Removal of acid dye from wastewater by cloud point extraction and regeneration of surfactant by pH regulation

IF 1.2 4区工程技术 Q4 CHEMISTRY, APPLIED

Tenside Surfactants Detergents Pub Date : 2024-01-01 DOI:10.1515/tsd-2023-2557

H. Ghouas, Abdelkader Benderrag, B. Haddou, Cristophe Gourdon

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引用次数: 0

Abstract

Abstract This work concerns the coacervate extraction of industrial dye, namely Acid Green 9 (AG-9) from aqueous solution by nonionic surfactant Lutensol AO7 and TX-114 (readily biodegradable). Binary water/surfactant and pseudo-binary phase diagrams were plotted. The extraction results as a function of wt% of the surfactant and temperature are expressed by: percentage of solute extracted, E%, residual concentrations of solute and surfactant in the dilute phase (X s,w and X t,w respectively) and volume fraction of coacervate at equilibrium (Фc). For each parameter, whose values are determined by a design of experiments, these results are subjected to empirical smoothing in three dimensionsusing response surface methodology (RSM). The aim of this study is to find out the best compromise between E % and Фc. Under optimal conditions, the extraction extent of AG-9 reaches 98 % and 96 % using TX-114 and Lutensol AO7, respectively. The effect of Na2SO4 and CTAB addition is also studied. Finally, the possibility of recycling the surfactant is proved.

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通过浊点萃取去除废水中的酸性染料，并通过 pH 值调节再生表面活性剂

摘要本研究涉及用非离子表面活性剂 Lutensol AO7 和 TX-114（易于生物降解）从水溶液中萃取工业染料，即酸性绿 9（AG-9）。绘制了水/表面活性剂二元相图和假二元相图。萃取结果与表面活性剂重量百分比和温度的函数关系用以下参数表示：萃取溶质的百分比（E%）、稀释相中溶质和表面活性剂的残留浓度（分别为 X s,w 和 X t,w）以及平衡时凝聚态的体积分数（Фc）。对于每个参数（其值由实验设计确定），这些结果都通过响应面方法（RSM）进行了三维经验平滑处理。本研究的目的是找出 E % 和 Фc 之间的最佳折中值。在最佳条件下，使用 TX-114 和 Lutensol AO7 对 AG-9 的萃取率分别达到 98 % 和 96 %。此外，还研究了添加 Na2SO4 和 CTAB 的效果。最后，证明了回收表面活性剂的可能性。

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来源期刊

Tenside Surfactants Detergents 工程技术-工程：化工

CiteScore

1.90

自引率

10.00%

发文量

审稿时长

3.8 months

期刊介绍： Tenside Surfactants Detergents offers the most recent results of research and development in all fields of surfactant chemistry, such as: synthesis, analysis, physicochemical properties, new types of surfactants, progress in production processes, application-related problems and environmental behavior. Since 1964 Tenside Surfactants Detergents offers strictly peer-reviewed, high-quality articles by renowned specialists around the world.