摘要
以拟薄水铝石为前驱体,硝酸为胶溶剂,采取溶胶与喷雾干燥相结合的方法,目的是得到微米级尺寸的成球性良好的多孔氧化铝微球,并探讨其吸附性能.经研究发现,溶胶体系在pH值为3,固含量为25%时经喷雾干燥所得产物形貌最佳.通过对制得的多孔氧化铝微球吸附甲基紫实验结果可知,多孔氧化铝微球动力学吸附行为满足伪二级动力学方程,热力学行为满足Langmuir等温吸附方程,是自发、放热且趋于有序的单分子层吸附行为,去除率可达96.44%.
Spheric and porous alumina microspheres were obtained by sol-spray drying method using pseudo-boehmite as precursor and nitric acid as peptizing agent,and the adsorption properties were studied.It is found that the sol system micro-sized porous alumina microspheres with good sphericity can be obtained by spray drying at pH=3 and solid content of 25 wt%.According to the experiment results of adsorption of methyl violet on the as-prepared porous alumina microspheres,the kinetic adsorption behavior of the porous alumina microspheres meets the pseudo-second-order kinetic equation,and their thermodynamic behavior meets the Langmuir isothermal adsorption equation.The adsorption is a spontaneous,exothermic monolayer adsorption behavior that tends to be orderly with the removal rate of 96.44%.
作者
刘冰倩
王晶
顾士甲
江菀
郑禹
孙子婷
史忠祥
LIU Bingqian;WANG Jing;GU Shijia;JIANG Wan;ZHENG Yu;SUN Ziting;SHI Zhongxiang(Liaoning Key Laboratory for Fabrication and Application of Superfine Inorganic Powders,Dalian Jiaotong University,Dalian 116028,China;College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)
出处
《大连交通大学学报》
CAS
2020年第1期85-91,共7页
Journal of Dalian Jiaotong University
基金
国家重点研发计划资助项目(2017YFB0310300)
辽宁省教育厅科学研究计划资助项目(JDL2016002)
关键词
喷雾干燥
溶胶
拟薄水铝石
氧化铝微球
等温吸附方程
吸附动力学
spray drying
sol
pseudo-boehmite
alumina microspheres
isothermal adsorption equation
adsorption kinetics
