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

QIU Zhi-Jun，

LU Rong-Rong，

GUO Pan-Lin，

WANG Ji-Qing，

QIU Hui-Yuan，

LI Xiao-Lin，

ZHU Jie-Qing，

REINERT T，

HEITMANN J，

SPEMANN D，

VOGT J，

FLAGMEYER R H，

BUTZ T

Nuclear Science and Techniques

Vol.12, No.3

pp.215-233

Published in print 01 Aug 2001

CLC：X831, O657.34

27400

A nuclear microprobe with high spatial resolution and high analyti cal sensitivity was applied to analyze atmospheric aerosol at five monitoring sites in Shanghai city. Meantime, a new pattern recognition technique, which used the micro PIXE 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.

Single aerosol particle analysisSource apportionmentNuclear microprobePattern recognition technique

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