Fig. 1. Efficiency of Cd cementation with time and initial pH in 0.1 M CdSO4 solution at 25℃ using Zn granulars (Zn particle size = 700 um, Zn/Cd ratio = 2.6).
Fig. 2. Efficiency of Cd cementation with time and initial pH in 0.1 M CdSO4 solution at 60℃ using Zn granulars (Zn particle size = 700 um, Zn/Cd ratio = 2.6).
Fig. 3. Efficiency of Cd cementation with time and initial pH in 0.1 M CdSO4 solution at 60℃ using Zn powders (Zn particle size = 150 um, Zn/Cd ratio = 2.6).
Fig. 4. Efficiency of Cd cementation with Zn to Cd ratio in 0.1 M CdSO4 solution at 60℃ using Zn powders (Zn particle size = 150 um, Initial pH = 5.0).
Fig. 5. Efficiency of Cd and Ni with Zn to Cd ratio in Ni-Cd leaching solution I (Initial pH = 4.0) at 60℃ using Zn granulars (700 um) after 120 min.
Fig. 6. Efficiency of Cd and Ni with temperatures in Ni-Cd leaching solution II (Initial pH = 0.1) using Zn granulars (700 um) after 60 min (Zn/Cd ratio = 2.6).
Fig. 7. Efficiency of Cd and Ni with temperatures in Ni-Cd leaching solution II (Initial pH = 5.0) using Zn granulars (150 um) after 30 min (Zn/Cd ratio = 2.6).
Table 1. Chemical composition of leach solutions of Ni-Cd battery electrode materials (g/L)
Table 2. Design of experiment for Cd cementation
Table 3. Results of Cd cementation efficiencies in 0.1 M CdSO4 solution using Zn particles
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