Laboratoire Sciences des Matériaux et Environnement, Faculté des Sciences de Sfax, Rte. de Soukra Km 4, 3018 Sfax, Tunisia.
J Hazard Mater. 2009 Dec 15;172(1):152-8. doi: 10.1016/j.jhazmat.2009.06.151. Epub 2009 Jul 4.
This work aims to develop a new mineral porous tubular membrane based on mineral coal fly ash. Finely ground mineral coal powder was calcinated at 700 degrees C for about 3 h. The elaboration of the mesoporous layer was performed by the slip-casting method using a suspension made of the mixture of fly-ash powder, water and polyvinyl alcohol (PVA). The obtained membrane was submitted to a thermal treatment which consists in drying at room temperature for 24 h then a sintering at 800 degrees C. SEM photographs indicated that the membrane surface was homogeneous and did not present any macrodefects (cracks, etc...). The average pore diameter of the active layer was 0.25 microm and the thickness was around 20 microm. The membrane permeability was 475 l/h m(2) bar. This membrane was applied to the treatment of the dying effluents generated by the washing baths in the textile industry. The performances in term of permeate flux and efficiency were determined and compared to those obtained using a commercial alumina microfiltration membrane. Almost the same stabilised permeate flux was obtained (about 100 l h(-1)m(-2)). The quality of permeate was almost the same with the two membranes: the COD and color removal was 75% and 90% respectively.
本工作旨在开发一种新型的基于矿物煤粉煤灰的多孔管状膜。将精细研磨的矿物煤粉在 700°C 下煅烧约 3 小时。介孔层的制备是通过使用由粉煤灰粉末、水和聚乙烯醇（PVA）的混合物制成的悬浮液进行注浆法来完成的。所得膜进行了热处理，包括在室温下干燥 24 小时，然后在 800°C 下烧结。SEM 照片表明，膜表面均匀，没有任何宏观缺陷（裂缝等）。活性层的平均孔径为 0.25 微米，厚度约为 20 微米。膜的渗透率为 475 l/h m(2) bar。该膜应用于处理纺织工业洗涤浴产生的染色废水。测定了透过通量和效率方面的性能，并与使用商业氧化铝微滤膜获得的性能进行了比较。几乎获得了相同的稳定透过通量（约 100 l h(-1)m(-2)）。两种膜的透过液质量几乎相同：COD 和颜色去除率分别为 75%和 90%。
