文档介绍：方玉堂等:金属离子掺杂硅胶吸附剂的性能与结构表征· 305 ·第38卷第2期新型多孔纳米钛酸锶钡的制备及其对Cd2+的吸附性能王敏,张东,韩德昌,张文杰(沈阳理工大学环境与化学工程学院,沈阳 110168) 摘要:采用反相悬浮聚合溶胶–凝胶法制备了多孔纳米钛酸锶钡吸附剂,分别采用Fourier变换红外光谱、扫描电镜和X射线衍射进行表征。将该多孔纳米钛酸锶钡应用于水中镉离子的吸附,考察了吸附、洗脱条件对其吸附性能的影响,探讨了吸附热力学和动力学规律。结果表明:采用反相悬浮聚合溶胶–凝胶法合成的多孔材料,由纳米粒径的钛酸锶钡晶体组成,平均晶粒粒径为17nm。当pH值为4~7时,该吸附剂对水中的镉离子有很强的吸附能力。其吸附动力学符合Langmuir吸附等温模型和准二级动力学方程式,,各温度下,Gibbs自由能变均为负值,熵变均为正,,该吸附为吸热的自发的物理过程。吸附后,该吸附剂可用1mol/L硝酸洗脱再生。关键词:反相悬浮聚合;多孔钛酸锶钡;镉离子;吸附行为中图分类号:TB34 文献标志码:文章编号:0454–5648(2010)02–0305–05 PREPARATION OF POROUS NANO-BARIUM-STRONTIUM TITANATE AND ITS ADSORPTION BEHAVIOR FOR CADMIUM ION IN WATER WANG Min,ZHANG Dong,HAN Dechang,ZHANG Wenjie (School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110168, China) Abstract: Porous nano-barium strontium titanate adsorbent was essfully prepared by reversed-phase suspension polymerization and sol–gel method using reversed-phase suspension droplets as the template, and characterized by Fourier transform infrared spectra, scanning electron microscopy and X-ray diffraction. Its adsorption capabilities for cadmium ion were calculated. The thermodynamics and ics of the adsorption were studied. The results show that the absorbent is porous, perovskite nano-barium-strontium titanate, and the average particle diameter of crystalloid in the absorbent is 17nm. This adsorbent has strong