Research Article
Extraction of Zinc and Manganese from Alkaline and Zinc-Carbon Spent Batteries by Citric-Sulphuric Acid Solution
Table 3
List of tests of the second leaching campaign.
| Test No. | H2SO4 (M) | Citric acid (M) | Pulp density (%) | T (C) |
| 1 | 1 | 0.075 | 15 | 40 | 2 | 2 | 0.075 | 15 | 40 | 3 | 1 | 0.225 | 15 | 40 | 4 | 2 | 0.225 | 15 | 40 | 5 | 1 | 0.075 | 25 | 40 | 6 | 2 | 0.075 | 25 | 40 | 7 | 1 | 0.225 | 25 | 40 | 8 | 2 | 0.225 | 25 | 40 | 9 | 1 | 0.075 | 15 | 60 | 10 | 2 | 0.075 | 15 | 60 | 11 | 1 | 0.225 | 15 | 60 | 12 | 2 | 0.225 | 15 | 60 | 13 | 1 | 0.075 | 25 | 60 | 14 | 2 | 0.075 | 25 | 60 | 15 | 1 | 0.225 | 25 | 60 | 16 | 2 | 0.225 | 25 | 60 |
| 17 | 0.5 | 0.150 | 20 | 50 | 18 | 2.5 | 0.150 | 20 | 50 | 19 | 1.5 | 0.000 | 20 | 50 | 20 | 1.5 | 0.300 | 20 | 50 | 21 | 1.5 | 0.150 | 10 | 50 | 22 | 1.5 | 0.150 | 30 | 50 | 23 | 1.5 | 0.150 | 20 | 30 | 24 | 1.5 | 0.150 | 20 | 70 |
| 25 | 1.5 | 0.150 | 20 | 50 | 26 | 1.5 | 0.150 | 20 | 50 | 27 | 1.5 | 0.150 | 20 | 50 | 28 | 1.5 | 0.150 | 20 | 50 |
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