Extraction of Zinc and Manganese from Alkaline and Zinc-Carbon Spent Batteries by Citric-Sulphuric Acid Solution

<table>Effect of most significant factors and of their interactions on Mn and Zn extraction yield at 5 h (A: sulphuric acid concentration; B: citric acid concentration; C: temperature; D: pulp density).</table>

International Journal of Chemical Engineering

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Figure 4

Figure 4: Extraction of Zinc and Manganese from Alkaline and Zinc-Carbon Spent Batteries by Citric-Sulphuric Acid Solution 