Leaching Behavior of Arsenic and Heavy-Metals and Treatment Effects of Steel Refining Slag in a Reducing Environment of Paddy Soil

논토양의 환원환경에서 비소 및 중금속의 용출특성과 제강슬래그의 처리효과

  • Received : 2016.04.08
  • Accepted : 2016.05.02
  • Published : 2016.05.31


There have been only a few studies focused on the stabilization of metal (loid)s in anaerobic soils such as paddy soils. In this study, laboratory-scale column tests were conducted to artificially manipulate anoxic conditions in submerged paddy fields and we observed the release behavior of As, Cd, Pb, and Zn, as well as to examine the stabilization effect of steel refining slag (SRS) on the metal(loid)s. The leachate samples were collected and chemical parameters were monitored during the test period. Results suggest that anoxic conditions were developed during submersion, and that As or heavy metals (particularly Cd) fractions bound to ferrous (Fe) /manganese (Mn) oxides were easily dissociated. Moreover, As is also reduced by itself to a trivalent form with higher mobility in the reducing environment of rice paddy soil. However, it was also shown that SRS significantly decreased the dissolution of Zn, Pb, Cd, and As in the the leachates; their removal rates in the SRS-treated soil were 66 %, 45 %, 24 %, and 84 %, respectively, of those in the control soil.


arsenic;heavy-metal;paddy;stabilization;Steel refining slag


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