Decomposition Kinetics of Argentian Lead Jarosite in NaOH Media
DOI:
https://doi.org/10.29356/jmcs.v55i4.801Keywords:
Kinetics, decomposition, argentian, lead, jarosite, cyanidation, alkalineAbstract
Argentian lead jarosite was obtained with the maximal dissolution technique, and it was thoroughly characterized. In this work we studied the decomposition kinetics and cyanidation of the argentian lead jarosite in NaOH media. The reaction order and activation energy for the alkaline decomposition are of n = 0.7 and Ea = 101.85 KJmol-1, and of n = 0 and Ea = 109.54 KJmol-1 for the cyanidation process.
The global cyanidation process consists of two stages: decomposition reaction followed by the instant cyanidation of the decomposition products.
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Figure 11. Dependence of kexp vs. NaCN concentration. Reaction order n = 0.
Figure 12. Dependence of kexp vs. temperature. Ea = 109.54 KJmol-1. Decomposition Kinetics of Argentian Lead Jarosite in NaOH Media 213
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