Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, Canada S7N 5C9.
J Colloid Interface Sci. 2013 Mar 1;393:271-7. doi: 10.1016/j.jcis.2012.10.046. Epub 2012 Nov 7.
β-Cyclodextrin-chitosan-glutaraldehyde terpolymers were synthesized by reacting variable weight fractions of β-cyclodextrin (β-CD) and chitosan (Chi), with a constant amount of crosslinker (glutaraldehyde). The β-CD:Chi:Glu terpolymer sorbents were characterized by FT-IR spectroscopy and TGA. The solid-solution sorption isotherms in aqueous solution for the copolymers were characterized using two spectroscopic methods (UV-Vis and ICAP-OES) for p-nitrophenol (PNP) and the arsenate oxoanion (HAsO(4)(2-)) at alkaline pH conditions. The Sips isotherm model was utilized to obtain sorption parameters at pH 8.5 and 295 K (i.e. sorbent surface area, sorption capacity and removal efficiency) for each copolymer sorbent. The sorbent surface area estimates for the terpolymers at low (T1), medium (T2), and high (T3) weight fractions of β-CD are listed in parentheses (m(2) g(-1)), as follows: T1 (161), T2 (51.2) and T3 (275). The removal efficiencies are dependent on the relative weight fraction of the polysaccharide components (i.e. β-CD and Chi); whereas the removal efficiencies for p-nitrophenolate ranged between 7.3% and 28%, and H(2)AsO(4)(2-) ranged between 23% and 55%.
β-环糊精-壳聚糖-戊二醛共聚物是通过反应不同重量分数的β-环糊精（β-CD）和壳聚糖（Chi）与一定量的交联剂（戊二醛）合成的。β-CD：Chi：Glu 共聚物吸附剂通过傅里叶变换红外光谱和热重分析进行了表征。在碱性 pH 条件下，使用两种光谱方法（UV-Vis 和 ICAP-OES）对共聚物在水溶液中的固溶吸附等温线进行了表征，用于对硝基苯酚（PNP）和砷酸氧阴离子（HAsO(4)(2-)）。利用 Sips 等温线模型在 pH 8.5 和 295 K 下获得了每种共聚物吸附剂的吸附参数（即吸附剂表面积、吸附容量和去除效率）。共聚物中 β-CD 低（T1）、中（T2）和高（T3）重量分数的吸附剂表面积估计值列在括号中（m(2) g(-1)），如下：T1（161）、T2（51.2）和 T3（275）。去除效率取决于多糖成分（即β-CD 和 Chi）的相对重量分数；对硝基苯酚盐的去除效率在 7.3%至 28%之间，而 H(2)AsO(4)(2-)的去除效率在 23%至 55%之间。
