壳聚糖对锆离子吸附性能研究

The Research of the Function to the Chitosan Adsorb the Ion of Zirconium

摘要: 用分光光度法研究壳聚糖对锆离子的吸附性能.分别探讨了时间、温度、pH值以及外加离子浓度对壳聚糖(CTS)吸附锆离子的影响.结果表明:壳聚糖对锆离子的吸附,开始时比较快,20min后吸附速率显著变慢;温度愈高,吸附量(率)愈大;pH值的影响较为显著,当pH=9左右时,吸附量最大;NaCl溶液对壳聚糖吸附具有抑制作用,NaCl的浓度越大,抑制作用越明显;壳聚糖对锆离子的吸附,服从Arrhenius方程,吸附表观活化能Ea=3.197kJ/mol.并用IR、XRD及XPS等检测结果证实了壳聚糖与锆离子之间配位键的存在,说明壳聚糖对锆离子的吸附主要是化学吸附.

Abstract: Chitosan adsorption to zirconium(Zr) by spectrophotometric method for the determination micro Zr was studied. The different factors effect on the adsorption such as time,temperature,pH value,external ion density had been discussed . The results show that adsorption rate was rapid only in first 20 minutes.A high temperature was good to adsorption and the best adsorption was got when the pH value was 9;The NaCl solution had the function of surpress adsorption of the chitosan and the NaCl density was bigger.Th...