| 新型多孔纳米钛酸锶钡的制备及其对Cd~(2+)的吸附性能 |
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| 引用本文： | 王敏,张东,韩德昌,张文杰. 新型多孔纳米钛酸锶钡的制备及其对Cd~(2+)的吸附性能[J]. 硅酸盐学报, 2010, 38(2) |
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| 作者姓名： | 王敏 张东 韩德昌 张文杰 |
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| 作者单位： | 沈阳理工大学环境与化学工程学院,沈阳,110168 |
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| 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,吸附过程的焓变为37.337kJ/mol,各温度下,Gibbs自由能变均为负值,熵变均为正,吸附活化能为32.965kJ/mol,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。
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| 关 键 词： | 反相悬浮聚合 多孔钛酸锶钡 镉离子 吸附行为 |
PREPARATION OF POROUS NANO-BARIUM-STRONTIUM TITANATE AND ITS ADSORPTION BEHAVIOR FOR CADMIUM ION IN WATER |
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| WANG Min,ZHANG Dong,HAN Dechang,ZHANG Wenjie. PREPARATION OF POROUS NANO-BARIUM-STRONTIUM TITANATE AND ITS ADSORPTION BEHAVIOR FOR CADMIUM ION IN WATER[J]. Journal of The Chinese Ceramic Society, 2010, 38(2) |
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| Authors: | WANG Min ZHANG Dong HAN Dechang ZHANG Wenjie |
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| Affiliation: | School of Environmental and Chemical Engineering;Shenyang Ligong University;Shenyang 110168;China |
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| Abstract: | Porous nano-barium strontium titanate adsorbent was successfully 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 kinetics of the adsorption were studied.The results show that the absorbent is porous,perovskite nano-barium-strontium titanate,... |
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| Keywords: | reversed-phase suspension polymerization porous nano-barium strontium titanate cadmium ion adsorption behavior |
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