• To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Leaching.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

gold adsorption onto carbon (3 replies)

Nyasha Jawanda
2 weeks ago
Nyasha Jawanda 2 weeks ago

hi guys what are factors that affect gold adsorption onto carbon in carbon in solution process.

2 weeks ago
mpnyanhongo 2 weeks ago

pH, Cyanide strength, Agitation, density and obviously Carbon activity

Nyasha Jawanda
2 weeks ago
Nyasha Jawanda 2 weeks ago

hie....how do the following affect Au adsorption

Au concentration

solution pH

CN concentration 

ionic strength

carbon particle size


Sugar Watkins
2 weeks ago
Sugar Watkins 2 weeks ago

Activated carbon is used to recover gold from cyanide leach solutions, owing to its large surface area. There are 3 major mechanisms controlling the rate of gold adsorption onto activated carbon:

1) film diffusion: mass transport of gold cyanide from the bulk solution phase through a hypothetical hydrodynamic boundary layer or film surrounding the carbon particle;

2) pore diffusion: mass transport of the dissolved species in the solution filling the pores; and

3) surface diffusion: migration of the adsorbed molecules along the internal pore walls.

It is generally believed that the initial rate of gold adsorption is controlled by film diffusion, whilst pore or surface diffusion or both in parallel become the dominant mechanism at high gold loadings.

READ--> Mechanism of gold adsorption

Please join and login to participate and leave a comment.