For 26 soil series distributed more than 1% among 63 soil series in Jeju Island, natural uncultivated soil samples were collected. For these soils, the chemical speciation of eight heavy metals (Cd, Cr, Cu, Mn, Ni, Pb, V, and Zn) was examined. Further, the Plant Bioavailability (PB) and Mobility Factor (MF) of these heavy metals were evaluated using Tessier’s 5-step sequential extraction method (exchangeable, carbonate, reducible (bound to Fe/Mn oxides), oxidizable (bound to organic matter), and residual fraction). The main form present was residual fraction for Cd and Zn; residual and oxidizable fractions for Cr, Cu, Ni, and Pb; reducible fraction for Mn; and carbonate fraction for V. The average plant availability and average mobility factor were found to be V (57.37%) > Zn (12.49%) > Cd (11.76%) > Cu (11.19%) > Pb (9.37%) > Cr (9.09%) > Mn (3.13%) > Ni (2.63%), and Mn (61.04%) > V (59.94%) > Zn (31.54%) > Cd (17.65%) > Cr (15.66%) > Ni (13.89%) > Pb (13.80%) > Cu (13.53%), respectively.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 시료채취 및 전처리
  2.2. 실험 방법
 3. 결과 및 고찰
  3.1. 채취 토양의 물리화학적 특성
  3.2. 토양 중 중금속의 화학적 형태
  3.3. 토양 중 중금속의 생물학적 이용률 및 이동성 평가
 4. 결 론
 REFERENCES

• 현성수(제주특별자치도 보건환경연구원) | Sung-Su Hyun (Research Institute of Health & Environment, Jeju Special Self-Governing Province)
• 김세라(제주특별자치도 보건환경연구원) | Se-Ra Kim (Research Institute of Health & Environment, Jeju Special Self-Governing Province)
• 이민규(부경대학교 화학공학과) | Min-Gyu Lee (Department of Chemical Engineering, Pukyong National University)
• 감상규(제주대학교 환경공학과) | Sang-Kyu Kam (Department of Environmental Engineering, Jeju National University) Corresponding author