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- W245816133 abstract "The U.S. Bureau of Mines (USBM) is investigating hydrometallurgical processing techniques to recycle metals from semiconductors and other advanced materials. Cadmium amd tellurium were recovered from mixed CdTe/CdS scrap produced in the manufacture of thin-film photovoltaic devices. Leaching the scrap for 90 min at 110 deg. C in 2.2Normal H2SO4 under 400 psig O2 yielded 97% Cd extraction; however, cadmium content of the residue ranged between 4% and 7%. Soluble iron was added to the lixiviant to catalyze oxidation of the CdS component. Tellurium and sulfur remained in the leach residue primarily in the elemental form. The iron and tellurium were removed from the cadmium-rich leach liquor by adjusting the pH to 5.3. The cadmium was recovered as cadmium sulfate crystals by evaporating the solution. Alternative leaching and purification schemes are discussed." @default.
- W245816133 created "2016-06-24" @default.
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- W245816133 date "1995-12-31" @default.
- W245816133 modified "2023-09-26" @default.
- W245816133 title "Recovering cadmium and tellurium from thin-film photovoltaic device scrap. Report of investigations/1995" @default.
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