National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey; Department of Environmental Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.
Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, No. 159, Longpan Road, Nanjing, 210037, Jiangsu, China.
J Environ Manage. 2023 Jan 15;326(Pt B):116758. doi: 10.1016/j.jenvman.2022.116758. Epub 2022 Nov 17.
In this study, performance of braid reinforced hollow fiber membrane containing polyvinylidene fluoride (PVDF) embedded with tungsten trioxide (WO) nanosheets in a membrane bioreactor (MBR) was examined for textile wastewater treatment. The WO nanosheets was synthesized and blended at different concentrations (0.1-0.02 wt%) in casting solutions of the membranes. The WO nanosheets characterized using various tests such as XRD, FTIR, SEM, EDS, dot-mapping, and TEM. Furthermore, the effects of the increased WO nanosheets into the PVDF matrix on the membrane morphology, hydrophilicity, permeability, antifouling, and COD and color removal efficiency was investigated. The addition of 0.1 wt% of the nanosheets reduces the water contact angle from 69.3° to 62.5° while increasing overall porosity from 37.5 to 43.2%. COD and color removal for PVDF/0.10 wt% WO membrane was between 86-89% and 72-76%, respectively. While the TMP of modified WO membranes did not significantly increase due to antimicrobial properties of the WO nanosheets, the TMP of the pure PVDF membrane increase, indicating considerable cake layer fouling. The results of this study showed that modification of PVDF braid reinforced hollow fiber membrane using WO nanosheets is promising membrane for MBR systems.
在这项研究中，考察了在膜生物反应器 (MBR) 中含有聚偏二氟乙烯 (PVDF) 并嵌入氧化钨 (WO) 纳米片的编织增强中空纤维膜在处理纺织废水中的性能。WO 纳米片是通过各种测试（如 XRD、FTIR、SEM、EDS、点映射和 TEM）进行合成和混合的。此外，还研究了增加 WO 纳米片到 PVDF 基体中对膜形态、亲水性、渗透性、抗污染性以及 COD 和颜色去除效率的影响。添加 0.1wt%的纳米片可将水接触角从 69.3°降低至 62.5°，同时总孔隙率从 37.5%增加至 43.2%。PVDF/0.10wt%WO 膜对 COD 和颜色的去除率分别在 86-89%和 72-76%之间。虽然由于 WO 纳米片的抗菌性能，改性 WO 膜的 TMP 没有显著增加，但纯 PVDF 膜的 TMP 增加，表明有相当大的滤饼层污染。这项研究的结果表明，使用 WO 纳米片改性 PVDF 编织增强中空纤维膜是 MBR 系统中很有前途的膜。
