Research Article
Extraction of Zinc and Manganese from Alkaline and Zinc-Carbon Spent Batteries by Citric-Sulphuric Acid Solution
Table 1
Experimental conditions of 24 full factorial design.
| N. | Treat. | A Sulphuric acid | B Citric acid | C Temp. | D Pulp density | A (M) | B (g ) | C (C) | D (g ) |
| 1 | (1) | | | | | 0.9 | 7 | 40 | 100 | 2 | a | | | | | 1.4 | 7 | 40 | 100 | 3 | b | | | | | 0.9 | 20 | 40 | 100 | 4 | ab | | | | | 1.4 | 20 | 40 | 100 | 5 | c | | | | | 0.9 | 7 | 80 | 100 | 6 | ac | | | | | 1.4 | 7 | 80 | 100 | 7 | bc | | | | | 0.9 | 20 | 80 | 100 | 8 | abc | | | | | 1.4 | 20 | 80 | 100 | 9 | d | | | | | 1.8 | 14 | 40 | 200 | 10 | ad | | | | | 2.7 | 14 | 40 | 200 | 11 | bd | | | | | 1.8 | 40 | 40 | 200 | 12 | abd | | | | | 2.7 | 40 | 40 | 200 | 13 | cd | | | | | 1.8 | 14 | 80 | 200 | 14 | acd | | | | | 2.7 | 14 | 80 | 200 | 15 | bcd | | | | | 1.8 | 40 | 80 | 200 | 16 | abcd | | | | | 2.7 | 40 | 80 | 200 |
| 17 | 0 | 0 | 0 | 0 | 0 | 1.7 | 20 | 60 | 150 | 18 | 0 | 0 | 0 | 0 | 0 | 1.7 | 20 | 60 | 150 |
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