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portable silver gold leaching unitsmobile silver gold leaching units

Sep 01, 2020· Recovery ofgoldfrom PCBs is often reported using cyanideleaching[], non-cyanide lixiviants such as thiosulphate, thiourea [], and aqua regia [].Precipitation (0.3 M thiosulfate and ammonia, 0.01 copper sulfate), solvent extraction (Cyanex 272 or LIX 63), ion exchange resin and emulsion liquid membrane (CTAB/n-heptane/ isoamyl alcohol/Na 2 SO 3 micro-emulsion) electrowinning (23.8 Am −2

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