چکیده
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In this study double physically crosslinked magnetic hydrogel beads were developed by a simple method
including solution mixing of sodium alginate and poly(vinyl alcohol) (PVA) containing magnetic laponite
RD (Rapid Dispersion). Sodium alginate and PVA were physically crosslinked by Ca2+ and freezingthawing cycles, respectively. Magnetic laponite RD nanoparticles were incorporated into the system to
create magnetic response and strengthen the hydrogels. All hybrids double physically crosslinked hydrogel beads were stable under different pH values without any disintegration. Furthermore, adsorption of
bovineserumalbumin(BSA)onthehydrogelbeadswasinvestigatedonthesubjectofpH,ionstrength,initial BSA concentration, and temperature. Nanocomposite beads exhibited maximum adsorption capacity
for BSA at pH = 4.5. The experimental adsorption isotherm data were well followed Langmuir model and
based on this model the maximum adsorption capacity was obtained 127.3 mg g−1 at 308 K. Thermodynamic parameters revealed spontaneous and monolayer adsorption of BSA on magnetic nanocomposites
beads.
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