改性龙眼壳吸附Cr(VI)的性能研究  

Studies on adsorption roperty of Cr( VI) on modified longan shell

作　　者：陈艺敏[1] 陈建发[1] CHEN Yi-min;CHEN Jian-fa(Zhangzhou Vocational Institute of Technology,Zhangzhou 363000 China)

机构地区：[1]漳州职业技术学院食品工程学院,福建漳州363000

出　　处：《新余学院学报》2019年第1期42-46,共5页Journal of Xinyu University

基　　金：福建省自然科学基金项目"基于抗生素类混合工业废水经济高效处理集成技术的研究"(2015J01356)

摘　　要：利用磷酸酯化改性龙眼壳,考察其吸附Cr(VI)的性能,并探讨吸附的动力学和热力学过程。通过SEM分析发现,改性龙眼壳表面孔隙增加,更有利于吸附。FTIR分析发现龙眼壳中羟基参与了酯化改性。龙眼壳改性后对Cr(VI)的吸附能力增强,其吸附过程符合Langergren准二级动力学模型,吸附等温线符合Langmuir模型。The adsorption property of Cr(Ⅵ)on longan shell esterified by phosphoric acid is studied,and the kinetics and thermodynamics of adsorption are discussed.The scanning electron microscopes(SEM)analysis shows that the pores on the surface of modified longan shell increase,which is more conducive to adsorption.The Fourier transform infra-red(FTIR)analysis finds that hydroxyl groups in longan shell are involved in the esterification modification.The adsorption capacity of the modified longan shell of Cr(Ⅵ)enhances.The adsorption process accords with the pseudo-second order kinetic equations of Langergren and the adsorption isotherm conforms to the Langmuir model.

关 键 词：改性龙眼壳 吸附 动力学 热力学 

分 类 号：O647.3[理学—物理化学] X703[理学—化学]