Sources apportionment and carcinogenic risk of polycyclic aromatic hydrocarbons in gas phase of urban Shanghai: Based on high volume solid phase extraction (Hi-volume SPE)
Sources apportionment and carcinogenic risk of polycyclic aromatic hydrocarbons in gas phase of urban Shanghai: Based on high volume solid phase extraction (Hi-volume SPE)
复制标题
上海城区气相多环芳烃来源解析及致癌风险：基于高容量固相萃取（Hi-volume SPE）
DOI：
10.1016/j.ecoenv.2020.110398
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发表时间：
2020
影响因子：
6.8
通讯作者：
Gao Yuan
中科院分区：
文献类型：
--
作者：
Zhang Shengwei;Cai Minghong;Meng Xiangzhou;Gao Yuan
多环芳烃（PAHs）是一种普遍存在的环境污染物，对人类健康构成潜在的严重威胁。分析了上海市某城市大气气相中多环芳烃的组成特征、来源及致癌风险。在2018年5月至10月的温暖月份，使用高容量固相萃取（Hi-volume SPE）技术收集了74个气相样品。16种优先多环芳烃的总浓度（西格玛多环芳烃）的范围为5.54-182.05 ng m（-3）（平均34.47 ng m（-3））和7种致癌多环芳烃的总量（Sigma CPAHs）在0.03-1.49 ng m（-3）之间（平均0.48 ng m（-3）），占Sigma PAHs的1.47%，表明低致癌性。回归分析表明，Sigma PAHs与空气质量、Sigma CPAHs与平均高温呈正相关，与风速呈负相关。正矩阵分解法（PMF）确定了4种可能的来源，分别为石油和产岩源、交通排放、燃煤以及汽油和燃煤混合源，分别占Sigma PAHs的62.84%、19.31%、10.15%和7.69%。据估计，吸入多环芳烃的总体终生肺癌风险（LLCR）处于1.61 x 10（-5）的低风险水平。基于PMF分配的LLCR大小顺序为汽油和煤混合燃烧源（47.07%）>交通排放（35.10%）>石油和石化源（11.06%）>燃煤（6.74%）。本研究证明了大容量固相萃取在收集和分析大气气相中多环芳烃的有效性。
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants, posing potentially serious threats to human health. This study analyzed compositional characteristics, sources, and carcinogenic risks of PAHs in the atmospheric gas phase at an urban site in Shanghai, East China. Seventy-four gas phase samples were collected during the warm months of May-October 2018 using a high-volume solid phase extraction (Hi-volume SPE) technique. The total concentration of sixteen priority PAHs (Sigma PAHs) was in the range of 5.54-182.05 ng m(-3) (average 34.47 ng m(-3)) and the total of seven carcinogenic PAHs (Sigma CPAHs) was in range of 0.03-1.49 ng m(-3) (average 0.48 ng m(-3)), accounting for 1.47% of Sigma PAHs and indicating low carcinogenic potential. Redundancy analyses indicated positive correlations between Sigma PAHs and air quality, and Sigma CPAHs and average high temperature, and a negative correlation between Sigma PAHs and wind speed. Four possible sources, namely petroleum and petrogenic sources, traffic emissions, coal combustion, and mixed gasoline and coal combustion sources, were identified by positive matrix factorization (PMF), accounting for 62.84%, 19.31%, 10.15%, and 7.69% of Sigma PAHs, respectively. The overall lifetime lung cancer risk (LLCR) through inhalation of PAHs was estimated to be at a low risk level of 1.61 x 10(-5). The LLCR based on PMF apportionment decreased in the order of mixed gasoline and coal combustion sources (47.07%) > traffic emissions (35.10%) > petroleum and petrogenic sources (11.06%) > coal combustion (6.74%). This study demonstrates the effectiveness of Hi-volume SPE in collecting and analyzing atmospheric gas phase PAHs.