| γ-AlOOH/Al2O3修饰硅藻土的制备与Cs+、Pb2+吸附性能 | |
| Fabrication and Highly Efficient Adsorption for Cs+ and Pb2+ of γ-AlOOH/Al2O3 Modified Diatomite | |
| 摘要: 以结晶氯化铝(AlCl3·6H2O)作为铝源,十二烷基苯磺酸钠(SDBS)为模板剂,采用水热法在硅藻土盘上制备了束状纳米结构γ-AlOOH/Al2O3复合吸附剂。采用XRD、SEM、TEM、TG/DSC、N2吸脱附等对样品进行了表征。研究了样品对133Cs+及Pb2+的吸附能力。研究表明,样品γ-AlOOH/硅藻土、γ-Al2O3/硅藻土对Cs+及Pb2+均具有良好的吸附性能,两者对Cs+的去除率分别为98.9%和99.6%;对Pb2+的最大吸附量分别为357.1、416.7mg·g-1。两种样品对Pb2+的吸附均符合Langmuir吸附模型。 | |
| 关键词: 束状纳米结构 复合吸附剂 硅藻土 吸附 吸附模型 | |
| 基金项目: 博士后基金(No.76235),泰安市科技发展计划项目(No.20113054)资助项目。 | |
| Abstract: The composite adsorption materials modified by wispy nanostructure γ-AlOOH or γ-Al2O3 were prepared via one-step hydrothermal method by using crystalline aluminum chloride (AlCl3·6H2O) as the resource of aluminum, sodium dodecylbenzenesulfonate (SDBS) as template and diatomite as the substrate. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), thermogravimetric analysis/differential scanning calorimetry (TG/DSC), and N2 adsorption-desorption measurement. The adsorption capacity for Cs+ and Pb2+ of the samples were investigated. It was found that the samples showed superb adsorption properties for Cs+ and Pb2+. The maximal removal efficiency of the γ-AlOOH/diatomite and γ-Al2O3/diatomite for Cs+ were 98.9 and 99.6%, respectively, and the maximum adsorption capacities for Pb2+ were 357.1 and 416.7 mg·g-1, respectively. Both of the adsorption models for Pb2+ were consistent with the Langmuir adsorption model. | |
| Keywords: wispy nanostructure composite adsorption materials diatomite adsorption adsorption model | |
| 投稿时间：2014-11-18 修订日期：2015-01-22 | |
| 摘要点击次数: 1475 | |
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| 郑广伟,杜玉成,侯瑞琴,孙广兵,王金淑,吴俊书.γ-AlOOH/Al2O3修饰硅藻土的制备与Cs+、Pb2+吸附性能[J].无机化学学报,2015,31(5):930-938. | |
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