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Cadmium Recovery <br />Cadmium arrives at the Facility as cadmium cyanide complexes <br />splexes <br />concentrated on ion exchange resins <br />an The resin is <br />of <br />wastewater containing cnsadaranddwatercadmium. <br />then treated to oxidize <br />regenerated with causticshipments of <br />the cyanide. The regenerant solution andthe <br />cell andthe <br />wastewater are transferred trecovered.o a small plWastewater not <br />cadmium is electrolytically <br />containing cadmium is neutralized, filtered and discharged. <br />Chrome Recovery <br />shipments of chrome in the hexavalent form are <br />et formed <br />Bulk P <br />with sodium bisulfate for doonthe <br />ion exchange resins. <br />Trivalent chrome is also concentrated roduced by flushing with <br />The resin regenerant solution (p <br />caustic soda and water) and the reduced bulk s ipdenissolutions <br />are treated by precipitation. The chrome by r <br />de <br />watered and resold. Any waste waters from hen treatment <br />processes that do not contain chrome are neutralized <br />filtered before discharge to the sewer. <br />Z inc _Recover <br />cyanide complexes in bulx shipments of waste water and <br />c <br />Zinc y <br />concentrated on ion exchange resins are treetZdncoisxthene the <br />cyanide after the resin is regenerated. T ted disposed. <br />prep ca itated as zinc hydroxide, fixaend processes that does <br />Wastewater generated during these treatm <br />not <br />contain zinc is neutralized and filtered before discharge. <br />Nickel Recover <br />Nickel en <br />ters the Facility as nickel in acidic wastewater and <br />concentrated on ion exchange resin. Tha�tbulk shipmentsOf <br />d carbon co].umn <br />electroless nickel are run througahan ents present. The ion <br />to remove the organic chelating g sulfuric acid, sodium <br />exchange resins are pThenregenerantnsolutions and bulk nickel <br />chloride and water. precipitating the <br />shipments of both types are treated by <br />as <br />nickel hydroxide, dewatered, and resold <br />ea�efl�slsnp�ndary <br />metals market. Wastewaters from these r <br />in nickel, are neutralized, filtered and dishcharged. <br />contain g <br />Lead Recover <br />Bulk shipments of wastewater containalead and a lead treatment are the <br />hydroxide sludge generated during <br />two forms of lead arriving <br />at the Facility. The lead is <br />from the wastewater as lead l�Ydr�i�ationBoth <br />and <br />precipitated <br />sludg <br />es are dewatered and sold v posse generated during <br />disposal is the other alteinang lead, iseneutrawater ized and <br />these processes, not conta g <br />filtered before discharge. <br />A-9 <br />