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首页> 外文期刊>Journal of Environmental Management >Untapped potentials of acrylonitrile-butadiene-styrene/polyurethane(ABS/PU) blend membrane to purify dye wastewater
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Untapped potentials of acrylonitrile-butadiene-styrene/polyurethane(ABS/PU) blend membrane to purify dye wastewater

机译：丙烯腈-丁二烯-苯乙烯/聚氨酯（ABS / PU）共混膜净化染料废水的潜力尚未开发

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Production of acrylonitrile-butadiene-styrene/polyurethane (ABS/PU) blend membrane with high rejection efficiency for disperse and vat dyes, is introduced as a facile and cost effective technique to purify textile wastewater. In this respect, membranes are produced using commercially available polymers, i.e. ABS and PU, with different compositions (ABS/PU: 100/0, 80/20, 70/30, 60/40 and 50/50 w/w) through wet casting. Casting solutions with concentration of 30 wt% are prepared using two different solvents, i.e. dimethylformamide (DMF) and N-methyl-2- pyrrolidone (NMP). The prepared membranes are characterized using a variety of analytical techniques including SEM imaging, FTIR spectroscopy, dry and wet gas permeation, evaluation of reusability, antifouling and mechanical properties, photostability, surface hydrophilicity and pure water permeability (PWP) of the produced membranes. According to the results, irrespective of solvent type, ABS/PU membranes with higher PU content have lower porosity and smaller pore size both of which contribute to enhanced dye rejection efficiency. This is while the impact of PU content on the photostability of ABS/PU membranes was found to be negligible. Additionally, the produced ABS/PU membranes exhibit good reusability and antifouling properties. However, the mechanical properties of ABS/PU membranes with higher PU contents are inferior to those with lower PU contents. This contrast highlights the prominence of optimum PU content to make a trade-off between dye rejection efficiency and mechanical properties. In this regard, ABS/PU (60/40 w/w) membrane is recognized as the one with optimum composition. Furthermore, it was found that regardless of PU content, membranes cast from DMF-based solutions exhibit superior rejection performance over those cast from NMP-based solutions. Overall, one can witness that employing ABS/PU membranes provides a meritorious and clean approach to refine disperse and vat dye wastewaters, a great threat to the environment and human health.
机译：引进一种对分散染料和还原染料具有高截留效率的丙烯腈-丁二烯-苯乙烯/聚氨酯（ABS / PU）共混膜的生产方法，是一种净化纺织废水的便捷且经济高效的技术。在这方面，使用具有不同组成（ABS / PU：100 / 0、80 / 20、70 / 30、60 / 40和50/50 w / w）的市售聚合物，即ABS和PU，生产膜铸件。使用两种不同的溶剂，即二甲基甲酰胺（DMF）和N-甲基-2-吡咯烷酮（NMP），制备浓度为30 wt％的浇铸溶液。使用多种分析技术对制得的膜进行表征，这些技术包括SEM成像，FTIR光谱，干，湿气体渗透，评估可重复使用性，防污和机械性能，光稳定性，表面亲水性和纯水渗透性（PWP）。根据结果​​，不管溶剂类型如何，具有较高PU含量的ABS / PU膜具有较低的孔隙率和较小的孔径，这两者均有助于提高染料排斥效率。与此相对，发现PU含量对ABS / PU膜的光稳定性的影响可以忽略。另外，生产的ABS / PU膜表现出良好的可重复使用性和防污性能。然而，具有较高PU含量的ABS / PU膜的机械性能不如具有较低PU含量的那些。这种对比突出显示了最佳PU含量的突出之处，以在染料去除效率和机械性能之间进行权衡。在这方面，ABS / PU（60/40 w / w）膜被认为是具有最佳成分的膜。此外，已经发现，不管PU含量如何，基于DMF的溶液流延的膜表现出比基于NMP的溶液流延的膜优异的排斥性能。总体而言，可以看到使用ABS / PU膜提供了一种精练的清洁干燥分散染料和还原染料废水的方法，对环境和人类健康构成了巨大威胁。

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