| 摘要: |
| 2013年10月对广东鹤山大气中挥发性有机化合物（VOCs）变化特征、臭氧生成潜势和来源进行了研究。结果表明，观测期间测得的VOCs总平均值为26.6×10-9，表现为烷烃＞苯系物＞烯烃；烯烃日间值变化幅度较大，在清晨达到最大值；苯系物与一次污染物CO的变化趋势十分接近；烷烃的峰值出现时间较苯系物有所提前，且在短时间内迅速升高，表明观测点周边可能存在排放源；大气中各类VOCs的臭氧生成潜势（OFP）贡献表现为苯系物＞烯烃＞烷烃；从物种来看，乙烯等10种物质对总OFP的贡献占到了80.4%；观测期间测得的OFP贡献较大的VOCs物种主要来源于石化源、油漆溶剂和汽油挥发源。 |
| 关键词: 挥发性有机化合物 臭氧生成潜势 来源解析 鹤山 |
| DOI： |
| 分类号:X515 |
| 基金项目: |
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| Potential Ozone Formation and Emission Sources of Atmospheric VOCs in Heshan during Typical Pollution Episode |
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周炎1,钟流举1*,岳玎利1,曾立民2,张涛1
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| Abstract: |
| Atmospheric VOCs was measured at Heshan in October 2013. The variation pattern, ozone formation potential and emission sources were analyzed. Average concentration of total VOCs observed was 26.6×10-9, while alkane＞BTEX＞alkene. Concentration of alkene peaked at early morning with large variations during the daytime; variation patterns of BTEX and CO were quite similar; concentration of alkane peaked earlier than BTEX and rised rapidly in a very short time, which indicated the influence of nearby emission sources. Ozone formation potential calculation by the speciated VOCs appeared as BTEX＞alkene＞alkane. 10 key VOCs species including ethylene contributed 80.5% of total OFP;VOCs contributed most of OFP were mainly came from petrochemistry, paint solvents and gasoline vapor during observation. |
| Key words: VOCs Ozone formation potential Source apportionment Heshan |
