南京市、苏州市及南通市城区道路扬尘排放特性研究

在江苏南京、苏州和南通三个城市中选取10个采样点,以采集的扬尘样品为研究对象,分析了灼烧减量和扬尘组分.结果表明:南京、南通与苏州元素占比排列基本一致,排列前几位的为Si、Ca、Fe、Al;扬尘化学组分在不同地区有较大差别,南通和苏州扬尘的有机挥发性物质含量较高,城市扬尘主要来源于土壤沙尘的微小颗粒物;同一城市不同用地类型采样点也呈现出一定的规律性,施工区域的SiO2含量最高,商业区和住宅区Al比其他区域高.

Emission Characteristics of Road Dustin Urban Areas of Nanjing,Suzhou and Nantong

Ten sampling points are chosen in Nanjing, Suzhou and Nantong of Jiangsu Province.Dust samples are collected as the research objects, and then analyze the loss on ignition(LOI)and dust components.The results showed that the elements` array of Nanjing, Suzhou and Nantong are almost the same-of which Si, Ca, Fe, Al are at the top.Dust chemical compositions of different regions are very different.The organic volatile impurities of Nantong and Suzhou are relatively high.The dust in urban areas comes mainly from soil dust particles.Sample points indifferent city`s land use types but in the same city also present certain regularity.SiO2 content is highest in construction area, while commercial and residential areas have higher Al content.