Sample number | Na2S (gr/L) | H2SO4 (N) | Pb (ppm) | Cu (ppm) | Zn (ppm) | Fe (ppm) | Time (min) | pH |
0 | 0 | 0 | 3.75 | 6569 | 8770 | 4277 | 0 | 12 |
1 | 5 | 0.006 | 3.32 | 1843 | 1602 | 1452 | 15 | 10 |
2 | 5 | 0.008 | 1.88 | 2104 | 1770 | 1610 | 15 | 9 |
3 | 5 | 0.01 | 1.37 | 1113 | 1569 | 1050 | 15 | 8 |
4 | 5 | 0.012 | 1.17 | 1093 | 1419 | 699 | 15 | 7 |
5 | 10 | 0.014 | 1.01 | 680 | 352 | 403 | 15 | 6 |
6 | 10 | 0.016 | 0.91 | 405 | 167 | 267 | 15 | 5 |
7 | 10 | 0.018 | 0.80 | 168 | 49 | 50 | 15 | 4 |
8 | 10 | 0.02 | 0.5 | 59 | 40 | 10 | 15 | 3 |