Abdulsalam Mohammed, Che Man Hasfalina, Goh Pei Sean, Yunos Khairul Faezah, Zainal Abidin Zurina, Isma M I Aida, Ismail Ahmad Fauzi
Department of Biological and Agricultural Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia.
Department of Agricultural and Bioresources, Ahmadu Bello University, Zaria 810107, Nigeria.
Polymers (Basel). 2020 Mar 3;12(3):549. doi: 10.3390/polym12030549.
This study focused on developing a hydrophilic hybrid polyvinylidene fluoride (PVDF)-polyethylene glycol (PEG) hollow membrane by incorporating Nano-magnesium oxide (NMO) as a potent antifouling mediator. The Nano-hybrid hollow fibers with varied loading of NMO (0 g; 0.25 g; 0.50 g; 0.75 g and 1.25 g) were spun through phase inversion technique. The resultants Nano-hybrid fibers were characterized and compared based on SEM, EDX, contact angle, surface zeta-potential, permeability flux, fouling resistance and color rejection from palm oil mill effluent (POME). Noticeably, the permeability flux, fouling resistance and color rejection improved with the increase in NMO loading. PVDF-PEG with 0.50 g-NMO loading displayed an outstanding performance with 198.35 L/m·h, 61.33 L/m·h and 74.65% of water flux, POME flux and color rejection from POME, respectively. More so, a remarkable fouling resistance were obtained such that the flux recovery, reversible fouling percentage and irreversible fouling percentage remains relatively steady at 90.98%, 61.39% and 7.68%, respectively, even after 3 cycles of continuous filtrations for a total period of 9 h. However, at excess loading of 0.75 and 1.25 g-NMO, deterioration in the flux and fouling resistance was observed. This was due to the agglomeration of nanoparticles within the matrix structure at the excessive loading.
本研究聚焦于通过掺入纳米氧化镁（NMO）作为一种有效的抗污染介质来制备亲水性聚偏氟乙烯（PVDF）-聚乙二醇（PEG）混合中空纤维膜。采用相转化技术纺制了不同NMO负载量（0 g；0.25 g；0.50 g；0.75 g和1.25 g）的纳米混合中空纤维。基于扫描电子显微镜（SEM）、能谱仪（EDX）、接触角、表面zeta电位、渗透通量、抗污染性能以及对棕榈油厂废水（POME）的脱色率，对所得纳米混合纤维进行了表征和比较。值得注意的是，随着NMO负载量的增加，渗透通量、抗污染性能和脱色率均有所提高。负载0.50 g NMO的PVDF-PEG表现出优异的性能，水通量、POME通量和对POME的脱色率分别为198.35 L/m·h、61.33 L/m·h和74.65%。此外，还获得了显著的抗污染性能，即使在连续过滤3个周期、总时长为9小时后，通量恢复率、可逆污染百分比和不可逆污染百分比分别保持在相对稳定的90.98%、61.39%和7.68%。然而，当NMO负载量过高达到0.75 g和1.25 g时，观察到通量和抗污染性能出现恶化。这是由于在过高负载下纳米颗粒在基体结构内发生了团聚。
