Abstract: The effects of desorption solution composition,replacement rate and single cycle time on the desorption rate and desorption ratio of gold-bearing activated carbon (abbreviated to Au-bearing AC) were studied through laboratory desorption tests.The results showed that single cycle time was the significant factor for desorption of Au-bearing AC,the desorption rate and desorption ratio could improved dramatically by shorten the single cycle time;Addition of small amount of NaCN could increase the desorption ratio of Au-bearing AC at lower single cycle time,however,the effect of replacement rate was least significant for Au-bearing AC desorption.

Key words: Gold-bearing activated carbon, Desorption, Cycle time, Kinetics