Official Journal of the Japan Wood Research Society
Table 1 Concentrations of sodium, potassium, magnesium, and calcium ions eluted from Japanese oak charcoal (OC) and water-extracted Japanese oak charcoal (nWE-OC) after 1, 4, 8, and 12 treatments
Adsorbent | Molar concentration (mol/L) | |||
|---|---|---|---|---|
Na+ | K+ | Mg2+ | Ca2+ | |
OC | 7.0 × 10−6 | 1.6 × 10−3 | 7.7 × 10−5 | 7.8 × 10−5 |
1WE-OC | 1.3 × 10−6 | 8.4 × 10−4 | 5.3 × 10−5 | 1.8 × 10−4 |
4WE-OC | <1.3 × 10−6 | 5.9 × 10−4 | 1.7 × 10−5 | 3.6 × 10−4 |
8WE-OC | <1.3 × 10−6 | 3.9 × 10−4 | 5.8 × 10−6 | 1.7 × 10−4 |
12WE-OC | <1.3 × 10−6 | 3.5 × 10−4 | 4.5 × 10−6 | 1.0 × 10−4 |