Polycyclic Aromatic Hydrocarbons (PAHs) in Korean Soil: Distribution by Depth and Land Use

토양깊이 및 토지이용에 따른 다핵방향족탄화수소 (PAHs)의 토양 중 분포

  • Nam, Jae-Jak (Agricultural Environment Department, NIAST, RDA) ;
  • Hong, Suk-Young (Agricultural Environment Department, NIAST, RDA) ;
  • Lee, Jong-Sik (Agricultural Environment Department, NIAST, RDA) ;
  • So, Kyu-Ho (Agricultural Environment Department, NIAST, RDA) ;
  • Lee, Sang-Hak (Department of Chemistry, Kyungpook National University)
  • 남재작 (농업과학기술원 농업환경부) ;
  • 홍석영 (농업과학기술원 농업환경부) ;
  • 이종식 (농업과학기술원 농업환경부) ;
  • 소규호 (농업과학기술원 농업환경부) ;
  • 이상학 (경북대학교 화학과)
  • Published : 2007.06.30

Abstract

Polycyclic aromatic hydrocarbons(PAHs) have been analyzed to assess vertical distribution of them with different land uses. The soils were collected from three layers; surface $(0{\sim}5cm)$, intermediate $(6{\sim}10cm)$, and deep $(11{\sim}15cm)$ layer, respectively considering land use; paddy, upland, and mountain in each site. Total 89 samples of soil from 10 sites were analyzed. Overall mean of ${\sum}PAHs$ were 137 (range $8.87{\sim}625{\mu}g\;kg^{-1}$), 203 (range $16.5{\sim}645{\mu}g\;kg^{-1}$), and $83.4{\mu}g\;kg^{-1}$ (range $6.65{\sim}667{\mu}g\;kg^{-1}$) for paddy, upland, and mountain soil, respectively. The dominant PAHs were fluoroanthene/benzo(b)fluoroanthene>pyrene>indeno(1, 2, 3-cd) pyrene in paddy, fluoroanthene/pyrene>benzo(b)fluoroanthene>chrysene in upland, and benzo(b)fluoroanthene>pyrene>chrysene in mountain soil, whereas the profile was quite similar for each other except that indeno(1, 2, 3-cd)pyrene and benzo(ghi)perylene are relatively higher in the paddy soils. Although the concentration gradient by depth was not observed in the paddy and upland soils because perturbation of soil layer by tillage, significant decrease was in the deep layer relative to the surface and intermediate layer. However, the concentration gradient of PAHs by soil depth was clearly shown in mountain soil without experiencing disturbance of tillage.

Keywords

References

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