Synthesis Of Lithium Ion-Calix[4]Arene Molecularly Imprinted Polymer And Its Performance Of Extraction Of Lithium Ion From Seawater

Ion imprinted technology is one of the hot researchs in recent years. It has specificity adsorption effect for imprinted ion and it holds great promise for potential applications in the aspects of separation, enrichment, and extraction of metal ions.On the basis of ion imprinting technique, when we compared all of the experimental functional monomer, then chose the para-tertiary butyl calix [4] arene oxygen generation tetraacetic acid as the best functional monomer. So in this paper used the para-tertiary butyl calix [4] arene oxygen generation tetraacetic acid as functional monomer, Li+as template of ion imprinted, Are titanate as the crosslinking agent, HC1as eluent, the solvent is anhydrous ethanol, through the dispersion polymerization method to synthesise calix [4] arene with lithium ions of ions imprinting polymer. The optimum preparation conditions and influence factors was obtianed form Experiment that’s included research the usage amount of monomer and crosslinking agent, reaction time, reaction temperature and so on. Through the single variable method of static adsorption experiment to investigate the adsorption performance of Li+with Lithium ions imprinted polymers (LIIPs) and non Lithium ions imprinted polymers (nllPs).This performance are relate to the adsorption equilibrium time, maximum adsorption capacity, resistance to acid and alkali, the amount of eluent, temperature and repeat usability and selective. By used Fourier infrared spectrometer and scanning electron microscopy (SEM) to ensure the results of characterized. Inorder to acquire affect of the performance of the ions imprinted polymer adsorption with Lithium ions from seawater, Through the experiment contrast the LIIPs and nLIIPs situations in seawater and artificial preparation of competition ions to determine influence factors, then get the best conditions adsorption model of Li+The adsorption effect of lithium was obtained to the thoron spectrophotometric method is used to determination of the absorbance of Li+in eluent and then converted into after concentration, when lithium ion concentration is400mg/L,the temperature is28℃, the adsorption time is6h, eluent is HC1that is concentration of1mol/L and amount of40ml, The LIIPs largest absorption capacity of lithium is22.53mg/g; In the artificial sea water absorption capacity of lithium is5.68mg/g; Ions imprinted polymer can been effectively absorb lithium tested when the pH is5-9; The selective of lithium ion is more than98%when solution of lithium ion was prepared that is containing the alkali metal and alkaline-earth ions of Na+、K+、Mg2+、Ga2+. The absorption capacity is only fell by5%and mass loss is about17%when it was used repeat5times adsorption experiment. It has good application prospect of research because of the molecularly imprinted polymer not only has good stability but also the is good renewable performance.