Metal Recovery / Precious Metal Recovery

Precious Metal Recovery from Dilute solutions

Ion exchange processes have found a valuable place in the treatment of metal wastes from plating, metal working and other industrial processes where there is a discharge of toxic metals, also ion exchange is a convenient way to concentrate and achieve Precious Metal Recovery.

Ion exchange is usually employed with two columns, one acting as a worker and the second as a polisher, this configuration allows for full loading on the worker column without compromising leakage to final discharge.

Ion exchange columns are regenerated when exhausted with acid (sulphuric, hydrochloric, etc.)

The amounts will depend on the composition of the feed water and cycle control will be based on toxic regulations and treated water quality. The spent regenerants can be sent for electro-winning, evaporation concentration, batch treatment that yields a dry cake solid of pure metal hydroxide for off site disposal.

Precious Metal Recovery - Palladium

Precious Metal Recovery - Application Information

Silver Recovery / Gold Recovery concentrates - Electrowinning.

Silver Recovery / Gold Recovery dilute (cyanide) - Ion Exchange weak base.

Palladium - Dilute - Selective weak acid cation

Rodium - Dilute - Strong base anion

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This page was last reviewed 27/01/09