Kinetics of Mn(II) transport from aqueous sulfate solution through a supported liquid membrane containing Di(2-ethylhexyl) phosphoric acid in kerosene
- Regional Research Laboratory, Orissa, (India)
The permeation rate of Mn(II) from its aqueous sulfate solution through a solid supported liquid membrane containing di(2-ethylhexyl) phosphoric acid (D2EHPA) in kerosene as the mobile carrier has been studied as a function of hydrodynamic conditions. Concentrations of Mn[sup 2+] (0.91-16.38 mol/m[sup 3]) and H[sup +] (pH 2.0-5.0) in the feed solution, carrier concentration (10-800 mol/m[sup 3]) in the membrane, and temperature. It is observed that as the Mn(II) flux approaches a plateau region, the rate of permeation is predominantly controlled by diffusion through the membrane. On the other hand, at low Mn(II) and high H[sup +] ion concentrations, the high diffusivity of the Mn-D2EHPA complex causes the overall permeation rate to be controlled by the interfacial reaction. It is also observed that the rate of Mn(II) permeation is first order with respect to dimer concentration up to 40 mol/m[sup 3] and half order above this concentration. Kinetic equations derived on the basis of the proposed mechanism are found to fit the experimental data satisfactorily.
- OSTI ID:
- 6907885
- Journal Information:
- Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 27:13; ISSN 0149-6395; ISSN SSTEDS
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320302* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Materials
AQUEOUS SOLUTIONS
DATA
DIFFUSION
DISPERSIONS
DISTILLATES
ELEMENTS
ENERGY SOURCES
EQUATIONS
EXPERIMENTAL DATA
FLUID MECHANICS
FOSSIL FUELS
FUELS
GAS OILS
HYDRODYNAMICS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KEROSENE
KINETIC EQUATIONS
KINETICS
LIQUID FUELS
MANGANESE
MECHANICS
MEMBRANE TRANSPORT
MEMBRANES
METALS
MIXTURES
NUMERICAL DATA
OXYGEN COMPOUNDS
PERMEABILITY
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHOSPHORIC ACID
QUANTITY RATIO
SOLUTIONS
STIRRING
SULFATES
SULFUR COMPOUNDS
SUPPORTED LIQUID MEMBRANES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS