Business and Economics

STUDY ON RECOVERABLE GOLD FROM THE EFFLUENTS RELEASED BY GOLD ANALYSIS LABORATORIES

In the present study, an attempt has been made to estimate the recoverable gold from waste aqua-regia solution containing gold traces released by gold processing laboratories in Tanzania.  One kilogram sample of aqua-regia solution containing 69 ppm of gold was treated with zinc dust, sodium cyanide and   sodium hydroxide in stoichiometric quantities. The mass of zinc was optimized keeping the other parameters constant.  The resultant solution containing elemental gold in the form of a precipitate was separated by filtration.  The amount of unrecovered gold traces present in the filtrate has been assayed by AAS.  Basing on the calculations, the   recoverable gold was found to be 74.78%, at an optimum mass of zinc.  The results obtained were analyzed and reported.

 

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