The impact of heating season factors on eight PM2.5-bound polycyclic aromatic hydrocarbon (PAH) concentrations and cancer risk in Beijing
The impact of heating season factors on eight PM2.5-bound polycyclic aromatic hydrocarbon (PAH) concentrations and cancer risk in Beijing
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DOI：
10.1016/j.scitotenv.2019.06.149
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发表时间：
2019-10-20
影响因子：
9.8
通讯作者：
Wang, Qin
中科院分区：
文献类型：
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作者：
Chang, Junrui;Shen, Jianing;Wang, Qin
2015年，北京市在5个采样点采集了443个大气PM2.5样品。通过高效液相色谱法（HPLC）测定PM2.5结合PAH（8）（Chr、BaA、BbF、BkF、B[a]P、DBA、BghiP和IND）的浓度。分析了PM2.5结合PAH（8）的年浓度、终生癌症风险以及由于供暖季节因素（供暖和气象条件）而增加的值。结果表明，采暖季PM2.5结合的PAH（8）总浓度为72.6 ng/m3，高于非采暖季的4.77 ng/m3;年浓度为10.6 ng/m3，由于采暖季节因素，增加了5.83 ng/m3。B[a]P年浓度为1.67 ng/m3，超过了1 ng/m3的限值，是非采暖季的152倍。非采暖季柴油车和汽油车是PAH（8）的主要来源，采暖季柴油车、汽油车和燃烧的混合源是PAH（8）的主要来源。最显著的健康危害污染物是B[a]P，其在采暖季、非采暖季和2015年全年分别占PAH（8）的B[a]P当量浓度（B[a]Peg）的72%、74%和69%。终生癌症风险为2.67 × 10 ~（-6），由于采暖季节因素增加了1.36 × 10 ~（-6）。因此，供暖季节因素几乎使PM2.5结合的Sigma PAH（8）的年浓度和终生癌症风险增加了一倍。结果表明，控制采暖季PM2. 5结合的多环芳烃（8）排放，尤其是B[a]P的排放，对保障人体健康至关重要。(C)2019 Elsevier B. V.版权所有。
In 2015, 443 atmospheric PM2.5 samples were collected at five sampling sites in Beijing. The concentrations of PM2.5-bound PAH(8) (Chr, BaA, BbF, BkF, B[a]P, DBA, BghiP, and IND) were determined via high performance liquid chromatography (HPLC). The annual concentration of PM2.5-bound PAH(8), lifetime cancer risk, and the increasing value due to heating season factors (heating and meteorological conditions) were analyzed. The results showed that the sum concentration of PM2.5-bound PAH(8) during heating season was 72.6 ng/m(3) and higher than the non-heating season concentration of 4.77 ng/m(3). The annual concentration was 10.6 ng/m(3), which increased 5.83 ng/m(3) due to heating season factors. The B[a]P annual concentration was 1.67 ng/m(3) and higher than the limit of 1 ng/m(3), which was 152 times that of non-heating season. Diesel vehicles and gasoline vehicles were the primary PAH(8) sources during non-heating season, while the mixed sources of diesel vehicles, gasoline vehicles, and combustion were the dominant PAH(8) sources during heating season. The most significant health hazard pollutant was B[a]P, which accounted for 72%, 74%, and 69% of the B[a]P equivalent concentration (B[a]Peg) of PAH(8) during heating season, non-heating season, and throughout 2015, respectively. The lifetime cancer risk was 2.67 x 10(-6), which increased 1.36 x 10(-6) due to heating season factors. Therefore, heating season factors nearly doubled the annual concentration of PM2.5-bound Sigma PAH(8) and lifetime cancer risk. The results indicated that to protect human health, it is very important to control PM2.5-bound Sigma PAH(8) emissions during heating season, especially B[a]P emissions. (C) 2019 Elsevier B.V. All rights reserved.