| CaO-Al2O3二元氧化物吸附剂的制备、表征及除氟性能研究 |
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| 引用本文： | 许乃才,史丹丹,党力,洪天增,董亚萍,刘忠,李武.CaO-Al2O3二元氧化物吸附剂的制备、表征及除氟性能研究[J].材料导报,2017,31(16):36-40. |
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| 作者姓名： | 许乃才 史丹丹 党力 洪天增 董亚萍 刘忠 李武 |
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| 作者单位： | 1. 青海师范大学化学系,西宁 810008;青海省科学技术信息研究所,西宁 810008;2. 青海省科学技术信息研究所,西宁,810008;3. 中国科学院青海盐湖研究所,西宁,810008 |
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| 基金项目： | 国家自然科学基金(51302280;51574186) |
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| 摘 要： | 以δ-Al_2O_3为前驱体,用浸渍及高温焙烧技术制备了结构新颖的CaO-Al_2O_3二元复合氧化物吸附剂。用XRD、SEM、FT-IR、TG及BET等手段对产物的晶型、形貌、热稳定性及孔结构等进行了表征。同时,研究了pH值及吸附时间对CaO-Al_2O_3除氟率的影响。结果表明,δ-Al_2O_3及CaO-Al_2O_3均为纳米颗粒形貌,具有介孔结构,比表面积分别为167.8m~2/g和72.3m~2/g;在pH=8.0时,CaO-Al_2O_3的除氟效果最佳,当吸附时间超过220min时,CaO-Al_2O_3的除氟效率明显高于δ-Al_2O_3,且在480min时F-的去除率达65.42%。
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| 关 键 词： | 氧化钙-氧化铝 介孔 吸附 动力学 含氟废水 |
Preparation, Characterization and Fluoride Adsorption of a CaO-Al2O3 Binary Oxide Adsorbent |
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| XU Naicai,SHI Dandan,DANG Li,HONG Tianzeng,DONG Yaping,LIU Zhong and LI Wu.Preparation, Characterization and Fluoride Adsorption of a CaO-Al2O3 Binary Oxide Adsorbent[J].Materials Review,2017,31(16):36-40. |
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| Authors: | XU Naicai SHI Dandan DANG Li HONG Tianzeng DONG Yaping LIU Zhong and LI Wu |
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| Affiliation: | Department of Chemistry, Qinghai Normal University, Xining 810008;Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008,Institute of Science and Technology Information of Qinghai Province, Xining 810008,Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008,Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008,Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008,Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008 and Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008 |
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| Abstract: | A novel binary oxide adsorbent of CaO-Al2O3 was successfully prepared via impregnation technology followed by calcination procedure with δ-Al2O3 as a precursor.The adsorbent was thoroughly characterized by XRD,SEM,FT-IR,TG and BET technics in order to investigate its crystalline,morphology,thermal stability and structural properties.At the same time,the effects of pH and adsorption time on the fluoride removal were thoroughly studied by a batch of adsorption experiments.The experimental results indicated that both δ-Al2O3 and CaO-Al2O3 present nano-sized particle morphology with mesoporous structure.The specific BET surface areas of δ-Al2O3 and CaO-Al2O3 were 167.8 m2/g and 72.3 m2/g,respectively.The optimal pH value for fluoride removal by CaO-Al2O3 was about 8.0.Adsorption capacity of CaO-Al2O3 was higher than Al2O3 when the adsorption time exceeded 220 min,and the fluoride removal rate reached 65.42％when the adsorption time was 480 min. |
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| Keywords: | calcium oxide-aluminun oxide mesoporous structure adsorption kinetics fluorine-containing waste water |
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