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中文摘要：
利用吸附体系研究了Ca（Ⅱ）与壳聚糖衍生物的吸附动力学行为，动力学模式函数为1／c=kt，螯合反应的速率方程为：dc/dt=-kc^2用^13CNMR和广角X射线衍射（WXRD）分析等对壳聚糖衍生物进行了结构表征，通过红外光谱（IR）和X射线光电子能谱（XPS）研究了壳聚糖衍生物与Ca（Ⅱ）的配位机理。结果表明：配合物中Ca（Ⅱ）与α-酮戊二酸缩壳聚糖（KCTS）中氨基氮原子配位，与羟胺α-酮戊二酸缩壳聚糖（HKCTS）配位的配位原子为-NH-中的氮原子、羟肟酸中的氧原子及羰基中的氧原子。
英文摘要：
A adsorption system was applied to study the adsorption of Ca（ Ⅱ ） ion onto chitosan derivatives, The adsorption isotherms were correlated by dc/dt= - kc^n. By means of linear correlation, the shapes of the isotherm curves were similar to the kinetic function of 1/c=kt and the rate equation was dc/dt=-kc^2 , indicating that the chemical sorption was the rate-limiting step. ^13 CNMR and WXRD characterized the chemical structures of chitosan α-ketoglutaric acid （KCTS） and hydroxamated chitosan α-ketoglutaric acid （HKCTS）. The adsorption mechanism of chitosan derivatives with Ca（ Ⅱ ） was studied by IR and XPS. The results indicated that the nitrogen in -NH- of KCTS were coordination atoms. N atom of amino group, O atom of hydroxamic acid and O atom of carbonyl group in HKCTS coordinated with Ca（ Ⅱ ）.
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