3种天然矿物型吸附材料对赖氨酸的吸附特性研究

Research for Three Common Minerals in Northern Adsorption Characteristics of Lysine

为了对氨基酸类有机污水的处理以及资源再利用提供理论参考。基于近年来富含氨基酸类的有机污水污染程度日益加剧,试验选用3种天然矿物型吸附材料对赖氨酸的吸附解吸特性进行研究,采用恒温震荡吸附批处理、茚三酮比色测定赖氨酸以及差减法计算和Langmuir、Freundlich方程拟合的研究方法。结果表明:3种天然矿物型吸附材料对赖氨酸的最大吸附量(Qm)表现为沸石>膨润土>硅藻土;对赖氨酸的吸附结合能(K值)表现为硅藻土>膨润土>沸石;1/N值表现为沸石>膨润土>硅藻土;对赖氨酸解吸率表现为沸石>硅藻土>膨润土,滞后程度则相反。因此,若以吸附数量多并解吸后再利用为目标的处理,选用沸石为好;而若以吸附数量尚好但保持相对稳定不易再度污染为目标的处理,选用膨润土为好。

For the amino acid organic wastewater treatment as well as reuse of resources providing a theoretical reference.Based on amino acid-rich organic wastewater pollution increasing in recent years,Experiment selection of three natural mineral-type adsorbents to research the characteristics of adsorption and desorption of Lysine,Experiment used temperature shock absorption batch,Ninhydrin colorimetric determined Lysine and calculated by subtraction.Experiment also used Langmuir,Freundlich equation fitted.The results showed that three natural mineral-type adsorbents’maximum adsorption of Lysine（Qm） expressed that ZeoliteBentonite Diatomite;Adsorption binding energy（K value） expressed that DiatomiteBentoniteZeolite;1/N value expressed that ZeoliteBentoniteDiatomite.Desorption rate of Lysine expressed that ZeoliteDiatomite Bentonite,lag degree was opposite.Therefore,in order to get a large number of adsorption,and to use what was deserted again,it’s best to select Zeolite,and if in order to get a good adsorption and hold stability to prevent pollution,it’s best to select Bentonite.