Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5756659 | Waste Management | 2017 | 13 Pages |
Abstract
The overall aim of this study is to separate and recover zinc and cadmium from spent batteries. For this purpose Cyphos IL 102 diluted in toluene was employed for the extraction and recovery of Zn and Cd from Zn-C and Ni-Cd batteries leach liquor. The influence of extractant concentration for the leach liquors of Zn-C (0.01-0.05Â mol/L) and Ni-Cd (0.04-0.20Â mol/L) batteries has been investigated. Composition of the leach liquor obtained from Zn-C/Ni-Cd spent batteries is Zn - 2.18Â g/L, Mn - 4.59Â g/L, Fe - 4.0Â ÃÂ 10â3Â g/L, Ni - 0.2Â ÃÂ 10â3Â g/L/Cd - 4.28Â g/L, Ni - 0.896Â ÃÂ 10â1Â g/L, Fe - 0.148Â g/L, Co - 3.77Â ÃÂ 10â3Â g/L, respectively. Two stage counter current extraction at A/O 1:1 and 3:2 with 0.04Â mol/L and 0.2Â mol/L Cyphos IL 102 for Zn and Cd, respectively provide more than 99.0% extraction of both the metal ions with almost negligible extraction of associated metal ions. A stripping efficiency of around 99.0% for Zn and Cd was obtained at O/A 1:1 using 1.0Â mol/L HNO3 in two and three counter current stages, respectively. ZnO and CdO were also synthesized using the loaded organic phase and characterized using XRD, FE-SEM and EDX techniques. XRD peaks of ZnO and CdO correspond to zincite and monteponite, respectively. The average particle size was â¼27.0Â nm and â¼37.0Â nm for ZnO and CdO, respectively. The EDX analysis of ZnO and CdO shows almost 1:1 atomic percentage.
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Authors
Rashmi Singh, Harshit Mahandra, Bina Gupta,