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Geoscience ›› 2011, Vol. 25 ›› Issue (2): 393-400.

• Water Resource and Environment • Previous Articles    

Sources Apportionment of PAHs in the Surface Soil of Different Irrigation Areas in Southeast Suburb of Beijing

SHI Yu-Ting,HE  Jiang-Tao,JIN  Ai-Fang   

  1. Beijing Key Laboratory of Water Resources and Environment Engineering, China University of Geosciences,  Beijing100083, China
  • Online:2011-04-25 Published:2011-05-13

Abstract:

Using triangular distribution method, three sampling points were drilled in the sewage irrigation area, reclaimed water irrigation area and irrigation area respectively in the southeast suburb of Beijing. The interval between drill holes is 1 m. Totally 9 samples were collected in the same time, of which 16 kinds of PAHs were analyzed in the lab. The results showed that most of the PAHs were detected in the surface soil of the three irrigation areas mentioned above.  Anthracene and benzo [a] anthracene were not found in the sewage irrigation area; dihydro acenaphthylene and benzo [a] anthracene were not found in the reclaimed water irrigation area; 16 PAHs were all detected in the irrigation area. ΣPAHs were approximately 730 μg/kg, 207 μg/kg and 43 μg/kg respectively in sewage irrigation area, reclaimed water irrigation area and irrigation area. Ratio method, cluster analysis and principal component analysis(PCA) were employed respectively for the PAHs sources apportionment of the study area. The results obtained through ratio method and cluster analysis indicated that PAHs pollution of wastewater irrigation area mostly came from petrogenic source and PAHs pollution of reclaimed water irrigation and the irrigation area was mainly from pyrogenic source. Through the PCA, the contribution rate of various sources of PAHs quantitatively can be calculated. In the sewage irrigation area, the rate of the pyrogenic source/vehicle exhaust and coke source/petrogenic source were 30% and 70% respectively; in the reclaimed water irrigation area, coal combustion, vehicle exhaust emissions and some petrogenic source were the main pollution source of PAHs, of which the contribution rates were respectively 83.2% and 16.8%; in the irrigation area, coal combustion and vehicle exhaust emissions were the main source of PAHs, of which the contribution rates were respectively 83.% and 16.4%.

Key words: PAHs, source apportionment, cluster analysis, principal component analysis, surface soil, irrigation area, southeast suburb of Beijing

CLC Number: