Table 6 Lead speciation, as a function of pH and log 
along the 0.001 ppm Pb isopleth of the model composite ore-brine at 100°Cab
along the 0.001 ppm Pb isopleth of the model composite ore-brine at 100°CabpH | log | Iron phasecsaturation | Cation | Chloride complexes | Sulfide complexes | Hydroxide complexes | Acetate complexes | Malonate complexes | Data set |
|---|---|---|---|---|---|---|---|---|---|
8.00 | -52.70 | Hm | 0.06 | 23.60 | 2.3 × 10-4 | 73.47 | 0.80 | 2.6 × 10-3 | 7 |
6.00 | -52.40 | Py | 0.22 | 93.09 | 0.57 | 2.89 | 3.04 | 0.01 | 6 |
6.00 | -53.55 | Py | 1.1 × 10-3 | 0.48 | 99.49 | 0.02 | 0.02 | 5.2 × 10-5 | 5 |
6.45 | -54.00 | Py | 1.6 × 10-4 | 0.07 | 99.92 | 5.8 × 10-3 | 2.3 × 10-3 | 7.5 × 10-6 | 4 |
7.00 | -54.60 | Py | 1.3 × 10-5 | 5.4 × 10-3 | 99.99 | 1.7 × 10-3 | 1.9 × 10-4 | 6.1 × 10-7 | 3 |
7.30 | -55.00 | Py | 3.2 × 10-6 | 1.3 × 10-3 | 99.99 | 8.3 × 10-4 | 4.7 × 10-5 | 1.5 × 10-7 | 2 |
7.55 | -57.00 | Py | 9.4 × 10-7 | 3.9 × 10-4 | 99.99 | 4.3 × 10-4 | 1.3 × 10-5 | 4.3 × 10-8 | 1 |