Treatment of copper(II) containing wastewater by a newly developed ligand based facial conjugate materials
Treatment of copper(II) containing wastewater by a newly developed ligand based facial conjugate materials
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DOI：
10.1016/j.cej.2015.11.108
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发表时间：
2016-03-15
影响因子：
15.1
通讯作者：
Sheikh, Md Chanmiya
中科院分区：
文献类型：
--
作者：
Awual, Md Rabiul;Hasan, Md Munjur;Sheikh, Md Chanmiya
基于功能配体嵌入介孔共轭材料，开发了一种灵敏、选择性的比色方法，可同时检测和去除污染水样中的铜（Cu（II））离子。还介绍了合成材料的表征。在 Cu (II) 离子存在下，根据 pH 值，缀合物材料表现出从无色到深黄色的明显颜色变化。此外，还可以通过肉眼检测并去除 Cu(II) 离子。即使在存在其他竞争离子的情况下，所制备的材料在添加 Cu(II) 离子后也表现出显着的颜色变化，并且检测限计算为 0.15 μg/L。由于 Cu(II) 离子和共轭材料的有机配体之间形成了特定的络合物，因此观察到对 Cu(II) 离子的优异选择性。在Cu(II)吸附操作中，考察了溶液pH、接触时间、初始Cu(II)离子浓度、杂质离子和回用等影响因素。结果表明，该共轭材料表现出优异的吸附能力，并能迅速达到吸附平衡。吸附结果与Langmuir吸附等温线吻合良好，材料对Cu(II)离子的最大吸附容量为174.76 mg/g。我们从这项研究中声称，可以通过当前工作中开发的吸附方法成功检测和去除 Cu(II)。目前的工作显然比传统的多步骤过程更简单、更环保。结果表明，负载Cu(II)离子的缀合物材料可以利用HCl溶液有效再生，并且再生材料可以重复使用多次，容量没有明显损失，表明所制备的缀合物材料具有良好的稳定性。 (C) 2015 Elsevier B.V. 保留所有权利。
A sensitive and selective colorimetric method for simultaneous detection and removal of copper (Cu(II)) ion from contaminated water samples was developed based on the functional ligand embedded mesoporous conjugate materials. The synthesized material's characterization was also presented. The conjugate materials exhibited an obvious color change from colorless to dark yellow in the presence of Cu (II) ion according to the pH values. Also, the Cu(II) ion were detected and removed through naked-eye. The prepared material exhibited significant color change upon addition of Cu(II) ion even in the presence of other competing ions, and the limit of detection was calculated to be 0.15 mu g/L. Excellent selectivity toward Cu(II) ion was observed due to a specific complex formation between Cu(II) ion and organic ligand of the conjugate materials. In Cu(II) adsorption operation, several affecting factors, including the solution pH, contact time, initial Cu(II) ion concentration, foreign ions and reuses were investigated. The results showed that the conjugate materials exhibited excellent adsorption capacity and adsorption equilibrium was reached rapidly. The adsorption results were well fitted with Langmuir adsorption isotherms and the maximum adsorption capacity by the materials for Cu(II) ion was 174.76 mg/g. We claimed from this study that Cu(II) could be successfully detected and removed by the adsorption method developed in the current work. The present work is obviously much simpler and greener than the conventional comprising multistep processes. The results demonstrated that Cu(II) ion loaded conjugate materials was effectively regenerated using HCl acid solution, and the regenerated materials was repeated to use many cycles without significant capacity loss, indicating the good stability of prepared conjugate materials. (C) 2015 Elsevier B.V. All rights reserved.