Ion Imprinted Sodium Alginate Hydrogel Beads Enhanced with Carboxymethyl Cellulose and β-Cyclodextrin to Improve Adsorption for Cu2+

To achieve efficient adsorption and recycling of Cu2+ in wastewater, using as template ion, glutaraldehyde crosslinker, three sodium alginate hydrogel beads including SA, SAC, SAB were prepared by imprinting sol–gel method (SA) with carboxymethyl cellulose (CMC) β-cyclodextrin (β-CD) different precursors, respectively. Scanning electron microscopy Fourier transform infrared spectroscopy used to characterize analyze morphology composition change the beads, When mass ratio SA CMC or β-CD reach 1:1, SAC are nearly homogeneous sphere. Then effects pH, time, initial concentration Cu2+, adsorbent dosage, coexisting ions on efficiency investigated. The results indicated that adding into skeleton increased toughness improved capacity Cu2+. Compared saturated 510 mg/g reached 817 822 mg/g, And their for over 95% at 25 °C pH 7, contact time within 350 min, dosage 4 mg/50 mL, 5 mg/L. Thus, could be material detecting removing from wastewater.