Abstract Recent research has focused on the synthesis and application of filtration sieves which facilitate fast solute separation during processes of desalination and wastewater treatment. This study reports a simple method for fabrication of Graphene oxide (GO) – nanobentonite (NB) filtration sieves with polyethylene glycol (PEG) interlinkage for efficient removal of mixed cationic dyes and electrolytes from their aqueous solutions. The GO-PEG-NB sieves were characterized for morphology, structural stability and vacuum filtration performance. Insertion of PEG linked NB particles between GO sheets was found to increase capillary size of the former and resist intercalation effects of cations present in effluent. Vacuum filtration processes carried out at moderate pressure (0.7 kg cm− 2) had resulted in simultaneous removal of ~ 99% of 30 mg L− 1 of ternary dyes and 40 g L− 1 of mixed electrolytes with an optimum flux of 5.74 ± 0.62 L m− 2 h− 1. The GO-PEG-NB sieves offered good stability and efficient cation removal and therefore exhibited immense potential for treatment of wide scale real-time wastewaters.

中文翻译：

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用于增强脱盐和染料去除的氧化石墨烯-纳米膨润土复合筛

摘要 最近的研究集中在过滤筛的合成和应用上，这些过滤筛有助于在海水淡化和废水处理过程中快速分离溶质。本研究报告了一种制备氧化石墨烯 (GO)-纳米膨润土 (NB) 过滤筛的简单方法，该过滤筛与聚乙二醇 (PEG) 互连，可有效去除水溶液中的混合阳离子染料和电解质。对 GO-PEG-NB 筛子的形态、结构稳定性和真空过滤性能进行了表征。发现在 GO 片之间插入 PEG 连接的 NB 颗粒会增加前者的毛细管尺寸并抵抗流出物中存在的阳离子的嵌入效应。在中等压力 (0.