| RESEARCH PAPER |
|
|
|
|
|
Controllable Synthesis of Mesoporous Alumina with Excellent
Defluoridation Performance |
| XU Naicai1,2,3, HONG Tianzeng1,3, LIU Zhong1, ZHANG Xiangfei1,3, DONG Yaping1, LI Wu1
|
1 Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008;
2 Department of Chemistry,
Qinghai Normal University, Xining 810008;
3 University of Chinese Academy of Science, Beijing 100049 |
|
|
|
|
Abstract A series of mesoporous alumina with different crystalline types were successfully synthesized by using hydrothermal and high temperature roasting technologies, which employed sodium aluminate and aluminium chloride as the aluminum source, and glucose as the template agent. Structures, morphologies and textural properties of the products were characterized by XRD,SEM and BET, and defluoridation effects of the synthesized mesoporous alumina with different crystalline types were investigated by batch adsorption experiments. The experimental results showed that γ-Al2O3 prepared at 550 ℃ calcination temperature exhibited the excellent performance for fluoride removal. The adsorption isotherm was better described by the linear Langmuir model with a maximum adsorption capacity of 5.96 mg/g. The adsorption kinetics experiments indicated a high fluoride adsorption rate, as more than 90% fluoride ions were adsorbed within 5 minute. In addition, the adsorption kinetics was well fitted with linear pseudo-second-order mo-del, with a correlation coefficient value (R2) of 0.992 1. According to the results of the present study, the adsorption mechanism may involve ion exchange between F- and OH-.
|
|
Published: 02 May 2018
|
|
|
|
|
1 Amini M, Mueller K, Abbaspour K C, et al. Statistical modeling of global geogenic fluoride contamination ingroundwaters[J].Environ Sci Technol,2008,42(10):3662.
2 Hu C Y, Lo S L, Kuan W H, et al. Removal of fluoride from semiconductor wastewater by electrocoagulation-flotation [J]. Water Res,2005,39:895.
3 Jin H Y, Ji Z J, Yuan J, et al. Research on removal of fluoride in aqueous solution by alumina-modified expanded graphite composite [J]. J Alloys Compd,2015,620:361.
4 Meenakshi, Maheshwari R C. Fluoride in drinking water and its removal [J]. J Hazard Mater,2006,137:456.
5 Harrison P T C. Fluoride in water: A UK perspective [J]. J Fluorine Chem,2005,126:1448.
6 Huang K, Shao J G, Zhu H M, et al. Removal of fluoride from aqueoussolution onto Zr-loaded garlic peel (Zr-GP) particles [J]. J Cent South University,2011,18:1448.
7 Ji G J, Li M M, Li G H, et al. Hydrothermal synthesis of hierarchical micron flower-like γ-AlOOH and γ-Al2O3 superstructures from oil shale ash [J].Powder Technol,2012,215-216:54.
8 Peng C, Zhang J L, Xiong Z G,et al. Fabrication of porous hollow γ-Al2O3 nanofibers by facile electrospinning and its application for water remediation [J]. Micropor Mesopor Mater,2015,215:133.
9 Zhao G, Xia L, Zhong B, et al. Large-scale fast synthesis of single-crystalline alpha-alumina nanotubes [J]. Ceram Int,2015,41:2590.
10 Yang C, Gao L L, Wang Y X, et al. Fluoride removal by ordered and disordered mesoporous aluminas [J]. Microporous Mesoporous Mater,2014,197:156.
11 Wu Y C, Song Z Y, Yang Y, et al. Mechanism and control of α-phase transformation of alumina [J]. Chin J Rare Metals,2004,28(6):1043(in Chinese).
吴玉程, 宋振亚, 杨晔, 等. 氧化铝α相变及其相变控制的研究 [J]. 稀有金属,2004,28(6):1043.
12 Kruk M, Jaroniec M. Gas adsorption characterization of ordered organic-inorganic nanocomposite materials [J]. Chem Mater,2001,13(10):3169.
13 Huo Q S, Leon R, Petroff P M, et al. Mesostructure design with gemini surfactants: Supercage formation in a three-dimensional hexagonal array[J]. Science,1995,268(5215):1324.
14 Matos J R, Kruk M, Mercuri L P, et al. Ordered mesoporous silica with large cagelike pores: Structural identification and pore connectivity design by controlling the synthesis temperature and time [J]. J Am Chem Soc,2003,125(3):821.
15 Wang S Y, Li X A, Wang S F, et al. Synthesis of γ-alumina via precipitation in ethanol [J]. Mater Lett,2008,62(20):3552.
16 Teng S X, Wang S G, Gong W X, et al. Removal of fluoride by hydrous manganese oxide-coated alumina: Performance and mechanism [J]. J Hazard Mater,2009,168:1004.
17 Tang D D, Zhang G K. Efficient removal of fluoride by hierarchical Ce-Fe bimetal oxides adsorbent: Thermodynamics, kinetics and mechanism [J]. Chem Eng J,2016,283:721.
18 Ma J Q, Shen Y, Shen C S, et al. Al-doping chitosan-Fe(Ⅲ) hydrogel for theremoval of fluoride from aqueous solutions [J].Chem Eng J,2014,248:98.
19 Chen N, Zhang Z Y, Feng C P, et al. Investigations on the batch and fixed-bedcolumn performance of fluoride adsorption by Kanuma mud [J].Desalination,2011,268:76.
20 Zhang G K, He Z L, Xu W. A low-cost and high efficientzirconium-modified-Na-attapulgite adsorbent for fluoride removal fromaqueous solutions [J].Chem Eng J,2012,183:315.
|
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2017, Vol. 31 
