负载型广枣多糖镧降解亚甲基蓝的研究  

Degradation of Methylene Blue by Polysaccharide Lanthanum of Load Type Fructus Choerospondiatis

作　　者：周宏[1] 赵玉英[2,3] 王琳琳 宋娟娟[1] ZHOU Hong;ZHAO Yu-ying;WANG Lin-lin;SONG Juan-juan(College of Chemistry and Materials,Inner Mongolia Minzu University,Tongliao 028043,China;Instrument Equipment and Laboratory Management Center,Inner Mongolia Minzu University,Tongliao 028043,China;School of Health,Guangzhou Huaxia Vocational College,Guangzhou 510900,China)

机构地区：[1]内蒙古民族大学化学与材料学院,内蒙古通辽028043 [2]内蒙古民族大学仪器设备与实验室管理中心,内蒙古通辽028043 [3]广州华夏职业学院卫生健康学院,广东广州510900

出　　处：《内蒙古民族大学学报（自然科学版）》2021年第4期305-308,共4页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：国家自然科学基金项目(21261015);内蒙古自治区自然科学基金项目(2015MS0221);广东省普通高校特色创新项目(2020KTSCSX391)。

摘　　要：将广枣多糖镧负载于硅胶载体上,制备不同配比的负载多糖镧,用于降解有机染料污染物亚甲基蓝,目的是清除对环境产生影响的有机污染物,寻找环境友好材料.具体方法是以硅胶作载体,广枣多糖镧作光催化剂,将两者按照不同比例进行混合研细,将广枣多糖镧负载在硅胶上.以亚甲基蓝溶液作为模拟污染物,在日光照射的条件下降解亚甲基蓝,利用分光光度法测定降解前和降解后亚甲基蓝的含量,来计算降解率.用分光光度计,在波长为664 nm处测定吸光度,亚甲基蓝标准溶液的线性回归方程为:y=129.49x-0.0024,相关系数为r=0.9991,亚甲基蓝的浓度在0.2~7.5 mg·L^(-1)区间内线型关系良好.结果表明,负载型广枣多糖镧的广枣多糖镧与硅胶的比例为1∶13时,亚甲基蓝的降解率最大,为59.6%,降解效果最好,且光照时间越长,降解率越高.In this paper,fructus choerospondiatis polysaccharide lanthanum was loaded on silica gel carrier to prepare different proportions of polysaccharide lanthanum for the degradation of methylene blue,an organic dye pollutant,in order to remove the organic pollutants that have an impact on the environment and find environmentally friendly materials.The concrete method is to use silica gel as the carrier and polysaccharide lanthanum as the photocatalyst,the two are mixed and ground in different proportions,and the polysaccharide lanthanum is loaded on silica gel.Methylene blue solution was used as a simulated pollutant to degrade methylene blue under the condition of sunlight irradiation.The content of methylene blue before and after degradation was measured by spectrophotometry to calculate the degradation rate.Using spectrophotometer,the absorbance was measured at the wavelength of 664 nm.The linear regression equation of methylene blue standard solution was y=129.49x-0.0024,and the correlation coefficient was r=0.9991.The concentration of methylene blue ranged from 0.2 to 7.5 mg·L^(-1) with a good linear relationship.The results showed that when the ratio of lanthanum polysaccharide to silica gel was 1∶13,the degradation rate of methylene blue was the highest,reached 59.6%,and the degradation rate was the best.It also showed that the longer the illumination time,the higher the degradation rate.

关 键 词：分光光度法 多糖镧 亚甲基蓝 广枣 

分 类 号：O657.3[理学—分析化学]