,Source apportionment of single aerosol particles in the atmosphere of Shanghai city

• 作 者: QIU Zhi-jun LU Rong-Rong GUO Pan-lin WANG Ji-qing QIU Hui-Yuan LIXiao-Lin ZHU Jie-Qing REINERT T HEITMANN J SPEMANN D VOGT J FLAGMEYER R H BUTZ T
• 机 构: Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences,“,”Fakultat für Physik und G
• 出 处: 核技术(英文版)
• 发表日期: 2001年3期
• 关键词: pattern recognition atmospheric aerosol spatial resolution soil dust nuclear mic

A nuclear microprobe with high spatial resolution and high analytical sensitivity was applied to analyze atmospheric aerosol at five monitoring sites in Shanghai city. Meantime, a new patte recognition technique, which used the microPIXE spectrum of a single aerosol particle as its fingerprint, was developed to identify the origin of the particle. The results showed that the major contributors to the atmosphere pollution were soil dust (31.6%), building dust (30.8%), and the next were vehicle exhaust (13.7%), metallurgic industry excrements (5.6%), oil combustion (5%)and coal combustion (2.3%). Besides these, about 10% of the particles could not be identified. Based on the cluster analysis of these particles, they could be divided into eight groups. By inference, they might belong to some sub-pollution sources from soil dust, building dust and metallurgic industry excrements. Moreover, some new pollution sources from tyres and chemical plants were also revealed.