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| 泉州市大气PM2.5中PAHs的污染特征、来源及其健康风险评价 |
| Characteristics, Sources and Health Risk Assessment of PM2.5-bound PAHs in Quanzhou City, Fujian |
| 投稿时间：2018-08-21 修订日期：2018-10-26 |
| DOI：10.14050/j.cnki.1672-9250.2019.47.036 |
| 中文关键词: PM2.5;PAHs;时空分布特征;来源;健康风险评价 |
| 英文关键词: PM2.5;PAHs;temporal-spatial characteristics;sources apportionment;health risk assessment |
| 基金项目: |
| 作者 | 单位 | | 陈璋琪 | 泉州市环境监测站, 福建 泉州 362000 |
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| 中文摘要: |
| 为了解泉州市大气PM2.5中PAHs的污染特征，明确关键污染源，于2016年2月~10月采集了清源山、涂山街、万安和东海四个站点的PM2.5样品，采用前进样口直接热解析气相色谱-质谱联用仪（TD-GC/MS）定量分析了19种多环芳烃（PAHs）的浓度水平，并对其健康风险进行评价。结果表明，采样期间泉州市大气PM2.5中∑PAHs质量浓度为1.98±0.75 ng/m3，显著低于国内大多数城市；呈现冬季 > 春季 > 夏季 > 秋季的季节变化特点，以及涂山街 > 万安 > 东海 > 清源山的空间分布特征。其中，5环PAHs占比最大，为30%~38%，其次为3环，4环和6环，占比分别为18%~27%、22%~25%、和13%~19%。特征比值法分析发现，夏、秋季PAHs受生物质燃烧或煤燃烧的影响大于冬、春季；冬、春季化石燃料燃烧（如机动车排放）的影响较大。大气PM2.5中PAHs对儿童和成人的超额终生致癌风险分别为0.7×10-7和1.4×10-7，不具有致癌风险。 |
| 英文摘要: |
| In order to understand the pollution characteristics and clarify the key pollution sources of PM2.5-bound PAHs, PM2.5 samples were collected at four sites (including Qingyuanshan, Tushanjie, Wanan and Donghai) in Quanzhou during February to October 2016. Total 19 selected PAHs were analyzed by the in-injection port thermal desorption (TD)-gas chromatography/mass spectrometry (GC/MS) procedure, temporal-spatial distribution and health risk assessment of PAHs was evaluated. The concentrations of PM2.5-bound PAHs in Quanzhou were 1.98±0.75 ng/m3, which was significantly lower than most cities in China. Seasonal variation of ∑PAHs concentrations was as following:winter > spring > summer > autumn, and spatial pattern of ∑PAHs pollution was as following:Tushanjie > Wanan > Donghai > Qingyuanshan. PAHs was mainly composed of 5-ring PAH with the percentage of 30%-38%, and the proportion of 3-ring, 4-ring and 6-ring were 18%-27%, 22%-25%, and 13%-19%, respectively. According to PAH diagnostic ratios, coal burning and biomass burning were the major emission sources in summer and autumn, and fossil fuel burning (such as vehicle emissions) was the predominant source in winter and spring. The average lifetime cancer risks of PAHs for children and adults were 0.7×10-7 and 1.4×10-7, respectively. There is no carcinogenic risk of PM2.5-bound PAHs in Quanzhou city. |
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