Nitrate removal from water by nano-alumina: Characterization and sorption studies
Nitrate removal from water by nano-alumina: Characterization and sorption studies
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DOI：
10.1016/j.cej.2010.08.008
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发表时间：
2010-10-01
影响因子：
15.1
通讯作者：
Sillanpaa, Mika
中科院分区：
文献类型：
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作者：
Bhatnagar, Amit;Kumar, Eva;Sillanpaa, Mika
本研究旨在评估纳米氧化铝去除水溶液中硝酸盐的可行性。采用XRD、FTIR、BET、SEM等分析手段对吸附剂的性质和形貌进行了表征。批次吸附研究作为接触时间，初始硝酸盐浓度，温度，pH值和其他干扰阴离子的影响的函数进行。硝酸盐的吸附动力学符合准二级动力学模型。纳米氧化铝对硝酸盐的最大吸附量约为100 mg/L。4.0 mg g（-1），25 +/- 2 ℃。最大硝酸盐去除发生在平衡pH约。4.4.利用Langmuir等温吸附模型对硝酸盐的吸附进行了较好的解释。这项研究的结果表明，纳米氧化铝去除水中硝酸盐的潜在效用。(C)2010 Elsevier B. V.保留所有权利。
The present study was conducted to evaluate the feasibility of nano-alumina for nitrate removal from aqueous solutions. The nature and morphology of sorbent was characterized by XRD, FTIR, BET and SEM analysis. Batch adsorption studies were performed as a function of contact time, initial nitrate concentration, temperature, pH and influence of other interfering anions. Nitrate sorption kinetics was well fitted by pseudo-second-order kinetic model. The maximum sorption capacity of nano-alumina for nitrate removal was found to be ca. 4.0 mg g(-1) at 25 +/- 2 degrees C. Maximum nitrate removal occurred at equilibrium pH ca. 4.4. The nitrate sorption has been well explained using Langmuir isotherm model. Results from this study demonstrated the potential utility of nano-alumina for nitrate removal from water. (C) 2010 Elsevier B.V. All rights reserved.