I had prepared 50ml of 0.5M Sulphuric acid and to that I added 20ml of 0.5M sulphuric acid containing 9 drops of 2M sodium hydroxide. I then leached the mixture for 15 minutes using a magnetic stirrer. In the same standard procedure I continued to increase the pH by adding more drops of sodium hydroxide that is from 9 to 34 and 50 drops.
thank you
Dear Mpho Ramudzwagi
Hello
I think your answer is in this paper. Please find your attached file.
pl see this ref
Zinc recovery from sphalerite concentrate by direct oxidative
leaching with ammonium, sodium and potassium persulphates
M.N. Babu *, K.K. Sahu, B.D. Pandey, Hydrometallurgy 64 (2002) 119 – 129
Generally, liquor with high iron content can separated through jarosite precipitation at ph of 1.8~2 at high temperature. So with increasing ph, there will be a decrease in the recovery of nickel. However, on complete precipitation if ph increased then simply repulp the cake at a ph of 2 with high temp to maintain the recovery percentage.
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