长沙市主要路口交通性污染现状

Status of Traffic Pollution in Main Crossroads of Changsha

目的了解长沙市主要路口交通性污染现状。方法现场监测长沙市6个主要路口噪声、NO2、臭氧 (O3)和总悬浮颗粒物 (TSP)浓度及车流量 ,每天3次 ,连续5d。结果6个主要路口车流量为1203～3715辆/h ,噪声为69～88dB(A) ,NO2 为0.092～0.238mg/m3,O3 为0.238～0.303mg/m3,TSP为0.71～1.47mg/m3;O3 超标率达93%～100% ,平均98%。结论长沙市主要路口噪声和O3 污染最严重 ,交通污染与车流量。

Objective To understand the traffic pollution in main crossroads of Changsha. Methods The levels of noise, NO 2, O 3 and TSP and traffic volumn were monitored in 6 main crossroads of Changsha in situ, 3 times per day, continuously for 5 days. Results The traffic volumns were 1 203～3 715/h, the noise levels were 69～88 dB(A), the levels of NO 2, O 3 and TSP in air of 6 main crossroads were 0.092～0.238 mg/m 3, 0.238～0.303 mg/m 3 and 0.71～1.47 mg/m 3 respectively. The over standard rates were 93%～100% for O 3 with a average rate of 98%. Conclusion The traffic pollution in main crossroads of Changsha mainly induced by noise and O 3, which might be associated with the traffic volumn, the environment around the crossroads and the types of the automobile running in the crossroads.