Abstract:
Using precipitation polymerization method, acrylamide (AM) as functional monomer, ethylene glycol dimethacrylate (EDMA) as cross-linking agent, the experimental conditions such as the type and amount of porogenic solvent, functional monomer and cross-linker were optimized for prepared 16 cobalt ion (Ⅱ) imprinted polymers (Co(Ⅱ)-IIPs) and corresponding non-imprinted polymers (NIPs). The results of equilibrium adsorption experiments show that the imprinted polymer Co(Ⅱ)-IIP6 prepared under optimal conditions has a large adsorption capacity and a high imprinting factor. The morphology and structure of the optimal polymer Co(Ⅱ)-IIP6 were characterized by scanning electron microscope (SEM) and nitrogen adsorption (BET), and the adsorption properties and selectivity of Co(Ⅱ)-IIP6 were analyzed by Inductively Coupled Plasma Emission Spectrometer (ICP-OES). Compared with the non-imprinted polymer, the results showed that the imprinted polymer had stronger adsorption capacity and better adsorption selectivity for Co (Ⅱ), which indicates that the polymer has better selective recognition ability for Co (Ⅱ) and is expected to be used for the separation and enrichment of Co (Ⅱ) in actual samples.