Arsenic adsorption using copper (II) oxide nanoparticles
Arsenic adsorption using copper (II) oxide nanoparticles
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DOI：
10.1016/j.cherd.2011.12.006
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发表时间：
2012-09-01
影响因子：
3.9
通讯作者：
Purkait, M. K.
中科院分区：
文献类型：
--
作者：
Goswami, A.;Raul, P. K.;Purkait, M. K.
砷中毒是当今生活中的一个主要问题。为了降低饮用水中砷的浓度，探索了不同金属基化合物作为砷吸附剂。在本研究中，铜（II）氧化物纳米粒子制备的热处理技术，并用作吸附剂从水中去除砷。利用TEM、BET、XRD和FTIR等手段对吸附剂进行表征，结果表明，所制备的吸附剂为纳米级，比表面积为52.11m2/g，具有良好的吸附性能。系统的吸附实验进行了不同的工艺参数，如接触时间，吸附剂的质量，pH值，温度和搅拌速度，发现氧化铜（II）对砷吸附有很好的效率。对吸附热力学参数和吸附动力学进行了详细的研究，以了解吸附的本质和机理。结果表明，吸附过程符合准二级动力学和吸热行为。吸附平衡用Langmuir和Freundlich模型进行了研究。吸附过程符合Langmuir等温式，吸附容量为1086.2 μ g/g。提出了再生研究，以重复使用的吸附剂，以更好的经济的过程。最后，一个过程的设计计算报告，以了解从水介质中有效地去除砷所需的吸附剂的量。(C)2011年，化学工程师学会。Elsevier B. V.出版，保留所有权利。
Arsenic poisoning is a major problem in today's life. To reduce its concentration in drinking water, different metal based compounds were explored as arsenic adsorbents. In the present study, copper (II) oxide nanoparticles were prepared by thermal refluxing technique and used as an adsorbent for arsenic removal from water. Characterization of the adsorbent using TEM, BET, XRD and FTIR implied that the prepared adsorbent was in nano size and had excellent adsorption behavior with surface area of 52.11 m(2)/g. Systematic adsorption experiments were carried out with different process parameters such as contact time, adsorbent mass, pH, temperature and stirring speed and found that copper (II) oxide had very good efficiency towards arsenic adsorption. Thermodynamic parameters and adsorption kinetics were studied in detailed to know the nature and mechanism of adsorption. Results showed that the adsorption process followed pseudo second order kinetic and endothermic behavior. Adsorption equilibrium was studied with Langmuir and Freundlich isotherm models. The adsorption process followed Langmuir isotherm with an adsorption capacity of 1086.2 mu g/g. A regeneration study was proposed in order to reuse the adsorbent for better economy of the process. Finally, a process design calculation is reported to know the amount of adsorbent required for efficient removal of arsenic from aqueous medium. (C) 2011 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.