| Summary: | 碩士 === 國立臺北科技大學 === 化學工程研究所 === 102 === This waste solid is dissolve by base solution, recovery of Gallium from base solution by electrowinning, and discuss its electrolysis efficiency and metal quality﹐ The electrowinning reaction are that：
H2GaO3- + H2O + 3e- → Ga(s) + 4OH-
We analysis the elemental composition by using X-ray fluorescence, Atomic absorption spectrophotometer, In this study, we have variables. Such as the different anode cathode combinations, electric current, initial concentration, current density, We observe the electrolysis efficiency, metal quality of the analysis by Atomic absorption spectrophotometer and Inductively coupled plasma optical emission spectrometry. According to the experiments, Waste solid containing Ga, Fe, Ni, Co, Zn, Cu, Cr, We selected Ti/IrO2 anode, stainless steel cathode, current 3 A, electrode distance 1 cm, current density 0.1 A/cm2, initial concentration 15000 ppm to recover metal.
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