Effectiveness of Steel Slag Solidification on Multiple Metal Ions in Acid-Contaminated Soil
(Room 401)
07 May 19
10:30 AM
-
11:00 AM
Steel slag is the byproduct of BOF steelmaking, composed mainly of calcium, silicon, iron, aluminum and manganese oxides. These substances are in the presence of silicate, ferrate and alkaline oxides which release OH- during hydrolysis. Silicates make slag having gel-like properties. Therefore, slag has acid neutralization and precipitation abilities and has the potential to solidify metal ions in acid-contaminated soil. After slag is added to contaminated soil, the conversion of metal ions is from unstable to more stable fraction. The solidification mechanism of metal ions by slag may be precipitation, ion exchange and synergistic reaction with organic matter.