Table 5 Results of Cs+ removal in soil-treated wastewater (B) under various conditions of reagents, coagulant and a filter, showing the effect of DND for rapid soil precipitation.
run # | DND | CuCl2 | KFCa | coagulant | precipitation time | filter | Cs activity (Bq/L) | |
|---|---|---|---|---|---|---|---|---|
(mg/L) | (mM) | (mM) | (mg/L) | (min) | (1 μm) | Cs 134 | Cs 137 | |
1 | 0.0 | 0.0 | 0.0 | 0.0 | >720 | − | 116 | 84.6 |
2 | 0.0 | 0.0 | 0.0 | 0.0 | >720 | + | N.D.b | N.D. |
3 | 0.0 | 0.0 | 0.0 | 2.5 | >720 | − | ─c | ─ |
4 | 2.5 | 0.0 | 0.0 | 0.0 | >720 | − | ─ | ─ |
5 | 2.5 | 0.0 | 0.0 | 2.5 | >720 | − | ─ | ─ |
6 | 2.5 | 0.5 | 0.25 | 2.5 | 30 | − | 7.1 | 5.5 |
7 | 2.5 | 0.5 | 0.25 | 2.5 | 30 | + | N.D. | N.D. |
8 | 0.0 | 0.5 | 0.25 | 0.0 | 30 | + | N.D. | N.D. |
9. | 2.5 | 0.5 | 0.25 | 0.0 | 5 | + | N.D. | N.D. |
10 | 0.0 | 0.5 | 0.25 | 2.5 | 10 | + | N.D. | N.D. |
