Abstract

The presence of notable quantities of oil in water is one of the prime causes of water pollution worldwide. The increased water pollution is creating nuisance to human and animal lives. To put an end to this threat, the treatment of oily wastewater is attracting everyone’s attention. The high efficacy of membrane filtration in separation operations makes researchers consider this technology for use in oily wastewater treatment. Hence, keeping this perspective in mind, tubular configuration membranes were fabricated using kaolin (30 wt %), quartz (30 wt %), calcium carbonate (28 wt %), boric acid (4 wt %) and feldspar (8 wt %). Membrane fabricated with this composition is found to possess a porosity value of 59.27 ± 1.002% and mechanical strength of 14.708 ± 2.603 MPa along with an average pore size of 0.092 μm. The surface of the membrane is smooth and free of any defects as observed under field emission scanning electron microscope. The membrane, due to its satisfactory physical and mechanical properties, is further used for the treatment of oily wastewater with three various concentrations and complete rejection of oil is achieved for all the concentrations. The successful separation of oil from the oily wastewater signifies size exclusion to be the dominant phenomenon for the rejection performance of the membrane. The droplet size distribution of the oil-in-water emulsion using laser particle size analyzer also reveals the same, with an average droplet size of oil lying between 2.884–3.802 μm for all three concentrations. The size of the droplets is far bigger than the average pore diameter of the membrane, which ultimately helps the membrane in retaining the oil content of wastewater. Therefore, looking at the outstanding oil removal efficiency of the membrane, it can be concluded that the membrane can be used industrially for the treatment of oily wastewater.

中文翻译：

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用于含油废水微滤的低成本管状陶瓷膜的制备与表征

摘要

水中存在大量石油是全球水污染的主要原因之一。日益严重的水污染正在对人类和动物的生活造成滋扰。为了结束这种威胁，含油废水的处理正引起大家的关注。膜过滤在分离操作中的高效性使研究人员考虑将该技术用于含油废水处理。因此，牢记这一观点，使用高岭土（30 wt%）、石英（30 wt%）、碳酸钙（28 wt%）、硼酸（4 wt%）和长石（8 wt%）制造管状结构膜. 发现用这种组合物制造的膜具有 59.27 ± 1.002% 的孔隙率值和 14.708 ± 2.603 MPa 的机械强度以及 0.092 μm 的平均孔径。在场发射扫描电子显微镜下观察，膜表面光滑且没有任何缺陷。该膜由于其良好的物理和机械性能，进一步用于处理三种不同浓度的含油废水，并在所有浓度下实现了完全脱油。从含油废水中成功分离油表明尺寸排阻是膜截留性能的主要现象。使用激光粒度分析仪对水包油乳液的液滴尺寸分布也显示出相同的结果，所有三种浓度的油的平均液滴尺寸都在 2.884-3.802 μm 之间。液滴的大小远大于膜的平均孔径，这最终有助于膜保留废水中的油含量。因此，从膜出色的除油效率来看，可以得出结论，该膜可以在工业上用于含油废水的处理。