, Meijo University, 1-501 Shiogamaguchi, Nagoya 468-8502, Japan.
Nagoya City Institute for Environmental Sciences, 5-16-8 Toyoda, Nagoya 457-0841, Japan.
Ecotoxicol Environ Saf. 2023 Jan 1;249:114394. doi: 10.1016/j.ecoenv.2022.114394. Epub 2022 Dec 9.
Chlorinated polycyclic aromatic hydrocarbons (ClPAHs) have been recognized as novel hazardous pollutants; however, the dominant sources remain unclear. This study investigates the occurrences of ClPAHs in five stages of size-segregated particles collected from an urban site and evaluates the sources and factors affecting the concentrations using organic and inorganic source tracers. ClPAHs are the most frequently detected in the finest particle fraction (less than 1.1 µm; PM1.1), similar to polycyclic aromatic hydrocarbons (PAHs), hopanes, and levoglucosan (LEV). The concentrations of total ClPAHs in PM1.1 shows a significant correlation (p < 0.05) with those of total PAHs and specific hopanes but not to LEV and biogenic fatty acids; this suggests that ClPAHs dominantly originate from industrial activities and vehicular emissions. Heatmap analysis, including source tracers, is used to categorize the possible sources of ClPAHs into three types: ClPAH-specific sources, local industrial activities and vehicular emissions, and remote industrial activities. Furthermore, correlation network analysis is used to clarify the relationships between the pollutants.
氯代多环芳烃（ClPAHs）已被确认为新型有害污染物；然而，其主要来源仍不明确。本研究调查了从城市站点收集的不同粒径颗粒物五个阶段中ClPAHs的存在情况，并使用有机和无机源示踪剂评估了影响其浓度的来源和因素。ClPAHs在最细颗粒物组分（小于1.1微米；PM1.1）中检测频率最高，这与多环芳烃（PAHs）、藿烷和左旋葡聚糖（LEV）类似。PM1.1中总ClPAHs浓度与总PAHs和特定藿烷的浓度呈显著相关性（p < 0.05），但与LEV和生物源脂肪酸无关；这表明ClPAHs主要源自工业活动和车辆排放。包括源示踪剂在内的热图分析用于将ClPAHs的可能来源分为三类：ClPAH特定来源、当地工业活动和车辆排放以及远程工业活动。此外，相关性网络分析用于阐明污染物之间的关系。
