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首页> 外文期刊>Journal of water reuse and desalination >Removal of chromium from synthetic wastewater using MFI zeolite membrane supported on inexpensive tubular ceramic substrate
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Removal of chromium from synthetic wastewater using MFI zeolite membrane supported on inexpensive tubular ceramic substrate

机译：使用廉价的管状陶瓷基质支撑的MFI沸石膜去除合成废水中的铬

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摘要

A mordenite framework inverted (MFI) type zeolite membrane was produced on inexpensive tubular ceramic substrate through hydrothermal synthesis and applied for the removal of chromium from synthetic wastewater. The fabricated ceramic substrate and membrane was characterized by diverse standard techniques such as X-ray diffraction, field emission scanning electron microscope, porosity, water permeability and pore size measurements. The porosity of the ceramic substrate (53%) was reduced by the deposition of MFI (51%) zeolite layer. The pore size and water permeability of the membrane was evaluated as 0.272 μm and 4.43 × 10–7 m3/m2s.kPa, respectively, which are lower than that of the substrate pore size (0.309 μm) and water permeability (5.93 × 10–7 m3/m2s.kPa) values. To identify the effectiveness of the prepared membrane, the applied pressure of the filtration process and initial chromium concentration and cross flow rate were varied to study their influence on the permeate flux and percentage of removal. The maximum removal of chromium achieved was 78% under an applied pressure of 345 kPa and an initial feed concentration of 1,000 ppm. Finally, the efficiency of the membrane for chromium removal was assessed with other membranes reported in the literature.
机译：通过水热合成法在廉价的管状陶瓷基板上生产出丝光沸石骨架倒置（MFI）型沸石膜，并将其用于去除合成废水中的铬。通过多种标准技术，如X射线衍射，场发射扫描电子显微镜，孔隙率，水渗透性和孔径测量，对制成的陶瓷基材和膜进行了表征。陶瓷基质的孔隙率（53％）通过MFI（51％）沸石层的沉积而降低。膜的孔径和透水性分别为0.272μm和4.43×10–7 m3 / m2s.kPa，低于基质孔径（0.309μm）和透水性（5.93×10–10）。 7 m3 / m2s.kPa）值。为了确定制得的膜的有效性，改变了过滤过程的施加压力，初始铬浓度和错流速率，以研究它们对渗透通量和去除率的影响。在345 kPa的施加压力和1,000 ppm的初始进料浓度下，铬的最大去除率为78％。最后，用文献中报道的其他膜评估了膜去除铬的效率。

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