ammonium persulfate in gold recovery

  • Solution for precipitating gold from HAuCl4 solution - Finishing

    We let the solution stand overnight to settle down & recover gold from it by washing ... Sodium Metabisulfite, Ferrous Sulphate, S02,Copper, can precipitate gold. ... Please be careful: despite smelling like ammonia, it is carcinogenic and toxic to...

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  • Recovery of gold from waste electrical and ... - Science Direct

    Highlights. •. A methodology to recover gold from WEEE using ammonium persulfate is proposed. •. Au recovery is investigated implementing response surface...

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  • Selective leaching reagent for the recovery of copper from PCB

    leaching agent of ammonia-ammonium persulfate, to recover copper. ... Leaching is one of the processes for the recovery of metals from PCB. .... surfactant-fundamental studies and application to gold recovery from printed substrate, Sep. Sci.

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  • Leaching of Gold from the Waste Mobile Phone Printed Circuit Boards

    Jan 2, 2012 ... work deals with the recovery of gold using ammonium thiosulfate as a leaching ... viz. ammonium thiosulfate concentration, copper sulfate...

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  • Gold Cementation from Ammonium Thiosulfate Solution by Zinc ...

    composition for the gold cementation from the ammonium thiosulfate solution was founded to be ..... sulfate concentrations and pH on the gold recovery were in-.

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  • Gold Recovery from Electronic Waste by Pressure Oxidation

    Aug 23, 2016 ... conditions for gold recovery were established in 0.66 M, 103 kPa and ... Keywords: Gold recovery, Pressure oxidation, Ammonium persulfate,...

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  • Recovery of gold from waste electrical and electronic ... - Europe PMC

    This paper presents a novel methodology to recover gold from waste electrical and electronic equipment (WEEE) using ammonium persulfate ((NH4)2S2O8).

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  • Patent US5114687 - Ammonia extraction of gold and silver from ...

    May 19, 1992 ... Ammonia extraction of gold and silver from ores and other materials ... of ammonium sulfate, ammonium chloride, ammonium nitrate, and...

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  • Thiosulfate leaching of gold from waste mobile phones. - NCBI

    Jan 25, 2010 ... Gold extraction was found to be enhanced with solutions containing 15-20 mM cupric, 0.1-0.14 M thiosulfate, and 0.2-0.3 M ammonia. Similar...

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  • Leaching of Gold - Tripod

    Leaching of Gold with Various Lixiviants or Complexing Agents. ... to selectively dissolve gold from the gangue material and for simple recovery of .... Thiosulfate ion, S2O32-, has a structure similar to sulfate with one oxygen replaced by a sulfur atom. ... Examination the Eh-pH diagram of the gold-ammonia-thiosulfate-water...

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