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Removal of colorant from simulated wastewater by phyco-composite material: Equilibrium, kinetic and mechanism studies in a lab-scale application

机译:藻类复合材料去除模拟废水中的色料:实验室规模应用中的平衡,动力学和机理研究

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摘要

The biosorption properties of a novel phyco-composite material composed of Spirogyra sp. and Rhizocionium sp. filamentous green algal biomasses for a model colorant (Basic Red 46, Br46) from simulated wastewater were first explored with respect to medium pH, biomaterial quantity, colorant concentration and contact time. The pseudo-second-order model represented the biosorption kinetic data well. Among biosorption isotherm models, Sips model provided the best fit to the equilibrium data. The phyco-composite biosorbent exhibited best performance at pH 9 with maximum biosorption capacity of 55.953 mg g(-1) for Br46. The mean free energy (E) from Dubinin-Radushkevich isotherm equation and the standard Gibbs free energy change (Delta G degrees) revealed a feasible, spontaneous and physical biosorption process. Thus, this novel composite material can be used as a promising biosorbent to remove such unsafe colorants from aqueous media. (C) 2016 Elsevier B.V. All rights reserved.
机译:一种由螺旋藻组成的新型藻类复合材料的生物吸附特性。和根瘤菌属。首先针对中等pH,生物材料量,着色剂浓度和接触时间,探索了来自模拟废水的模型着色剂(碱性红46,Br46)的丝状绿色藻类生物量。伪二级模型很好地表示了生物吸附动力学数据。在生物吸附等温线模型中,Sips模型为平衡数据提供了最佳拟合。 phyco复合生物吸附剂在pH 9时表现出最佳性能,对Br46的最大生物吸附能力为55.953 mg g(-1)。 Dubinin-Radushkevich等温方程式和标准吉布斯自由能变化(ΔG度)的平均自由能(E)显示了可行,自发和物理的生物吸附过程。因此,这种新颖的复合材料可用作有前途的生物吸附剂,以从水性介质中去除这种不安全的着色剂。 (C)2016 Elsevier B.V.保留所有权利。

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