XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 1169
• speciation modeling before ion transport modeling
improves the rejection rates obtained
• solutions for which the Donnan effect needs to be
considered benefit more from speciation: this not
only provides information on the size of all the
molecules present in solution, but also on their
valence, data that are essential to account for this
phenomenon.
Considering the kinetic of the reaction taking place inside
the membrane could allow to model the evolution of the
solution speciation at every step of the separation.
REFERENCES
Bani, A., Echevarria, G., Sulçe, S., and Morel, J.L.,
2015. Improving the Agronomy of Alyssum murale
for Extensive Phytomining: A Five-Year Field Study.
International Journal of Phytoremediation 17:117–127.
Brönsted, J.N., 1922. Studies on solubility. IV The prin-
ciple of the specific interaction of ions. Journal of the
American Chemical Society 44:877–898.
Dickson, O.V., Deleau, T., Coquelet, C., Espitalier,
F., Lombart, J., Tardy, A., and Lachaize, F., 2023.
Speciation and reaction equilibrium constant model-
ling of aqueous hydrometallurgical systems at elevated
temperatures: A review. Chemical Thermodynamics and
Thermal Analysis 11:100–117.
european commission.2023. Législation sur les matières
premières critiques—Consilium www.consilium
.europa.eu/fr/infographics/critical-raw-materials/.
Fridman-Bishop, N., and Freger, V., 2017. What makes
aromatic polyamide membranes superior: New insights
into ion transport and membrane structure. Journal of
Membrane Science 540:120–128.
Houzelot, V., Laubie, B., Pontvianne, S., and Simonnot,
M.-O., 2017. Effect of up-scaling on the quality
of ashes obtained from hyperaccumulator biomass
to recover Ni by agromining. Chemical Engineering
Research and Design 120:26–33.
López, J., Yaroshchuk, A., Reig, M., Gilbert, O., and
Cortina, J., 2021. An engineering model for solute
transport in semi-aromatic polymeric nanofiltration
membranes: Extension of solution-electro-diffusion
model to complex mixtures. Journal of Environmental
Chemical Engineering 9:105262.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 1 2 3 4 5 6 7 8 9 10
Jv (10–6m/s)
simulated value with speciation for nickel simulated value with speciation for magnesium
simulated value with speciation for iron simulated value without speciation for nickel
simulated value without speciation for magnesium simulated value without speciation for iron
experimental value for nickel experimental value for magnesium
experimental value for iron
Figure 3. Comparison of the simulated rejection rate with and without taking speciation into account for a solution with an
ionic strength of 0.36 mol/kg
Rejection
Rate
• speciation modeling before ion transport modeling
improves the rejection rates obtained
• solutions for which the Donnan effect needs to be
considered benefit more from speciation: this not
only provides information on the size of all the
molecules present in solution, but also on their
valence, data that are essential to account for this
phenomenon.
Considering the kinetic of the reaction taking place inside
the membrane could allow to model the evolution of the
solution speciation at every step of the separation.
REFERENCES
Bani, A., Echevarria, G., Sulçe, S., and Morel, J.L.,
2015. Improving the Agronomy of Alyssum murale
for Extensive Phytomining: A Five-Year Field Study.
International Journal of Phytoremediation 17:117–127.
Brönsted, J.N., 1922. Studies on solubility. IV The prin-
ciple of the specific interaction of ions. Journal of the
American Chemical Society 44:877–898.
Dickson, O.V., Deleau, T., Coquelet, C., Espitalier,
F., Lombart, J., Tardy, A., and Lachaize, F., 2023.
Speciation and reaction equilibrium constant model-
ling of aqueous hydrometallurgical systems at elevated
temperatures: A review. Chemical Thermodynamics and
Thermal Analysis 11:100–117.
european commission.2023. Législation sur les matières
premières critiques—Consilium www.consilium
.europa.eu/fr/infographics/critical-raw-materials/.
Fridman-Bishop, N., and Freger, V., 2017. What makes
aromatic polyamide membranes superior: New insights
into ion transport and membrane structure. Journal of
Membrane Science 540:120–128.
Houzelot, V., Laubie, B., Pontvianne, S., and Simonnot,
M.-O., 2017. Effect of up-scaling on the quality
of ashes obtained from hyperaccumulator biomass
to recover Ni by agromining. Chemical Engineering
Research and Design 120:26–33.
López, J., Yaroshchuk, A., Reig, M., Gilbert, O., and
Cortina, J., 2021. An engineering model for solute
transport in semi-aromatic polymeric nanofiltration
membranes: Extension of solution-electro-diffusion
model to complex mixtures. Journal of Environmental
Chemical Engineering 9:105262.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 1 2 3 4 5 6 7 8 9 10
Jv (10–6m/s)
simulated value with speciation for nickel simulated value with speciation for magnesium
simulated value with speciation for iron simulated value without speciation for nickel
simulated value without speciation for magnesium simulated value without speciation for iron
experimental value for nickel experimental value for magnesium
experimental value for iron
Figure 3. Comparison of the simulated rejection rate with and without taking speciation into account for a solution with an
ionic strength of 0.36 mol/kg
Rejection
Rate