纳米Fe3O4@（DS-HTlc）的制备及吸附亚甲基蓝  

Synthesis of Nano Fe3O4@（DS-HTlc） and Its Adsorption for Methylene Blue

作　　者：毕浩宇[1] 葛金宝 张雅 周丹 高慧枝 李燕[2] BI Haoyu;GE Jinbao;ZHANG Ya;ZHOU Dan;GAO Huizhi;LI Yan(Department of Biomedical Engineering,Changzhi Medical College,046000;Department of Chemistry,Changzhi University,046011:Changzhi,China)

机构地区：[1]长治医学院生物医学工程系,046000 [2]长治学院化学系,山西长治046011

出　　处：《水处理技术》2019年第12期46-52,共7页Technology of Water Treatment

基　　金：山西省自然科学基金项目（201701D121034）;山西省重点学科建设经费;长治学院科研创新团队建设项目;长治学院大学生创新训练项目（2018DC03）;长治学院“药用植物”学科群学生基金项目（201815）

摘　　要：采用离子交换法制备了具有核-壳结构的、十二烷基硫酸根(DS-)离子含量不同的磁性改性类水滑石(Fe3O4@(DS-HTlc))。通过透射电子显微镜、粉末X射线衍射仪、傅立叶变换红外光谱仪、电感耦合等离子体发射光谱仪、有机元素分析仪、比表面分析仪、微电泳仪和振动样品磁强计等对样品进行了表征,并从吸附动力学和热力学2方面研究了Fe3O4@(DS-HTlc)对阳离子染料亚甲基蓝的吸附。结果表明:Fe3O4@(DS-HTlc)对亚甲基蓝有较好的吸附效果,吸附动力学符合准2级方程;吸附量随层间DS-含量的增多和温度的升高而增加,随pH(5.5~10)改变无明显变化。在外部磁场下,30 s内可从水溶液中分离出Fe3O4@(DS-HTlc),这为去除水中染料提供了简单的一步吸附处理方法。Fe3O4@(DS-HTlc) nanocomposites with core/shell structures modified with varying contents of dodecylsulfate ions were prepared by ion exchange method. The samples were characterized by transmission electron microscope, powder X-ray diffractometer, infrared spectrometer, inductively coupled plasma atomic emission spectroscopy, organic elemental analyzer, specific surface analyzer, electrophorese instrument, and vibrating sample magnetometer.The adsorption properties of Fe3O4@(DS-HTlc) for cationic dye(methylene blue) were studied from adsorption kinetics and thermodynamics. The results showed that Fe3O4@(DS-HTlc) had good adsorption capacities for methylene blue, and the adsorption kinetics conformed to the pseudo-second-order kinetics equation. The adsorption amount increased with the increasing of interlayer DS-anions content and temperature, but did not change significantly with the change of pH(5.5~10). Fe3O4@(DS-HTlc) nanocomposites could be easily separated from aqueous solution by the external magnetic field in 30 s,it offered a simple single step adsorption treatment option to remove dye from water.

关 键 词：磁性 十二烷基硫酸根(DS-) 类水滑石 离子交换法 亚甲基蓝 吸附 

分 类 号：X703.1[环境科学与工程—环境工程]