Со(ІІ) and Ni(II) Removal from Aqueous Solutions by Polymer and Polymer/Silica Adsorbents with Sulfo and Carboxyl groups

Sulfo and carboxyl group-containing polymers polymer/silica adsorbents poly(acrylonitrile-co-2-acrylamido-2-methylpropane-1-sulfonic acid-co-acrylic acid-co-N,N’-methylene-bis-acrylamide) [poly(AN-co-AMPS-co-AAco-MBA)] poly(AN-co-AMPS-co-AA-co-MBA)/SiO2 were synthesized by a UV-initiated polymerization or simultaneous in situ sol-gel process used as for removal of Co(II) Ni(II) ions from aqueous solutions. The adsorption capacity the effect pH have been studied. poly(AN-co-AMPS-co-AA-co-MBA) adsorbent exhibited high efficiency: up to 91.8 % 89.7 Ni(II). Polymer/silica showed higher compared pure polymer. kinetics found be satisfactorily described pseudo-second-order reaction equation Lagergren kinetic model, suggesting ion-exchange nature process.