杭州市下沙地区PM2.5浓度监测与分析

PM2.5 concentration monitoring and analysis in Hangzhou Xiasha region

利用便携式的空气质量检测仪,对杭州市下沙地区五条道路及三个小区进行了PM2.5的测量.2010年下沙道路PM2.5的质量浓度在40～136μg/m3,2012年道路PM2.5为18～67μg/m3,说明下沙地区空气质量近年得到改善.同时还对不同空间分布的道路与小区空气质量进行了对比,五条道路按空气质量由好到坏依次为:沿江边的之江东路、高教园学源街、靠近商业区文渊路、途经高架桥的学林街以及靠近工业区的围垦街.三个小区空气质量由好到坏依次为:居住密集区内的小区、高教园周边小区、商业区周边小区.分析了影响PM2.5的因素,认为道路上汽车排放的尾气是小区的污染源之一,而天气因素对PM2.5的多寡有很大影响.

PM2.5 concentration was measured on five roads and three residential districts of Hangzhou Xiasha region by portable air quality detector.PM2.5 concentration of roads ranged between 40 μg/m3 and 136 μg/m3 in 2010.In 2012,the value ranged between 18 μg/m3 and 67 μg/m3.Therefore,air quality was improved in recent years in Xiasha region.Different spatial distribution of roads and districts was also compared.The air quality of five roads ranging from good to bad was listed as follows: the east of Zhijiang Road along the Qiantang river,Xueyuan Street in the higher educathon zome,Wenyuan Road near the business district,Xuelin Street passing through the viaduct,and Weiken Street near the industrial area.The air quality of three districts ranging from good to bad was listed as follows: intensive residential districts,districts around the hugher education zone,and districts near the business area.In the meantime,the causes affecting PM2.5 concentration were amalyzed.Automobile exhaust was the source of pollution in residential districts.Weather had a significant impact on the PM2.5 concentration.