Ion-exchange kinetics and thermal decomposition characteristics of Fe2+-exchanged alginic acid membrane for the formation of iron oxide nanoparticles
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The ion-exchange kinetics of Fe2+ cations in aqueous solution with H+ from alginic acid have been analyzed in this study as a function of contact time lengths using inductively coupled plasma-atomic emission spectrometry analysis. The kinetic parameters have been evaluated using pseudo 1st or 2nd order models, and a consistent ion-exchange mechanism is suggested. Furthermore, an insight into the calcination of Fe2+ ion-exchanged alginic acid process has been obtained by using simultaneous thermo-gravimetric analysis coupled with differential scanning calorimetry and high temperature X-ray diffraction.
ZW wishes to thank IMR for partial financial aid. The authors wish to thank IMR, IPSE, and SPEME for providing research facilities and infrastructure. The authors wish to thank Dr. AM Cunliffe for assistance with TGA/DSC and ICP-AES analysis.
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