城市绿化带对大气污染的防护效能

研究了长春市城郊绿化带对公路运输产生的重金属的防护效能和吉林市城区绿化带对来自工厂排出的烟尘、有害气体的防护效能。结果表明:城郊绿化带对公路运输产生的重金属具有一定的防护效能,作用距离大约在距公路75m的范围内,尤其在25m范围作用更为明显;城区绿化带对固态和气态的大气污染物均有较强的防护效果,但绿化带的结构不同,防护效果也不同。

Protective Effect of Urban Greenbelt on Air Pollution

An experiment was conducted to study the protective effects of greenbelts on heavy metal from traffic as well as dust and poisonous gases from factories taking the suburb of Changchun City and the city zone of Jilin as study areas.Result shows that the greenbelt in the suburb of Changchun City has a certain protective effect on heavy metal from traffic,and the effective distance is no more than 75 m,especially within 25 m.The greenbelt in the city zone of Jilin also shows a relatively strong protective effect on dust and poisonous gases produced by factories,and greenbelts with different structures exhibit various effect.