Removal of hydrolyzed Reactive Black 5 from aqueous solution using a polyethylenimine-polyvinyl chloride composite fiber
Removal of hydrolyzed Reactive Black 5 from aqueous solution using a polyethylenimine-polyvinyl chloride composite fiber
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DOI：
10.1016/j.cej.2015.05.069
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发表时间：
2015-11-15
影响因子：
15.1
通讯作者：
Won, Sung Wook
中科院分区：
文献类型：
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作者：
Kim, Mu Hyeon;Hwang, Cho-Hee;Won, Sung Wook
本研究制备了一种高效吸附剂，并将其用于去除水溶液中的阴离子活性染料活性黑5（RB 5）。将聚乙烯亚胺（PEI）和聚氯乙烯（PVC）共混物在水和甲醇的混合溶剂中纺丝，制备了PEI-PVC复合纤维。为了评价PEI-PVC纤维的染料吸附性能，研究了间歇过程中pH值、染料浓度、接触时间和盐浓度对染料吸附性能的影响。水解RB 5吸附的最佳pH范围为pH 2.0-5.3。吸附动力学数据更好地拟合伪二级动力学模型相比，伪一级动力学模型。吸附等温线实验拟合Langmuir模型和PEI-PVC纤维的最大吸收估计。在较低的初始染料浓度下，盐浓度的影响可以忽略不计。然而，RB 5摄取显着降低，在高初始染料浓度的盐浓度增加。通过使用0.01 M NaOH，RB 5容易从负载染料的PEI-PVC纤维上解吸。这些结果表明，PEI-PVC纤维可以成功地用作吸附剂去除废水中的阴离子活性染料。(C)2015爱思唯尔B. V.保留所有权利。
In present research a powerful adsorbent was fabricated and employed for removal of anionic reactive dye, Reactive Black 5 (RB5) from aqueous solutions. Polyethylenimine (PEI)-polyvinyl chloride (PVC) composite fiber was prepared by spinning PEI-PVC blend into the mixture of water and methanol. To evaluate the dye sorption performance of PEI-PVC fiber, various parameters that included the effect of pH, dye concentration, contact time, and salt concentration in a batch process were studied. The optimal pH for hydrolyzed RB5 adsorption was observed in the range of pH 2.0-5.3. The sorption kinetic data were better fitted to the pseudo-second-order kinetic model compared with the pseudo-first-order kinetic model. Adsorption isotherm experiments were fitted to the Langmuir model and the maximum uptake of the PEI-PVC fiber was estimated. At a low initial dye concentration, the effect of salt concentration was negligible. However, RB5 uptake was significantly decreased with increasing salt concentration at a high initial dye concentration. By using 0.01 M NaOH, RB5 was easily desorbed from the dye-loaded PEI-PVC fiber. These findings suggested that PEI-PVC fiber can be successfully used as an adsorbent for removal of anionic reactive dyes from aqueous effluents. (C) 2015 Elsevier B.V. All rights reserved.