MgO/La_(2)O_(3)CO_(3)复合材料对磷酸盐的吸附特征  

Phosphorus adsorption characteristics of MgO/La_(2)O_(3)CO_(3) composite

作　　者：赵嫦欣 聂凡贵 程福龙 吴小群 刘芳[1] 潘杰[1,2] Zhao Changxin;Nie Fangui;Cheng Fulong;Wu Xiaoqun;Liu Fang;Pan Jie(Chongqing Three Gorges University,Chongqing 404100;Chongqing Three Gorges University,Chongqing Municipal Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir Area,Chongqing 404100)

机构地区：[1]重庆三峡学院,重庆404100 [2]重庆三峡学院,三峡库区水环境演变与污染防治重庆市级重点实验室,重庆404100

出　　处：《化工新型材料》2022年第2期206-210,共5页New Chemical Materials

基　　金：国家自然科学基金(31670467);万州区科技创新项目(wzstc-2020062)。

摘　　要：采用水热法制备了MgO/La_(2)O_(2)CO_(3)复合材料(ML)。采用X射线衍射仪和扫描电子显微镜对其结构及表面形貌进行了表征,利用Zeta电位仪测定了其零点电位点,并探究了接触时间、初始磷酸盐浓度和初始pH对磷酸盐吸附效果的影响。结果表明,ML呈现板块状堆叠而成的层状结构,零点电位点为4.52。准二级动力学模型和Freundlich模型更适合描述ML对磷酸盐的吸附过程。由Langmuir模型拟合得到最大吸附量可达110.24mg/g。其对磷酸盐的吸附量随pH的升高逐渐下降。The MgO/La_(2)O_(2)CO_(3) composite material(ML)was prepared by hydrothermal method.X-ray diffraction and scanning electron microscopy were used to characterize its structure and surface morphology.The zeta potentiometer was used to determine its zero potential point,and the effect of contact time,initial phosphate concentration and initial pH were investigated for phosphate adsorption.The results showed that ML presented a layered structure of stacked plates.The zero potential point of MLwas 4.52.The quasi-second-order kinetic model and Freundlich model were more suitable to describe the adsorption process of ML to phosphate.The maximum adsorption capacity obtained by Langmuir model fitting reached 110.24mg/g.The adsorption capacity of ML to phosphate gradually decreased with the increase of pH.

关 键 词：氧化镁 碳酸氧化镧 复合材料 吸附 磷酸盐 

分 类 号：X703[环境科学与工程—环境工程]