摘要
为了解郑州市道路交通高峰期大气中臭氧浓度的分布特征,选取5个监测点于早上(08:00—09:00)、中午(12:00—13:00)、下午(17:00—18:00)3个监测时段对大气臭氧浓度进行监测。结果表明:早上(08:00。09:00)和中午(12:00~13:00)监测时段大气臭氧平均浓度低于《环境空气质量标准》(GB3095—2012)中规定的臭氧1h平均浓度2级标准的限值(0.20mg/m^3),而下午(17:00~18:00)臭氧平均浓度高于该限值,3个监测时段臭氧浓度的超标率分别为53.3%、53.3%、80.0%。不同监测时段之间臭氧浓度差异有统计学意义。5个监测地点中有4个测定地点的臭氧平均浓度均超过0.20mg/m^3,臭氧浓度的超标率分别为77.8%、77.8%、66.7%、55.6%、44.4%。5个监测地点中大气臭氧浓度之间差异无统计学意义。郑州市区大气环境存在一定的臭氧污染问题,有待进一步加强监测和防治。
To provide the basic data of distribution characteristics of atmospheric ozone concentration during road traffic peak hours, ozone concentration was determined in spring in Zhengzhou City. Three monitoring periods (08:00- 09:00, 12:00-13:00, 17:00-18:00) and five monitoring points were selected to determine the ozone concentration. Results showed that the average ozone concentrations during 08:00-09:00 and 12:00-13:00 were below the hourly average concentration of the grade two standard(0.20 mg/m^3) according to the Ambient Air Quality Standard (GB3095- 2012), and the average ozone concentration during 17:00-18:00 was higher than the value of grade two standard. The ozone concentration in 3 monitoring periods exceeded the standard by 53.3%, 53.3% and 80.0%, respectively. There was significant difference among ozone concentrations of the 3 monitoring periods. The mean ozone concentration at 4 out of 5 monitoring points was higher than the standard value(0.20 mg/m3). The rates of ozone concentration in the 5 monitoring points exceeded the standard by 77.8%, 77.8%, 66.7%, 55.6% and 44.4% respectively. There was no significant difference among ozone concentrations of 5 monitoring points. There are some ozone pollution problems in the atmospheric environment of Zhengzhou City and monitoring and prevention should be strengthened.
出处
《城市环境与城市生态》
CAS
2013年第5期37-39,共3页
Urban Environment & Urban Ecology
基金
河南省教育厅自然科学基金(12B330004)
郑州大学大学生创新训练计划(2012cxsy131)