Arsenic removal from copper electrolytic baths

Arsenic removal from copper electrolytic baths... 

As(V) removal from simulated copper electrolytic baths via SLM. Cyanex 921 94% As recovery in 120 minutes 100% selectivity to Arsenic with respect to Biflll) and Sb(III) Martinez Perez et al. (2007)... 

Crude lead contains traces of a number of metals. The desilvering of lead is considered later under silver (Chapter 14). Other metallic impurities are removed by remelting under controlled conditions when arsenic and antimony form a scum of lead(II) arsenate and antimonate on the surface while copper forms an infusible alloy which also takes up any sulphur, and also appears on the surface. The removal of bismuth, a valuable by-product, from lead is accomplished by making the crude lead the anode in an electrolytic bath consisting of a solution of lead in fluorosilicic acid. Gelatin is added so that a smooth coherent deposit of lead is obtained on the pure lead cathode when the current is passed. The impurities here (i.e. all other metals) form a sludge in the electrolytic bath and are not deposited on the cathode. 

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