Graphene oxide-nanobentonite composite sieves for enhanced desalination and dye removal
Graphene oxide-nanobentonite composite sieves for enhanced desalination and dye removal
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DOI：
10.1016/j.desal.2017.06.010
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发表时间：
2019-02-01
期刊：
影响因子：
9.9
通讯作者：
Das, Papita
中科院分区：
文献类型：
--
作者：
Banerjee, Priya;Mukhopadhyay, Arliruddha;Das, Papita
最近的研究集中在过滤筛的合成和应用上，其在脱盐和废水处理过程中促进快速溶质分离。本研究报告了一种简单的方法，用于制造具有聚乙二醇（PEG）互连的氧化石墨烯（GO）-纳米膨润土（NB）过滤筛，以有效去除水溶液中的混合阳离子染料和电解质。对GO-PEG-NB分子筛的形貌、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颗粒增加前者的毛细管尺寸并且抵抗流出物中存在的阳离子的插层效应。在中等压力（0.7 kg cm（-2））下进行的真空过滤过程导致同时去除类似于99%的30 mg L-1的三元染料和40 g L-1的混合电解质，最佳通量为5.74 +/- 0.62 L-1 m（-2）h（-1）。GO-PEG-NB分子筛具有良好的稳定性和有效的阳离子去除能力，因此在大规模实时废水处理方面具有巨大的潜力。
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 similar to 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-1 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.