Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Investigation of Pollution of Polycyclic Aromatic Hydrocarbons and Heavy Metals in Soil near Railway Rails

철도레일 부근 토양의 다환방향족 탄화수소 및 중금속 오염도 조사

  • Choi, Hyun-Kyung (GyeongSangBukdo Goverment Public Institute of Health and Environment) ;
  • Yoon, In-Ju (GyeongSangBukdo Goverment Public Institute of Health and Environment) ;
  • Shin, Tae-Cheon (Department of Environmental Engineering, Andong National University) ;
  • Kim, Young-Hun (Department of Environmental Engineering, Andong National University)
  • 최현경 (경상북도 보건환경연구원) ;
  • 윤인주 (경상북도 보건환경연구원) ;
  • 신태천 (안동대학교 환경공학과) ;
  • 김영훈 (안동대학교 환경공학과)
  • Received : 2018.05.08
  • Accepted : 2018.07.10
  • Published : 2018.11.30
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Abstract

Trains have been a major means of transport in Korea during these past decades. However, train facilities such as stations and repair shops are contaminated with organic and inorganic substances. There is a high probability of train facility contamination with polyaromatic hydrocarbons (PAHs). This study evaluated the PAH and heavy metal contamination of soil near railroads in the Kyungpook area. A total of 18 soil samples were collected from the railroads and analyzed for 16 PAHs and 6 heavy metal species. The contamination level of the top soil was found to be slightly higher than that of the subsoil for contamination with PAHs. The ratio of carcinogenic PAH concentration to the total PAH concentration was relatively high, with a maximum of 0.9. The toxicity equivalent (TEQ) of the PAHs were 500.6 ng/kg in the topsoil and 355.5 ng/kg in the subsoil. The ratio of low molecular PAHs (LPAHs) to high molecular PAHs (LPAHs) ranged from 6.7 to 29.5; this shows that contamination is primarily due to combustion of fuel rather than due to petroleum. The ratio of phenanthrene to anthracene and the ratio of fluoranthene to pyrene also show that contamination occurred due to combustion for transportation. The heavy metal contamination level was lower than the Korean standard, but higher than the background concentration; this indicates that the soil was affected by the operation of the railways.

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