机构地区: 武汉理工大学资源与环境工程学院
出 处: 《广州化工》 2011年第18期76-78,共3页
摘 要: 以硝酸铁、天然钙基蒙脱石为原料制备羟基铁蒙脱石,通过XRD分析、表面酸碱滴定实验和pH等温吸附实验,探讨羟基铁蒙脱石界面吸附罗丹明-B的机理。实验结果发现在零电荷点pHzpc=5,罗丹明-B在羟基铁蒙脱石表面的吸附机理主要是形成氢键而发生络合吸附反应;在最大吸附量pH=4时,其吸附主要是静电吸附和形成氢键而发生络合吸附。 Preparation of hydroxy-Fe montmorillonite using Ferric chloride and natural calcium-based montmorillonite,through X-ray diffraction analysis,surface acid-base titration experiments and pH isothermal adsorption experiment,the adsorption mechanism of rhodamine B on hydroxy-Fe montmorillonite surface.The results showed that the main adsorption mechanism of the rhodamine B on Hydroxy-Fe montmorillonite surface was discussed surface complexation by forming hydrogen bonds at the point of zero charge pHzpc=5,and electrostatic absorption and surface complexation by forming hydrogen dominated at the point of maximum adsorption capacity pH=4.
关 键 词: 羟基铁蒙脱石 罗丹明 界面吸附 氢键与表面络合 静电吸附
领 域: [化学工程]