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Preparation and Characterization of Ceramic Microfiltration Membrane using Red Mud as cost effective resource

机译:以红色泥为高性价比资源的陶瓷微滤膜的制备与表征

摘要

This work highlights the fabrication of ceramic microfiltration membranes using Red mud as the raw material. The raw material was pre-processed and paste casting method was used for fabrication. Two different membranes were successfully fabricated: membrane A and membrane B. Membrane A had a regular stoichiometric composition of red mud and binding agents whereas in case of membrane B, a significant percentage of kaolin was added to prop up the membrane matrix. After initial treatments, both the membranes were sintered at high temperatures e.g. 800 and 900oC respectively. Comprehensive material characterization techniques viz. scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), BET surface area analysis, Thermogravimetric analysis (TGA) and Mercury intrusion porosimetry were followed to ascertain the nature of the membrane fabrication and their inherent material properties. The membranes A and B being sintered at 900oC, reported an average pore size of 10 and 6µm respectively. These membranes were found well suited for oil-water emulsion and clarifying raw sugar cane juice studies. A maximum rejection of 53% was achieved with membrane B in oil-water emulsion studies. In sugar cane juice study as well, membrane B performed superior to its counterpart. The performance was reasonably well and membrane B reported 78% of turbidity and 28% of colour removal. In addition to that purity percentage was increased to 1.7 units. All the membranes were studied for their regeneration and reusability. The role of organic solvents was found to be important along with hot water wash. A detailed cost analysis was also performed and it was seen that the membranes fabricated were much cheaper than the similar products reported in literature.
机译:这项工作着重介绍了以赤泥为原料制造陶瓷微滤膜的方法。原材料经过预处理,并采用糊铸法进行制造。成功地制造了两种不同的膜:膜A和膜B。膜A具有规则的化学计量的赤泥和粘合剂化学组成,而在膜B的情况下,添加了大量的高岭土以支撑膜基质。初始处理后,将两个膜在高温例如20℃下烧结。分别为800oC和900oC。全面的材料表征技术,即。扫描电子显微镜(SEM),粉末X射线衍射(PXRD),BET表面积分析,热重分析(TGA)和水银压入孔隙率法都可以确定膜制造的性质及其固有的材料性能。膜A和B在900oC烧结,平均孔径分别为10和6μm。发现这些膜非常适合用于油水乳液和澄清原糖甘蔗汁的研究。在油水乳状液研究中,膜B的最大排斥率为53%。在甘蔗汁研究中,膜B的表现也优于其同类产品。性能相当好,膜B的浊度为78%,脱色率为28%。除此之外,纯度百分比增加到1.7个单位。研究了所有膜的再生和可重复使用性。发现有机溶剂的作用与热水洗涤一起很重要。还进行了详细的成本分析,发现制造的膜比文献中报道的类似产品便宜得多。

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    Parma Sandeep;

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  • 年度 2013
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