纳米碳酸钙表面改性沸石对模拟蔗汁中酚酸的吸附性能OACSTPCD

Objective:This study aimed to explore the adsorption performance and mechanism of phenolic acids in simulated sugarcane juice by nano-calcium carbonate modified zeolite(CaCO3@ZL).Methods:Using zeolite as the supporting framework,a co-precipitation technique was utilized to create nano-calcium carbonate modified zeolite(CaCO3@ZL),which was then employed to simulate the adsorption of phenolic acids in sugarcane juice.Using X-ray diffraction(XRD)and infrared spectroscopy(FTIR),the zeolite's characteristics were examined both before and after alteration.The kinetic model fitting of CaCO3@ZL and static adsorption studies were also conducted.The properties of phenolic acids were studied during adsorption.Results:XRD and FTIR characterization results indicate that the modification process successfully prepared nano-calcium carbonate loaded on the surface of zeolite CaCO3@ZL.Comparing the adsorption test results of CaCO3@ZL to those of the unmodified ZL,the adsorption capacity of phenolic acids increased by 40.34％,with adsorption equilibrium at 600 minutes.The fitting results showed that the adsorption process followed the Freundlich isotherm adsorption model and quasi-second-order adsorption kinetics model.After 5 regenerations CaCO3@ZL still maintains 80.39％of the initial adsorption amount of phenolic acid.Conclusion:The adsorption process rate of CaCO3@ZL on simulated sugarcane juice is mainly controlled by multi-molecular layer adsorption and chemical adsorption.CaCO3@ZL has good regeneration performance and can be used for the removal of phenolic acids in sugarcane juice.