泰州市道路机动车尾气污染环境调查与分析

为模拟光催化路面现场工况,对泰州市道路典型路段机动车尾气污染环境进行调查。讨论了日照时数、月均气温、极端高温、极端低温、空气相对湿度等气象参数的变化范围,分析了光催化路面后续研究的试验条件,检测了工作日和周末两个时段下交叉口与路段中的机动车尾气污染情况,研究了尾气中污染气体NO、HC、CO浓度随时刻的变化规律。结果表明:交叉口处机动车尾气污染程度比路段中严重得多,在交叉口交通高峰时刻尾气中各污染气体的浓度也达到峰值。建议后续研究采用交叉口峰值浓度尾气的混合模拟气体,而非单一污染气体,以便能更准确地反映实际道路机动车尾气污染状况。在交叉口范围内铺筑光催化路面,可以在控制成本的基础上最大限度地发挥其防治空气污染的作用。

Investigation and Analysis of Road Automobile Exhaust Gas Pollution Environment in Taizhou

In order to simulate field conditions of the photocatalytic pavement, the environment of automobile exhaust gas pollution at the typical road section in Taizhou was investigated. The change ranges of meteorology parameters, such as sunshine time, monthly average temperature, extreme high temperature, extreme low temperature and air relative humidity, were discussed. The test conditions of the further photocatalytic pavement research were analyzed. The state of automobile exhaust gas pollution at two positions including the intersection and the road in the workday and weekend was detected. The concentration change rules of various pollution gases including NO, HC, and CO in automobile exhaust gases with time were studied. The result shows that the automobile exhaust gas pollution at the intersection is much greater than which in the middle of the road. The concentrations of various pollution gases attain their maxima at the intersection during traffic rush hours. In order to reflect more accurately the real situation of the road automobile exhaust gas pollution, a hybrid gas simulating the exhaust gas with the peak concentration at the intersection rather than a single pollution gas will be recommended to adopt in the follow-up study. It can play an active role in the air pollution control to the most extent on the base of controlling cost that the photocatalytic pavement is constructed only in the range of intersection.