Journal of East China Normal University(Natural Sc ›› 2015, Vol. 2015 ›› Issue (3): 136-145.doi: 10.3969/j.issn.1000-5641.2015.03.016

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Study of spatial distribution and spread of heavy metals in urban soil based on synthetic PCA model

JIANG Shi-quan 1,2,LIU Zhong-xia1,JIANG Shi-ping3   

  • Received:2014-03-01 Online:2015-05-25 Published:2015-05-28

Abstract: In this paper, soil samples were collected from five different functional areas of a city, and concentrations of eight heavy metals contained in each soil sampling were tested by X ray fluorescence spectrometer. PCA was applied to investigate categories of main heavy metals in contaminated areas and determine the respective contribution of eight heavy metals to contamination in each functional area. Based on output coefficients of the PCA model, the functional relationship between the concentration of each heavy metal and its spatial distribution in each functional area is established and an equation that describes spreading features of heavy metals is constructed. Targets for pollution control and countermeasures can thus be found.

Key words: Xray fluorescence analysis, principal component analysis, heavy metal pollution

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