Mousa Sahar A, Abdallah Heba, Khairy S A
Physics Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.
Chemical Engineering Department, Engineering and Renewable Energy Research Institute, National Research Centre, 33 El-Bohouth St. (Former El-Tahrir St.), Dokki, PO Box 12622, Giza, Egypt.
Sci Rep. 2025 Jan 15;15(1):2102. doi: 10.1038/s41598-024-85075-8.
The pulp and paper manufacturing wastewater is as complicated as any other industrial effluent. A promising approach to treating water is to combine photocatalysis and membrane processes. This paper demonstrates a novel photocatalytic membrane technique for solar-powered water filtration. The method is based on creating green-prepared TiO, and MnO nanoparticles (NPs) using Pomegranate peels and Seder leaf extracts and incorporation into polyvinylidene chloride to produce a novel water purification system that combines semiconductor photocatalysis with membrane filtration. The prepared heterostructure of the TiO/MnO nanocomposite membrane provides photogenerated charge separation. To ensure chemical bonding at the membrane surface, Raman and Fourier transform infrared spectroscopy (FT-IR) were employed. The modified membrane's hydrophilicity and roughness increased significantly. Additionally, the modified nanocomposite membranes porosity was measured. The integrated process demonstrated much higher removal of humic acid and high efficiency of wastewater treatment for pulp and paper. In sunlight, humic acid removal was 98% from synthetic wastewater. While using the produced membrane on pulp and paper effluent, these studies indicate that: in the dark, the removal was 50%, while in the sunlight, the removal increased to 70%, with a reduction in the COD from 1500 mg/L to 247 mg/L. Additionally, the TDS decreased from 1630 to 452 ppt in the sunlight. This research sheds light on how solar energy can clean wastewater from the pulp and paper industry while improving membrane separation. Also, an alternative source to sunlight was used to manufacture a photocatalytic membrane with high efficiency for wastewater treatment and an inexpensive price.
制浆造纸工业废水与其他任何工业废水一样复杂。一种有前景的水处理方法是将光催化与膜工艺相结合。本文展示了一种用于太阳能水过滤的新型光催化膜技术。该方法基于利用石榴皮和西达叶提取物制备绿色TiO和MnO纳米颗粒（NPs），并将其掺入聚偏二氯乙烯中，以生产一种将半导体光催化与膜过滤相结合的新型水净化系统。制备的TiO/MnO纳米复合膜的异质结构提供了光生电荷分离。为确保膜表面的化学键合，采用了拉曼光谱和傅里叶变换红外光谱（FT-IR）。改性膜的亲水性和粗糙度显著增加。此外，还测量了改性纳米复合膜的孔隙率。该集成工艺对腐殖酸的去除率更高，对制浆造纸废水的处理效率更高。在阳光下，合成废水中腐殖酸的去除率为98%。在制浆造纸废水上使用所制备的膜时，这些研究表明：在黑暗中，去除率为50%，而在阳光下，去除率提高到70%，化学需氧量从1500mg/L降至247mg/L。此外，在阳光下，总溶解固体从1630降至452ppt。这项研究揭示了太阳能如何在改善膜分离的同时净化制浆造纸工业的废水。此外，还使用了阳光的替代来源来制造一种高效且价格低廉的用于废水处理的光催化膜。
