Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, 518055, China.
Environ Sci Pollut Res Int. 2018 Sep;25(25):25227-25242. doi: 10.1007/s11356-018-2613-y. Epub 2018 Jun 26.
Two hydrophilic poly-vinylidene fluoride (PVDF) ultrafiltration membranes were prepared via in situ embedment of nanoparticles (NP), i.e., TiO and AlO, respectively, and their anti-organic-fouling and anti-biofouling were comprehensively investigated. Characterization of modified PVDF-NP membranes by XRD and FTIR exhibited that nanoparticles were embedded successfully. Series of fast filtration tests demonstrated that in contrary to virgin PVDF membrane, PVDF-NP membranes have high permeability and anti-organic-fouling ability by decreasing the possibility of organic matters deposition and accumulation. Co-existed Ca in feed solution deteriorated the organic fouling in virgin PVDF and PVDF-NP membranes, which was mainly caused by gelation of macromolecular foulants. PVDF-NP membranes were used to form MBR modules for domestic wastewater treatment, and the long-term monitoring evidenced that hydrophilic modified membranes achieved stably high COD and [Formula: see text] rejection efficiencies, and better organic rejection capability than mAO process. PVDF-NP membranes possessed consistently high anti-biofouling ability to maintain stable membrane permeability.
两种亲水性聚偏氟乙烯（PVDF）超滤膜分别通过原位嵌入纳米颗粒（NP），即 TiO 和 AlO 来制备，并对其抗有机污染和抗生物污染进行了综合研究。通过 XRD 和 FTIR 对改性 PVDF-NP 膜的表征表明，纳米颗粒成功嵌入。一系列快速过滤测试表明，与原始 PVDF 膜相反，PVDF-NP 膜具有高渗透性和抗有机污染能力，降低了有机物沉积和积累的可能性。进料溶液中共存的 Ca 会恶化原始 PVDF 和 PVDF-NP 膜中的有机污染，这主要是由高分子污染物的凝胶化引起的。PVDF-NP 膜用于形成用于处理生活污水的 MBR 模块，长期监测表明，亲水改性膜实现了稳定的高 COD 和 [Formula: see text] 去除效率，以及比 mAO 工艺更好的有机去除能力。PVDF-NP 膜具有始终如一的高抗生物污染能力，可保持稳定的膜渗透性。
