纳米碳酸钙表面改性沸石对模拟蔗汁中酚酸的吸附性能
Study on the adsorption properties of nano-calcium carbonate surface modified zeolite to phenolic acid in simulated cane juice
柳富杰 1黄释慧 1潘莉莉1
作者信息
- 1. 广西科技师范学院食品与生化工程学院,广西来宾 546119
- 折叠
摘要
目的:探讨纳米碳酸钙改性沸石(CaCO3@ZL)对模拟蔗汁中酚酸的吸附性能及其机理.方法:以沸石(ZL)为支撑骨架,通过共沉淀法在沸石表面负载纳米碳酸钙制备纳米碳酸钙改性沸石(CaCO3@ZL)并用于模拟蔗汁中酚酸的吸附.利用X-衍射(XRD)和红外光谱(FTIR)对改性前后的沸石进行表征,通过静态吸附试验和动力学模型拟合研究CaCO3@ZL对酚酸的吸附特性.结果:改性过程成功地在沸石表面负载纳米碳酸钙制备出CaCO3@ZL.CaCO3@ZL相对于未改性的ZL对酚酸的吸附量提高了 40.34％,在600 min达到吸附平衡;CaCO3@ZL对酚酸的吸附过程符合Freundlich等温吸附模型和准二级吸附动力学模型,经过5次再生后CaCO3@ZL对酚酸仍可以保持初次吸附量的80.39％.结论:CaCO3@ZL对模拟蔗汁的吸附过程速率主要为多分子层吸附和化学吸附控制,CaCO3@ZL具有良好的再生性能,可用于蔗汁中酚酸的去除.
Abstract
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.
关键词
沸石/纳米碳酸钙/共沉淀法/吸附/酚酸/蔗汁Key words
zeolite/nano calcium carbonate/coprecipitation/adsorption/phenolic acid/sugarcane juice引用本文复制引用
基金项目
广西自然科学青年科学基金项目(2022GXNSFBA035617)
广西糖资源工程技术研究中心(桂科 AD16450040)
广西高校制糖工程综合技术重点实验室(桂教科研[2016]6号)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据