한국지하수토양환경학회지:지하수토양환경 (Journal of Soil and Groundwater Environment)

  • 제22권5호
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  • Pages.89-97
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  • 2017
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  • 1598-6438(pISSN)
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  • 2287-8831(eISSN)
한국지하수토양환경학회 (Korean Society of Soil and Groundwater Environment)
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오염원에 따른 토양 입경 별 비소의 오염특성 및 생물학적 접근성 평가

Effects of Contamination Source and Particle Size on Arsenic Speciation and Bioaccessibility in Soils

  • 권예슬 (국립목포대학교 환경공학과) ;
  • 김은정 (국립목포대학교 환경공학과)
  • Kwon, Ye-Seul (Department of Environmental Engineering, Mokpo National University) ;
  • Kim, Eun Jung (Department of Environmental Engineering, Mokpo National University)
  • 투고 : 2017.08.25
  • 심사 : 2017.09.20
  • 발행 : 2017.10.31
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초록

In this study, we evaluated effect of particle size on arsenic solid-state speciation and bioaccessibility in soils highly contaminated with arsenic from smelting and mining. Soils were partitioned into six particle size fractions ($2000-500{\mu}m$, $500-250{\mu}m$, $250-150{\mu}m$, $150-75{\mu}m$, $75-38{\mu}m$, <$38{\mu}m$), and arsenic solid-state speciation and bioaccessibility were characterized in each particle size fraction. Arsenic solid-state speciation was characterized via sequential extraction and XRD analysis, and arsenic bioaccessibility was evaluated by SBRC (Solubility Bioaccessibility Research Consortium) method. In smelter site soil, arsenic was mainly present as arsenic bound to amorphous iron oxides. Fine particle size fractions showed higher arsenic concentration, but lower arsenic bioaccessibility. On the other hand, arsenic in mine site soil showed highest concentration in largest particle size fraction ($2000-500{\mu}m$), while higher bioaccessibility was observed in smaller particle size fractions. Arsenic in mine site soil was mainly present as arsenolite ($As_2O_3$) phase, which seemed to affect the distribution of arsenic and arsenic bioaccessibility in different particle size fractions of the mine soil.

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참고문헌

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