郑州市区和郊区道路交通高峰期臭氧浓度分析

Ozone Concentration in Downtown and Suburb of Zhengzhou City during Traffic Peak Hours

为了解郑州市道路交通高峰期臭氧污染状况,探索郑州市区和郊区臭氧浓度分布规律,分别于道路交通早高峰期(08:00—09:00)和晚高峰期(17:00—18:00),对郑州市区和郊区的2个监测点进行地面臭氧浓度监测。结果显示郑州市区和郊区监测点交通高峰期臭氧平均浓度分别为278(166,364)μg/m^3、225(0,407)μg/m^3,均超过国家二级标准限值200μg/m^3。2个监测点晚高峰平均臭氧浓度343(214,429)μg/m^3和超标率77.4%均高于早高峰171(0,321)μg/m^3和48.4%,差异有统计学意义(P<0.05)。从而表明郑州市大气中存在一定的臭氧污染,且交通晚高峰污染重于早高峰,需进一步防治。

To investigate the status and regularity of ozone pollution, ozone concentration was monitored at two sites located in the downtown and suburb of Zhengzhou City in traffic peak hours for one year. The results showed that ozone concentrations in the downtown and suburb were 278（166,364） μg/m^3 and 225（0,407） μg/m^3, respectively, and both exceeded the national safety standard 200 μg/m^3. The average ozone concentration [343（214,429） μg/m^3] and over-limit ratio 77.4% in the evening peak period were both significantly higher than those in the morning peak period171（0,321） μg/m^3, and 48.4%（P0.05）. There was atmospheric ozone pollution in Zhengzhou and it was more serious in the evening peak period than in the morning peak period. Therefore, control measures should be strengthened.