混浴中的盐和碱对具有超低水接触角和可调节的表面孔径分布的Pluronic F127 /聚丙烯腈/膨润土(PF127 / PAN /膨润土-)混合聚氯乙烯(PVC)超滤(UF)膜的合成具有以下影响建立了合成膜,并已测试了含油废水的净化性能。UF膜是通过单步相转化技术使用不同的混凝浴制备的,该混浴涉及(i)水,(ii)KCl,(iii)KOH水溶液和(iii)KCl + KOH水溶液,以及混凝作用对膜的形态,结构和性能进行了研究。通过使用包含PF127,PAN和膨润土的浇铸溶液使纯净水通量最大化,可以获得性能最佳的膜。和KOH诱导的KCl盐凝固浴。最佳合成的膜对于净化油田含油废水的性能非常好,并且在滤油率> 97.0%的情况下,渗透通量会显着增加。最佳合成的超滤膜可减少表面孔径分布,并具有极高的表面孔径密度,超低的油附着力和改进的防污性能,可长期保持稳定的渗透通量。使用KOH诱导的KCl-盐凝结浴合成的PVC / PF127 / PAN /膨润土掺合超滤膜已显示出净化油田含油废水的巨大希望,特别是在油浓度低于200 ppm的情况下。排油率> 97.0%时,渗透通量显着增加。最佳合成的超滤膜可减少表面孔径分布,并具有极高的表面孔径密度,超低的油附着力和改进的防污性能,可长期保持稳定的渗透通量。使用KOH诱导的KCl-盐凝结浴合成的PVC / PF127 / PAN /膨润土掺合超滤膜已显示出净化油田含油废水的巨大希望,特别是在油浓度低于200 ppm的情况下。排油率> 97.0%时,渗透通量显着增加。最佳合成的超滤膜可减少表面孔径分布,并具有极高的表面孔径密度,超低的油附着力和改进的防污性能,可长期保持稳定的渗透通量。使用KOH诱导的KCl-盐凝结浴合成的PVC / PF127 / PAN /膨润土掺合超滤膜已显示出净化油田含油废水的巨大希望,特别是在油浓度低于200 ppm的情况下。并保持长期稳定的渗透通量,提高了防污性能。使用KOH诱导的KCl-盐凝结浴合成的PVC / PF127 / PAN /膨润土掺合超滤膜已显示出净化油田含油废水的巨大希望,特别是在油浓度低于200 ppm的情况下。并提高了防污性能,可长期保持稳定的渗透通量。使用KOH诱导的KCl-盐凝结浴合成的PVC / PF127 / PAN /膨润土掺合超滤膜已显示出净化油田含油废水的巨大希望,特别是在油浓度低于200 ppm的情况下。
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Optimal synthesis of high fouling-resistant PVC-based ultrafiltration membranes with tunable surface pore size distribution and ultralow water contact angle for the treatment of oily wastewater
The effects of salt and alkali in coagulation bath for the synthesis of Pluronic F127/polyacrylonitrile/bentonite (PF127/PAN/bentonite-) blended polyvinyl chloride (PVC) ultrafiltration (UF) membrane with ultralow water contact angle and tunable surface pore size distribution have been established and the synthesized membrane has been tested for the purification of oily wastewater. The UF membranes are prepared via a single-step phase inversion technique using different coagulation baths involving (i) water, (ii) KCl, (iii) aqueous KOH solution, and (iii) KCl + aqueous KOH solution, and the effect of coagulation on membrane morphology, structure and performance have been studied. The best performing membrane is obtained by maximizing pure water flux using casting solution involving PF127, PAN and bentonite, and KOH-induced KCl-salt coagulation bath. The optimally synthesized membrane performs very well for the purification of oilfield oily wastewater, and a significant increment in permeate flux is obtained with oil rejection > 97.0%. The optimally synthesized UF membrane results in reduced surface pore size distribution with exceptionally high surface pore density, ultralow oil-adhesion, and improved antifouling performance maintaining with stable permeate flux for a long-time run. The synthesized PVC/PF127/PAN/bentonite-blended UF membranes using KOH-induced KCl-salt coagulation bath have shown great promise for the purification of oilfield oily wastewater, especially with low oil concentration below 200 ppm.