Defluoridation from aqueous solutions by nano-alumina: Characterization and sorption studies
Defluoridation from aqueous solutions by nano-alumina: Characterization and sorption studies
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DOI：
10.1016/j.jhazmat.2010.11.102
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发表时间：
2011-02-28
影响因子：
13.6
通讯作者：
Sillanpaa, Mika
中科院分区：
文献类型：
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作者：
Kumar, Eva;Bhatnagar, Amit;Sillanpaa, Mika
本研究旨在评价纳米氧化铝（Al2O3）在水溶液中吸附氟的可行性。采用SEM、EDX、XRD和FTIR等分析手段对纯纳米氧化铝和含氟纳米氧化铝的性质和形貌进行了表征。对接触时间、初始氟浓度、温度、pH值和竞争阴离子的影响进行了批量吸附研究。氟吸附动力学拟二阶模型拟合良好。在25℃条件下，纳米氧化铝除氟的最大吸附量为14.0 mg g(-1)， pH值为6.15时，除氟效果最好。用Langmuir等温线模型很好地解释了氟的吸附。氟化物的吸附主要受PO43-、SO42-和CO32-离子的影响。(C) 2010 Elsevier B.V.版权所有
The present study was conducted to evaluate the feasibility of nano-alumina (Al2O3) for fluoride adsorption from aqueous solutions. The nature and morphology of pure and fluoride-sorbed nano-alumina were characterized by SEM with EDX, XRD, and FTIR analysis. Batch adsorption studies were performed as a function of contact time, initial fluoride concentration, temperature, pH and influence of competing anions. Fluoride sorption kinetics was well fitted by pseudo-second-order model. The maximum sorption capacity of nano-alumina for fluoride removal was found to be 14.0 mg g(-1) at 25 degrees C. Maximum fluoride removal occurred at pH 6.15. The fluoride sorption has been well explained using Langmuir isotherm model. Fluoride sorption was mainly influenced by the presence of PO43-, SO42- and CO32- ions. (C) 2010 Elsevier B.V. All rights reserved.