Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10260925 | Chemical Engineering Journal | 2011 | 7 Pages |
Abstract
The kinetics and mechanism for the ion-exchange processes like Mg2+-H+, Ca2+-H+, Sr2+-H+, Ba2+-H+, Ni2+-H+, Cu2+-H+, Mn2+-H+ and Zn2+-H+ at different temperatures using approximated Nernst-Plank equation under the particle diffusion controlled phenomenon were studied for the poly-o-methoxyaniline Zr(IV) molybdate composite cation-exchanger. Some physical parameters, i.e. fractional attainment of equilibrium U(Ï), self-diffusion coefficients (D0), energy of activation (Ea) and entropy of activation (ÎS*) have been estimated. These investigations revealed that the equilibrium is attained faster at higher temperature probably due to availability of thermally enlarged matrix of poly-o-methoxyaniline Zr(IV) molybdate composite cation exchange material. These results are useful for predicting the ion-exchange process occurring on the surface of this cation-exchanger.
Keywords
DMWParticle radiusAmmonium persulphate(NH4)2S2O8Entropy of activationEDTAEnergy of activationZirconium oxychlorideTemperatureIon-exchange kineticsi.d.SlopeSelf-diffusion coefficientsInternal DiameterOrganic–inorganic composite materialammonium molybdateMobility ratioCharge ratioCation-exchangerMetal ionhydrogen ion
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Zeid A. Al-Othman, Inamuddin Inamuddin, Mu. Naushad,