Chromium(VI) sorptive removal from aqueous solutions by nanocrystalline akaganeite
Chromium(VI) sorptive removal from aqueous solutions by nanocrystalline akaganeite
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DOI：
10.1016/j.chemosphere.2004.09.007
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发表时间：
2005-01-01
期刊：
影响因子：
8.8
通讯作者：
Deliyanni, EA
中科院分区：
文献类型：
--
作者：
Lazaridis, NK;Bakoyannakis, DN;Deliyanni, EA
在这项研究中，Akaganeite (β-FeO(OH)) 是一种羟基氧化铁材料，被用作一种低成本的潜在吸附剂，用于去除水溶液中的六价铬。搅拌速度、溶液pH值的影响。在批量动力学运行中评估初始铬浓度、吸附剂浓度和温度。结果表明，与简单的反应动力学模型相比，固体扩散模型更好地描述了吸附动力学。 Freundlich 和 Frumkin 等温线最适合平衡结果。在研究条件下，Akaganeite 的吸附容量约为 80mg Cr(VI) g(-1)。浮选被用作有效去除负载材料的下游过程。 (C) 2004 Elsevier Ltd. 保留所有权利。
In this study, akaganeite (beta-FeO(OH)) an ironoxyhydroxide material, was used as a low-cost potential adsorbent for the removal of hexavalent chromium from aqueous solutions. The influence of agitation speed, solution pH. initial chromium concentration, sorbent concentration and temperature were evaluated at batch kinetic runs. It was shown that the solid diffusion model, in comparison to simple reaction kinetic models, described better the sorption kinetics. Freundlich and Frumkin isotherm best fitted the equilibrium results. Akaganeite presented a sorption capacity approximately 80mg Cr(VI) g(-1), under the conditions studied. Flotation was used as a downstream process for the effective removal of the loaded material. (C) 2004 Elsevier Ltd. All rights reserved.