Lawrence Sawunyama, Opeyemi A. Oyewo, Seshibe S. Makgato, Mokgadi F. Bopape, Damian C. Onwudiwe
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引用次数: 0
Abstract
Hybrid wastewater treatment systems offer viable solutions to enhance the removal of complicated contaminants from aqueous system. This innovation has opened new avenues for advanced wastewater treatment processes. Herein, a novel TiO2–ZnO functionalized coal fly ash-based ceramic membrane was fabricated by utilizing a combined pressing and sintering method. The intrinsic properties of the functionalized membranes were characterized and their chemical and physical properties such as chemical stability, mechanical stability, water absorption, and porosity were established. The shape, crystallinity, thermal characteristics, and functional groups present were also determined using SEM, XRD, TGA, and FTIR studies, respectively. The results showed that the ceramic membrane functionalized with 0.5 g of TiO2–ZnO and sintered at 850 °C exhibited the best thermal, and chemical stability, and possessed the required porosity for ultrafiltration applications. Photocatalytic degradation of tetracycline (TC) as a model pollutant was examined and the optimum efficiency of 77% was achieved within 100 min of visible irradiation using the functionalized membrane. Moreso, the functionalized membrane was found to be stable with 73% degradation efficiency after 5 consecutive cycles of reusability study, showing negligible loss of efficiency. The scale-up of photocatalytic ceramic membranes and their utilization in real industrial applications will confirm their robustness.
混合污水处理系统提供了可行的解决方案，以加强从水系统中去除复杂的污染物。这一创新为先进的废水处理工艺开辟了新的途径。本文采用压制和烧结相结合的方法制备了一种新型的TiO2-ZnO功能化煤粉煤灰陶瓷膜。表征了功能化膜的内在性能，确定了功能化膜的化学稳定性、机械稳定性、吸水性和孔隙率等理化性能。通过SEM、XRD、TGA和FTIR研究，分别确定了其形状、结晶度、热特性和官能团。结果表明，用0.5 g TiO2-ZnO功能化并在850℃下烧结的陶瓷膜具有最佳的热稳定性和化学稳定性，并具有超滤应用所需的孔隙率。研究了该功能化膜对四环素（TC）模型污染物的光催化降解效果，在可见光照射100 min内达到77%的最佳降解效率。而且，经过连续5次重复使用研究，发现功能化膜的降解效率稳定，达到73%，效率损失可以忽略不计。光催化陶瓷膜的规模扩大及其在实际工业应用中的应用将证实其稳健性。图形抽象
期刊介绍：
Nanoscale Research Letters (NRL) provides an interdisciplinary forum for communication of scientific and technological advances in the creation and use of objects at the nanometer scale. NRL is the first nanotechnology journal from a major publisher to be published with Open Access.
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