吸附
化学
壳聚糖
弗伦德利希方程
吸附剂
离子液体
水溶液
谷氨酸
位阻效应
天冬氨酸
丙氨酸
氨基酸
动力学
核化学
无机化学
有机化学
生物化学
催化作用
物理
量子力学
作者
Huixue Ren,Bingjin Li,Markus Neckenig,Daoji Wu,Li Yaqi,Yongshan Ma,Xuemei Li,Na Zhang
标识
DOI:10.1016/j.carbpol.2018.12.043
摘要
Three novel and highly effective AAIL-modified Chitosan (CS) adsorbents are presented. These three new CS-gels were prepared by an innovative synthetic method that uses amino acid ionic liquids (AA-ILs) to cross-link CS with, separately, glutamic acid, aspartic acid and alanine to give novel adsorbents Glu-AA-IL-CS (1), Asp-AA-IL-CS (2) and Ala-AA-IL-CS (3) respectively. The effectively incarcerating host-structures (1) - (3) were characterized by a whole range of techniques including FT-IR, SEM, EDS and XRD. The differences amongst novel adsorbents (1) - (3) with regard to their rate and efficiency of removal of Pb2+ from aqueous solutions are explained in terms of the different electronic, structural and steric features of the three amino acids. The glutamic acid variant (1) is clearly shown to be the best-performing adsorbent by experimental tests and data in combination with infrared spectroscopy. The behaviour of adsorbents (1) follows pseudo-second-order kinetics,and accord best with the Freundlich adsorption isotherm.
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