南京长江三桥光催化功能性混凝土路去除汽车排放氮氧化物的研究

Removal of Nitrogen Oxides in Vehicular Emissions on Photo-catalyst-treated Portland Cement Concrete Road of Nanjing No.3 Yangtze River Bridge

基于试验室研究结果,将纳米二氧化钛浆液进行放大处理并喷洒在南京长江三桥桥北收费站广场的混凝土路面铺制现场,三桥通车后,对该段光催化功能性混凝土路光催化氧化去除汽车尾气中氮氧化物的效果进行测评。结果表明,桥南段氮氧化物浓度在一年之内波动范围为95μg/m3至165μg/m3,桥北段则为25μg/m3至80μg/m3,说明经过光催化组分处理的混凝土路面对汽车排放尾气中氮氧化物有较明显的去除效果,可以推广应用。

Based on laboratory experiments,nano-TiO2 photo-catalyst composites were sprayed on the square north of the toll station of Nanjing No.3 Yangtze river bridge in China to evaluate the photo-catalysis effect of nitrogen oxides reduction on concrete road.The nano-TiO2 photo-catalyst composite fixed on concrete road of the north toll square helped to control the nitrogen oxides concentrations at 25～80 μg/m3 during one year(at the same time the south square at 95～165 μg/m3).The preparation of Portland cement concrete road with a function of removing vehicular emissions is recommended for use in China.