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Distribution Characteristics of Platinum Group Elements in Roadside Dust from Daejeon, Korea

대전 도로변 먼지내 Platinum Group Elements의 분포 특성

  • Lim, Jong-Myoung (Environmental Radioactivity Assessment Team, Korea Atomic Energy Research Institute) ;
  • Jeong, Jin-Hee (Department of Environmental Engineering, Chungnam National University) ;
  • Lee, Jin-Hong (Department of Environmental Engineering, Chungnam National University)
  • Received : 2018.05.29
  • Accepted : 2018.08.08
  • Published : 2018.10.31

Abstract

In this research, the distribution of Platinum Group Elements (PGEs) at roadside dust in Daejeon, Korea was examined using an ICP-MS (Inductively Coupled Plasma-Mass Spectrometry) technique. For the quality assurance of the determination, method validation based on its accuracy and precision was conducted using SRM (Standard Reference Material). It was found that the relative errors of Pt, Pd, and Rh against each SRM value were -0.7%, -10.0%, and -20.4%, respectively, while relative standard deviations for three elements were less than 10%. The concentrations of Pt, Pd and Rh in roadside dust averaged as $17.4{\pm}9.2{\mu}g/kg$, $283.6{\pm}20.5{\mu}g/kg$, and $7.3{\pm}2.8{\mu}g/kg$, respectively. The concentrations of Pt and Rh have significantly higher distribution patterns in the dust at roadside and underground parking lot than those in soil of the background or other urban area. The correlation analysis between concentrations of PGEs in roadside dust indicates that the distribution of Pt and Rh concentration were strongly affected by automobile sources.

대기 중 입자상 물질에 대한 자동차 오염원의 지표원소로서 백금족 원소 (Platinum Group Elements, PGEs)에 대한 분석법의 유효성을 검증하고, 도로변 먼지 중 PGEs의 분포 특성을 평가하였다. 인증표준물질을 이용한 유효성 평가 결과, Pt, Pd, Rh의 상대오차는 각각 -0.7%, -10.0%, -20.4%이고 상대표준편차는 Pt, Pd, Rh 모두 10% 미만으로 반복 분석에 따른 재현성이 우수한 것으로 나타났다. 연구대상지역에서 채취한 도로변 먼지 시료 중 Pt, Pd, Rh의 농도는 각각 $17.4{\pm}9.2{\mu}g/kg$, $283.6{\pm}20.5{\mu}g/kg$, $7.3{\pm}2.8{\mu}g/kg$으로 Pd의 농도가 가장 높았다. Pt와 Rh의 농도는 배경지역이나 일반 도시지역의 토양 내 농도에 비해 지하주차장과 도로변 지역의 먼지에서 평균 농도가 상당히 높았고, 이러한 평균농도의 차이는 통계적으로 유의한 것으로 나타났다. 또한, 도로변 먼지에서의 PGEs의 농도 간 상관분석결과, Pd 보다는 Pt와 Rh가 자동차 오염원의 영향을 민감하게 반영하는 것으로 나타났다.

Keywords

References

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