Table 2 Calculated activities of Cd2+, H2PO4−, and CO32−, as well as the ionic strength and pH of soil solutions amended with different rates of K2HPO4 after eight weeks of incubation
From: Mechanism of cadmium immobilization in phosphate-amended arable soils
K2HPO4addition (mg P kg−1) | pH | Ionic strength (M) | log activity (mol L-1) | ||
|---|---|---|---|---|---|
Cd2+ | H2PO4− | CO32− | |||
0 | 5.20 | 0.019 | − 5.614 | − 5.571 | − 9.426 |
400 | 5.97 | 0.066 | − 7.202 | − 3.165 | − 7.679 |
800 | 6.42 | 0.097 | − 7.469 | − 2.570 | − 6.828 |
1600 | 7.03 | 0.117 | − 7.878 | − 1.787 | − 5.799 |
3200 | 7.46 | 0.286 | − 7.795 | − 1.992 | − 4.841 |
8,000 | 8.29 | 0.772 | − 7.438 | − 2.543 | − 3.624 |
16,000 | 8.94 | 1.543 | − 7.128 | − 2.955 | − 2.097 |