Magnetic ion-imprinted polymer based on mesoporous silica for selective removal of Co(II) from radioactive wastewater
Hyunkyu Lee, Jung-Weon Choi, Sang-June Choi
Abstract
A magnetically separable Co(II)-imprinted polymer based on mesoporous silica (mag@silica-CIP) was synthesized for use as an adsorbent for the selective removal of Co(II). The optimal pH for Co(II) adsorption was found to be 5. Increasing the amount of the Co(II)-imprinted polymer layer on the surface of mag@silica led to an increase in the maximum adsorption capacity for Co(II). The mag@silica-CIP selectively adsorbed Co(II) even in the presence of competing species such as Fe(II), Ni(II), and Mn(II) ions. Thermodynamic experiments revealed that the adsorption of Co(II) by mag@silica-CIP is an endothermic and spontaneous process.
Topics & Concepts
ChemistryAdsorptionMesoporous silicaEndothermic processPolymerSilica gelMesoporous materialNuclear chemistryInorganic chemistryChemical engineeringCatalysisChromatographyOrganic chemistryEngineeringAnalytical chemistry methods developmentChemical Synthesis and CharacterizationRadioactive element chemistry and processing