Fig. 1. As concentration in soil by aqua-regia digestion and sequential extraction. (a) Ham-Tae mine, (b) Dong-Won mine,(c) Dong-Hae mine, (d) Ok-Dong mine.
Fig. 3. Arsenic concentrations in leachate from soil column (a) Dong-Won mine, (b) Dong-Hae mine.
Fig. 4. Variation of (a) As, (b) pH, and (c) EC in leachate from As stabilization in soil column.
Fig. 2. (a) Acid mine drainage sludge (AMDS) pellet and (b) As removal ratio by AMDS pellet, limestone and steel slag.
Table 1. Sequential extraction process for As in soil
Table 2. Evaluation method for arsenic stabilization efficiency in soil