Properties | Size Class | Electrical Conductivity (mmhos·cm−1) | Ionic Strength§ (mol·L−1) | Natural pH | CEC# (cmolc·kg−1) ± SD‡ | Ca2+ (cmolc·kg−1) | Mg2+ (cmolc·kg−1) | K+ (cmolc·kg−1) | Na+ (cmolc·kg−1) | SAR†† | OC (mg·kg−1)‡‡ | |
Colloids | Smectitic | Macro | 3.93 × 10−3 | 4.99 × 10−5 | 4.92 | 35.05 ± 12.84 | 27.60 | 6.27 | 0.57 | 0.61 | 0.15 | 658 |
Nano | 6.07 × 10−3 | 7.71 × 10−5 | 5.12 | 42.19 ± 15.12 | 32.64 | 8.00 | 0.78 | 0.77 | 0.17 | 897 | ||
Mixed | Macro | 2.91 × 10−3 | 3.70 × 10−5 | 5.07 | 8.89 ± 1.62 | 3.80 | 3.40 | 1.15 | 0.54 | 0.28 | 645 | |
Nano | 3.09 × 10−2 | 3.92 × 10−4 | 4.92 | 10.51 ± 1.67 | 4.00 | 3.47 | 2.80 | 0.24 | 0.12 | 774 | ||
Kaolinitic | Macro | 2.87 × 10−3 | 3.64 × 10−5 | 4.91 | 6.94 ± 1.85 | 4.40 | 1.60 | 0.45 | 0.49 | 0.28 | 430 | |
Nano | 3.80 × 10−3 | 4.83 × 10−5 | 5.38 | 13.12 ± 2.84 | 7.12 | 3.73 | 1.23 | 1.04 | 0.45 | 647 | ||
Biosolid | Macro | 1.56 × 10−2 | 1.97 × 10−4 | 5.39 | 37.61 ± 14.85 | 31.60 | 3.60 | 1.64 | 0.77 | 0.18 | 1.3K | |
Nano | 4.69 × 10−2 | 5.96 × 10−4 | 5.25 | 70.99 ± 22.98 | 51.68 | 12.13 | 3.98 | 3.20 | 0.57 | 16K |