CaO-Al2O3二元氧化物吸附剂的制备、表征及除氟性能研究*

doi:10.11896/j.issn.1005-023X.2017.016.008

《材料导报》期刊社

2017, Vol. 31

Issue (16): 36-40 https://doi.org/10.11896/j.issn.1005-023X.2017.016.008

材料研究

CaO-Al₂O₃二元氧化物吸附剂的制备、表征及除氟性能研究^*

许乃才^1,2, 史丹丹³, 党力², 洪天增², 董亚萍², 刘忠², 李武²

1 青海师范大学化学系, 西宁 810008;
2 中国科学院青海盐湖研究所, 西宁 810008;
3 青海省科学技术信息研究所,西宁 810008

Preparation, Characterization and Fluoride Adsorption of a CaO-Al₂O₃ Binary Oxide Adsorbent

XU Naicai^1,2, SHI Dandan³, DANG Li², HONG Tianzeng², DONG Yaping², LIU Zhong², LI Wu²

1 Department of Chemistry, Qinghai Normal University, Xining 810008;
2 Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008;
3 Institute of Science and Technology Information of Qinghai Province, Xining 810008

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摘要以δ-Al₂O₃为前驱体,用浸渍及高温焙烧技术制备了结构新颖的CaO-Al₂O₃二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-Al₂O₃除氟率的影响。结果表明,δ-Al₂O₃及CaO-Al₂O₃均为纳米颗粒形貌,具有介孔结构,比表面积分别为167.8 m²/g和72.3 m²/g;在pH=8.0时,CaO-Al₂O₃的除氟效果最佳,当吸附时间超过220 min时,CaO-Al₂O₃的除氟效率明显高于δ-Al₂O₃,且在480 min时F^－的去除率达65.42%。

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	许乃才
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	洪天增
	董亚萍
	刘忠
	李武

关键词: 氧化钙-氧化铝介孔吸附动力学含氟废水

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.

Key words: calcium oxide-aluminun oxide mesoporous structure adsorption kinetics fluorine-containing waste water

出版日期: 2017-08-25 发布日期: 2018-05-07

ZTFLH:

TB383

基金资助: 国家自然科学基金(51302280;51574186)

通讯作者: 李武:通讯作者,男,1966年生,博士,研究员,主要研究方向为盐湖卤水综合利用 E-mail:liwu2016@126.com

作者简介: 许乃才:男,1984年生,博士研究生,讲师,主要研究方向为无机功能材料的制备及应用 E-mail:xunc@qhnu.edu.cn 刘忠:男,1981年生,博士,副研究员,主要研究方向为无机功能材料的设计、合成及结晶动力学 E-mail:liuzhong@isl.ac.cn

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》期刊社, 2017, 31(16): 36-40.
XU Naicai, SHI Dandan, DANG Li, HONG Tianzeng, DONG Yaping, LIU Zhong, LI Wu. Preparation, Characterization and Fluoride Adsorption of a CaO-Al₂O₃ Binary Oxide Adsorbent. Materials Reports, 2017, 31(16): 36-40.

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https://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.016.008 或 https://www.mater-rep.com/CN/Y2017/V31/I16/36

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