| 泰安市大气臭氧污染特征及敏感性分析 |
| 摘要点击 2295 全文点击 953 投稿时间：2019-12-06 修订日期：2020-03-04 |
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| 中文关键词 臭氧(O3) 氮氧化物(NOx) 挥发性有机物(VOCs) 特征比值 EKMA曲线 泰安市 |
| 英文关键词 ozone(O3) nitrogen oxide(NOx) volatile organic compound(VOCs) ratios method empirical kinetics modeling approach(EKMA) Taian City |
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| 中文摘要 |
| 2018年5～7月对泰安市城区站点的臭氧及前体物进行在线监测，并基于特征比值法和光化学模型分析了臭氧及前体物的污染特征及臭氧生成对前体物的敏感性.结果表明，观测期间泰安市正遭受较为严重的臭氧（O3）污染，臭氧浓度的日变化呈典型的单峰型变化，15：00左右出现最高值，氮氧化物（NOx）和VOCs的日变化趋势整体呈现夜间高白天低的变化特征.由O3生成效率（OPE）、VOCs/NOx和H2O2/NOz特征比值法及基于EKMA曲线的方法均得出观测期间泰安市大气O3光化学生成偏向于NOx敏感区及过渡区，削减NOx和VOCs均对O3生成具有控制作用.同时基于EKMA曲线的方法还得出在O3前体物浓度减排时按照丙烯等效浓度（PE）与NOx浓度比值为8：3进行VOCs（PE）和NOx削减可以达到O3浓度控制的最佳效果. |
| 英文摘要 |
| Online monitoring of ozone (O3) and its precursors was carried out at urban stations in Taian City from May to July, 2018. The pollution characteristics of O3 and its precursors and the sensitivity of O3 generation to its precursors were also analyzed based on the characteristic ratio method and a photochemical model. The results indicated that Taian City was suffering from serious O3 pollution during the observation period. The daily variation of the O3 concentration exhibited an obvious convex trend with the highest value at approximately 15:00, whereas the concentrations of nitrogen oxide (NOx) and VOCs had decreasing trends during the daytime and increasing trends during the night. It was concluded from the results of the characteristic ratio methods (OPE, VOCs/NOx, and H2O2/NOz) and the empirical kinetics modeling approach (EKMA) curve method that the photochemical generation of O3 in Taian was controlled by the NOx concentration and the transition area, which means that reducing the emissions of NOx and VOCs has a controlling effect on O3 pollution. Additionally, the results of the EKMA curve method also showed that the best effect of O3 concentration control could be achieved by reducing the concentration of O3 precursors, and reducing the concentrations of VOCs (propylene equivalent, PE) and NOx according to a PE:NOx concentration ratio of 8:3. |
