3112 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
the ligands bonded to the copper surface through the sulfur
atom, rather than nitrogen, oxygen, or the allylic group in
AIBTC.
Moreover, the higher the ligand concentration, the
lower the OCP value, suggesting an increased reducing
environment and possibly a stronger coordination between
copper and sulfur. A comparison of the impact of AIBTC
and IPETC on OCP indicates only a minimal difference
across varying concentrations ranging from 10–6 to 10–3
M. The ratios of the difference in OCP between the two
ligands at each concentration to the OCP values for each
ligand are presented in Table 1. The rate of OCP decrease
versus the increasing concentration of two ligands exhib-
ited only a few minor variations.
Figure 5. Pourbaix diagram for copper in aqueous solutions
(Celante &Freitas, 2009)
Figure 6. Open Circuit Potential vs. Concentration for AIBTC and IPETC
Table 1. Open Circuit Potential vs. Concentration for AIBTC and IPETC
Concentration,
M
OCP, V ΔOCP,
V
ΔOCP/OCP, %
AIBTC IPETC AIBTC IPETC
0 –0.038 –0.038 0 0 0
1E–06 –0.040 –0.043 0.003 7.50 6.98
1E–05 –0.048 –0.045 –0.003 6.25 6.67
1E–04 –0.068 –0.068 0 0 0
1E–03 –0.123 –0.116 –0.007 5.69 6.03
the ligands bonded to the copper surface through the sulfur
atom, rather than nitrogen, oxygen, or the allylic group in
AIBTC.
Moreover, the higher the ligand concentration, the
lower the OCP value, suggesting an increased reducing
environment and possibly a stronger coordination between
copper and sulfur. A comparison of the impact of AIBTC
and IPETC on OCP indicates only a minimal difference
across varying concentrations ranging from 10–6 to 10–3
M. The ratios of the difference in OCP between the two
ligands at each concentration to the OCP values for each
ligand are presented in Table 1. The rate of OCP decrease
versus the increasing concentration of two ligands exhib-
ited only a few minor variations.
Figure 5. Pourbaix diagram for copper in aqueous solutions
(Celante &Freitas, 2009)
Figure 6. Open Circuit Potential vs. Concentration for AIBTC and IPETC
Table 1. Open Circuit Potential vs. Concentration for AIBTC and IPETC
Concentration,
M
OCP, V ΔOCP,
V
ΔOCP/OCP, %
AIBTC IPETC AIBTC IPETC
0 –0.038 –0.038 0 0 0
1E–06 –0.040 –0.043 0.003 7.50 6.98
1E–05 –0.048 –0.045 –0.003 6.25 6.67
1E–04 –0.068 –0.068 0 0 0
1E–03 –0.123 –0.116 –0.007 5.69 6.03