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

Table 7

Second series of leaching experiments: concentrations and extraction yields.

Test	Zn concentration (g L^−1)	Zn extraction; yield (%)	Mn concentration (g L^−1)	Mn extraction; yield (%)
1	35.0	79.1	23.4	41.1
2	42.3	95.6	39.1	68.6
3	36.1	81.5	20.6	36.2
4	39.9	90.2	46.9	82.3
5	38.1	51.6	25.9	27.2
6	50.3	68.2	47.1	49.5
7	32.5	44.1	32.2	33.9
8	43.5	59.0	43.4	45.7
9	28.9	65.3	26.0	45.6
10	41.7	94.2	42.0	73.6
11	30.2	68.3	28.9	50.7
12	38.2	86.4	43.4	76.1
13	42.1	57.1	20.4	21.5
14	55.4	75.2	45.2	47.6
15	42.7	57.8	25.5	26.8
16	55.8	75.6	54.1	56.9
17	27.2	46.1	10.5	13.8
18	49.2	83.4	53.7	70.6
19	52.9	89.7	15.3	20.2
20	33.6	57.1	38.8	51.1
21	26.8	90.9	30.9	81.3
22	42.8	48.3	32.7	28.7
23	37.0	62.7	32.7	43.0
24	43.7	74.1	36.3	47.8
25	37.0	62.8	32.6	42.9
26	39.6	67.1	33.2	43.7
27	40.7	69.0	38.8	51.1
28	39.8	67.5	33.3	43.8