铝柱撑蒙脱石对环丙沙星的吸附性能研究  

Adsorption Properties of Ciprofloxacin on Al-Pillared Montmorillonite

作　　者：李春生 陈玲霞 庄钧懿 吴小贤 张冲 Li Chunsheng;Chen Lingxia;Zhuang Junyi;Wu Xiaoxian;Zhang Chong(Zhejiang Institute of Geology&Mineral Resources,Hangzhou,Zhejiang 310007;Engineering Research Center of Non-metallic Minerals of Zhejiang Province,Hangzhou,Zhejiang 310007;Key Laboratory of Groundwater Conservation of Ministry of Water Resources(in preparation),Beijing 100083;School of Water Resources and Environment,China University of Geosciences(Beijing),Beijing 100083)

机构地区：[1]浙江省地质矿产研究所,浙江杭州310007 [2]浙江省非金属矿工程技术研究中心,浙江杭州310007 [3]水利部地下水保护重点实验室(筹),北京100083 [4]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《非金属矿》2022年第5期79-82,88,共5页Non-Metallic Mines

基　　金：浙江省自然科学基金-青山湖科技城联合基金(LQY19E090001)。

摘　　要：以钠化改性蒙脱石(Na-Mt)为原料,采用羟基铝柱化剂进行交联反应制备铝柱撑蒙脱石(Al-Mt),研究其对环丙沙星(CIP)吸附性能。Na-Mt和Al-Mt的结构表征表明,Al-Mt的d(001)从1.20 nm增至1.81 nm,比表面积从63.78 m^(2)/g增至90.22 m^(2)/g。吸附试验结果表明,在pH值为7,Al-Mt质量浓度为0.2 g/L,CIP初始质量浓度为66.77 mg/L时,吸附72 h达到平衡,CIP在Al-Mt上的吸附过程符合伪二级吸附动力学模型;吸附等温试验表明,Langmuir模型对环丙沙星在Al-Mt上的吸附试验数据拟合效果较好,相关系数R^(2)为0.941,在pH值为7时,Al-Mt对环丙沙星的Langmuir吸附容量为156 mg/g;Al-Mt对环丙沙星的吸附量随pH值增大而显著减小。Using hydroxy aluminum as the pillaring agent and sodium-modified montmorillonite(Na-Mt)as raw material,the Al-pillared montmorillonite(Al-Mt)materials were prepared by cross-linking reaction,and its adsorption properties towards ciprofloxacin(CIP)in aqueous solution were investigated.The characterization results showed that the d(001)peak value of Al-Mt increased from 1.20 nm to 1.81 nm,and the specific surface area increased from 63.78 m^(2)/g to 90.22 m^(2)/g.The adsorption test results showed that when the pH value was 7,the mass concentration of Al-Mt was 0.2 g/L,and the concentration of CIP was 66.77 mg/L,the system reached equilibrium in 72 h,and the Pseudo-second-order kinetic model could better define the experimental data,and the isotherm adsorption data fitted well with the Langmuir model,R^(2) and adsorption capacity were found to be 0.941 and 156 mg/g.The adsorption capacity of Al-Mt for ciprofloxacin decreased significantly with the increase of pH value.

关 键 词：铝柱撑蒙脱石 环丙沙星 吸附 LANGMUIR模型 

分 类 号：TQ424.2[化学工程] X703[环境科学与工程—环境工程]