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| 摘要: |
| 于2016年对宜兴市大气挥发性有机物（VOC<sub>s</sub>）和臭氧（O<sub>3</sub>）的变化特征进行了分析。结果表明，宜兴市O<sub>3</sub>年均值为62.92 μg/m3 ，其中冬季值最低（31.19 μg/m<sup>3</sup>），夏季值最高（94.96 μg/m<sup>3</sup>）。φ（VOC<sub>s</sub>）为（11.00~42.45）×10<sup>-9</sup>，其中丙酮（12.7%）、乙酸乙酯（8.8%）和丙烯（3.3%）等在VOC<sub>s</sub>中占比位于前3位。各站点φ（甲苯）/φ（苯）>2，全年的φ（甲苯）/φ（苯）> φ（乙苯）/φ（苯）>φ（间、对二甲苯）/φ（苯）。指出VOCs主要来源为有机溶剂和道路交通，并受到一定的外来输送影响。各站点φ（VOC<sub>s</sub>）/φ（NO<sub>x</sub>）为0.94~2.44，O<sub>3</sub>处于VOC<sub>s</sub>敏感区。 |
| 关键词: 宜兴 挥发性有机物 臭氧 |
| DOI： |
| 分类号:X511 |
| 文献标识码:B |
| 基金项目:国家自然科学基金资助项目（91544230） |
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| Study on Concentration Characteristics of O3 and VOCs in Yixing |
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WANG Da chun，CHEN Pu long，HUANG Tu nan，SHU Lei，WANG Ti jian
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| Abstract: |
| In 2016, VOC samples were collected and analyzed in Yixing City, meanwhile, the real-time monitoring of ozone was carried out. The results show that the ozone concentration in Yixing is relatively high and it has obvious seasonal variation. In 2016, the annual concentration of O<sub>3</sub> was 62.92 μg/m<sup>3</sup> in Yixing, where there were the lowest O<sub>3</sub>concentration (31.19 μg/m<sup>3</sup>) in winter and the highest O<sub>3</sub>concentration (94.96 μg/m<sup>3</sup>) in summer. The concentration of VOC<sub>s</sub> was between （11.00~42.45）×10<sup>-9</sup>，acetone（12.7%）, acetate(8.8%) and ethyl propylene(3.3%) made a great contribution to the total VOC<sub>s</sub>. The ratio of Toluene/Benzene of each site was greater than 2, which indicated that the main source of VOC<sub>s</sub> was organic solvent and road traffic. The annual ratios of Toluene/Benzene,Ethylbenzene/Benzene and Xylene/Benzene ranked in a descending order, which showed the concentration of VOC<sub>s</sub> in Yixing was affected by the external transportation. The ratio of VOC<sub>s</sub> to NO<sub>x</sub> was between 0.94~2.44, Yixing was in the VOC<sub>s</sub> sensitive area, which suggested that reduction of VOC<sub>s</sub> may lead to reduction of O<sub>3</sub> level. |
| Key words: Yixing Volatile organic compounds O3 |
