Darini Reza, Ahari Hamed, Khosrojerdi Amir, Jannat Behrooz, Babazadeh Hossein
Department of Water Science and Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Sci Rep. 2025 Jan 6;15(1):1007. doi: 10.1038/s41598-024-84335-x.
This study investigated the antimicrobial efficacy of graphene, titanium dioxide nanoparticles (TiO2NPs), and calcium oxide nanoparticles (CaONPs) against various microorganisms in dairy wastewater. The minimum inhibitory concentration (MIC) of graphene was determined to be 41.66 mg/L for Escherichia coli and 33.33 mg/L for Staphylococcus aureus, outperforming TiO2NPs and CaONPs. Additionally, graphene sheets embedded with 2.8% TiO2 (GST2.8) demonstrated superior performance in inhibiting bacterial growth compared to unmodified or other modified graphene sheets. The GST2.8 treatment significantly reduced microbial counts for S. aureus, E. coli, and mold/yeast, with the lowest observed counts being 4.85 CFU/mL, 3.00 CFU/mL, and 4.04 CFU/mL, respectively. These results suggest that graphene-based nanocomposites incorporating TiO2NPs and CaONPs hold promise as effective antimicrobial agents for wastewater treatment applications.
本研究调查了石墨烯、二氧化钛纳米颗粒（TiO₂NPs）和氧化钙纳米颗粒（CaONPs）对乳制品废水中各种微生物的抗菌效果。石墨烯对大肠杆菌的最低抑菌浓度（MIC）测定为41.66毫克/升，对金黄色葡萄球菌为33.33毫克/升，优于TiO₂NPs和CaONPs。此外，嵌入2.8% TiO₂的石墨烯片（GST2.8）与未改性或其他改性的石墨烯片相比，在抑制细菌生长方面表现出卓越性能。GST2.8处理显著降低了金黄色葡萄球菌、大肠杆菌以及霉菌/酵母菌的微生物数量，观察到的最低数量分别为4.85 CFU/毫升、3.00 CFU/毫升和4.04 CFU/毫升。这些结果表明，结合TiO₂NPs和CaONPs的基于石墨烯的纳米复合材料有望成为废水处理应用中的有效抗菌剂。
