Abstract

A novel membrane was prepared by modifying cellulose acetate polyethylene glycol (CA/PEG) membrane with Fe³⁺ saturated montmorillonite (Fe³⁺ MMT) by phase inversion process for enhancement of bacterial removal and antibacterial efficiency in water treatment. The pristine and modified membranes were characterized by Fourier Transform Infrared (FTIR) spectroscopy which revealed the characteristic functional groups present in them. SEM image of the modified membrane showed the surface morphological characteristics. The effect of incorporation of Fe³⁺ MMT (1, 2, 3, 4, and 5 (wt %)) in the performance of CA/PEG membranes was evaluated by pure water flux (PWF), bacterial removal efficiency and antibacterial activity. The results show that modified membranes have higher bacterial removal efficiency, antibacterial activity and PWF as compared to pristine membrane. An increase by 46% in bacterial removal and antibacterial activity and 300% in PWF were obtained by modified CA/PEG membrane with 5% addition of Fe³⁺ MMT when compared with pristine membrane. SEM image of the Fe³⁺ MMT modified CA/PEG membrane after treatment showed the presence of trapped distorted bacteria, confirming antibacterial activity. The enhanced antibacterial efficiency reduces biofouling in Fe³⁺ MMT modified CA/PEG membrane thus increasing its effective time of usage in water treatment. The Fe³⁺ MMT CA/PEG membrane therefore provides an economic and effective treatment alternative for water purification. Since 100% efficiency for bacterial removal was not attained in this study, further investigations could be carried out with Fe³⁺ MMT CA/PEG membrane under lower flux rates by controlling the pressure during filtration.

中文翻译：

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Fe3+饱和蒙脱石改性醋酸纤维素聚乙二醇复合膜在水处理中的性能

摘要

^{以Fe 3+}饱和蒙脱土（Fe ³⁺ MMT）为原料，采用相转化法对醋酸纤维素聚乙二醇（CA/PEG）膜进行改性制备了一种新型膜，用于提高水处理中的细菌去除和抗菌效率。原始膜和改性膜通过傅里叶变换红外 (FTIR) 光谱进行表征，揭示了其中存在的特征官能团。改性膜的 SEM 图像显示了表面形态特征。Fe ^{3+的掺入效果}通过纯水通量 (PWF)、细菌去除效率和抗菌活性评估 MMT (1, 2, 3, 4 和 5 (wt %)) 在 CA/PEG 膜的性能。结果表明，与原始膜相比，改性膜具有更高的细菌去除效率、抗菌活性和 PWF。^{与原始膜相比，添加 5% Fe 3+} MMT的改性 CA/PEG 膜的细菌去除和抗菌活性提高了 46%，PWF 提高了 300% 。Fe ³⁺ MMT 改性CA/PEG 膜处理后的SEM 图像显示存在捕获的扭曲细菌，证实了抗菌活性。增强的抗菌效率减少了 Fe ^{3+中的生物污垢}MMT 改性 CA/PEG 膜从而增加了其在水处理中的有效使用时间。因此，Fe ³⁺ MMT CA/PEG 膜为水净化提供了一种经济有效的处理方法。由于在本研究中没有达到 100% 的细菌去除效率，因此可以通过控制过滤过程中的压力在较低的通量率下对 Fe ^{3+ MMT CA/PEG 膜进行进一步的研究。}