| 成都市大气PM2.5中有机磷阻燃剂的污染水平及来源 |
| 摘要点击 3809 全文点击 1943 投稿时间：2015-03-04 修订日期：2015-05-08 |
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| 中文关键词 有机磷酸酯 阻燃剂 污染水平 来源 PM2.5 |
| 英文关键词 OPEs flame retardant pollution level sources PM2.5 |
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| 中文摘要 |
| 应用气相色谱-质谱联用仪定量分析成都市大气PM2.5中有机磷酸酯阻燃剂(OPEs)的质量浓度水平,讨论了其分布特征,并采用后向气流轨迹模型及相关性分析探析PM2.5中OPEs的来源. 结果表明,成都市市区采样点大气PM2.5中∑7OPEs年平均质量浓度为6.46 ng·m-3,郊区采样点为9.38 ng·m-3. 受郊区废旧物质拆解产业和常年主导风向的影响,郊区采样点大气PM2.5中OPEs的质量浓度高于市区采样点(P=0.013). 大气混合程度影响郊区和市区OPEs的分布,外源污染对成都市OPEs贡献小,OPEs质量浓度高低可能主要受采样点周围局地源的影响. |
| 英文摘要 |
| Organic phosphorus esters(OPEs)in atmospheric PM2.5 in Chengdu city was quantitatively determined by using gas chromatography-mass spectrometry.The distribution characteristic was discussed, back trajectory model and correlation analysis were used to study the sources of OPEs in PM2.5 in Chengdu city.The results showed that the annual average concentration of ∑7OPEs in atmospheric PM2.5 in Chengdu city was 6.46 ng·m-3 for the urban site and was 9.38 ng·m-3 for the suburb site.Due to the waste material recycling industries in the suburb area and the perennial dominant wind direction in Chengdu, the concentration of ∑7OPEs at suburb site was higher than that at urban site(P=0.013).The atmospheric mixed degree influenced the distribution of OPEs in rural and urban area.The source of ∑7OPEs in atmospheric PM2.5 in Chengdu city was mainly from endogenous pollution which was mainly affected by the local sources around the sampling sites, while the contribution of the exogenous pollution was small. |
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