[H2SO4]/(g∙L−1) | Cu | Fe | As | Zn | Pb | Bi | Si |
25 | 15.59 | 29.06 | 4.34 | 2.66 | 2.64 | 1.80 | 7.92 |
50 | 15.83 | 29.63 | 3.39 | 2.74 | 2.65 | 1.16 | 7.99 |
75 | 15.60 | 29.86 | 2.94 | 2.79 | 2.92 | 1.15 | 8.38 |
100 | 15.04 | 30.51 | 2.12 | 2.86 | 3.12 | 0.973 | 8.76 |