摘要
采用离子交换法制备了不同交换量的CuY分子筛吸附剂。分别使用扫描电子显微镜(SEM)和X-射线衍射(XRD)对其进行表征,并研究了其对四环素的吸附性能。XRD结果表明,交换上的Cu2+不影响Y分子筛的晶型和骨架结构。四环素在CuY分子筛上吸附动力学符合伪二级动力学模型。吸附实验结果表明:四环素在CuY分子筛的吸附明显强于Y分子筛,并且其吸附量随着Cu2+交换量增加以及温度的升高而增大;溶液的pH值对CuY分子筛吸附四环素的影响较大,其吸附大小顺序为中性>碱性>酸性。
The CuY-zeolites were prepared by ion-exchange method,and characterized by scanning electron microscope（SEM） and X-ray diffraction（XRD）.Then the adsorption of tetracycline on CuY-zeolites was investigated.The exchanged copper does not affect the crystalline phase and skeleton of the Y-zeolite.Adsorption kinetic of tetracycline on CuY-zeolite could be well described by the pseudo-second order kinetic model.Adsorption experimental results show that tetracycline adsorption on CuY-zeolite is much stronger than adsorption on Y-zeolite.Additionally,the adsorption increases with increasing copper content and temperature.The pH value of the solution significantly affects the tetracycline adsorption on CuY-zeolite,in an order of neutral alkaline acidic.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2012年第3期453-458,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21077050)
科技部国际科技合作(No.2010DFA91910)
江苏省自然科学基金(No.BK2010051)资助项目
