Highly effective ultrafiltration membranes based on plastic waste for dye removal from water.

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Eman S Mansor, Heba Abdallah, A M Shaban
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引用次数: 0

Abstract

Applicable and low-cost ultrafiltration membranes based on waste polystyrene (WPS) blend and poly vinylidene fluoride (PVDF) were effectively cast on nonwoven support using phase inversion method. Analysis was done into how the WPS ratio affected the morphology and antifouling performance of the fabricated membranes. Cross flow filtration of pure water and various types of polluted aqueous solutions as the feed was used to assess the performance of the membranes. The morphology analysis shows that the WPS/PVDF membrane layer has completely changed from a spongy structure to a finger-like structure. In addition, the modified membrane with 50% WPS demonstrated that the trade-off between selectivity and permeability is met by a significant improvement in the rejection of the membrane with a reduction in permeate flux due to the addition of PVDF. With a water permeability of 50 LMH and 44 LMH, respectively, the optimized WPS-PVDF membrane with 50% WPS could reject 81% and 74% of Congo red dye (CR) and methylene blue dye (MB), respectively. The flux recovery ratio (FRR) reached to 88.2% by increasing PVDF concentration with 50% wt. Also, this membrane has the lowest irreversible fouling (Rir) value of 11.7% and lowest reversible fouling (Rr) value of 27.9%. The percent of cleaning efficiency reach to 71%, 90%, and 85% after eight cycles of humic acid (HA), CR, and MB filtration, respectively, for the modified PS-PVDF (50%-50%). However, higher PVDF values cause the membrane's pores to become clogged, increase the irreversible fouling, and decrease the cleaning efficiency. In addition to providing promising filtration results, the modified membrane is inexpensive because it was made from waste polystyrene, and as a result, it could be scaled up to treat colored wastewater produced by textile industries. PRACTITIONER POINTS: Recycling of plastic waste as an UF membrane for water/wastewater treatment was successfully prepared and investigated. Mechanical properties showed reasonable response with adding PVDF. The modified membrane with 50% PS demonstrated that the trade-off between selectivity and permeability is met by a significant improvement in the rejection.

基于塑料废料的高效超滤膜,用于去除水中的染料。
利用相位反转法在无纺布支撑物上有效浇铸了基于废聚苯乙烯(WPS)混合物和聚偏二氟乙烯(PVDF)的适用且低成本的超滤膜。分析了 WPS 比率如何影响制成膜的形态和防污性能。以纯水和各种污染水溶液为进料进行交叉流过滤,以评估膜的性能。形态分析表明,WPS/PVDF 膜层已从海绵状结构完全变为指状结构。此外,含有 50% WPS 的改良膜表明,在选择性和渗透性之间进行权衡时,由于添加了 PVDF,膜的排斥性显著提高,而渗透通量却有所降低。在水渗透率分别为 50 LMH 和 44 LMH 的情况下,含有 50% WPS 的优化 WPS-PVDF 膜可分别剔除 81% 和 74% 的刚果红染料(CR)和亚甲基蓝染料(MB)。随着 PVDF 浓度(50% WPS)的增加,通量回收率(FRR)达到 88.2%。此外,这种膜的不可逆污垢(Rir)值最低,为 11.7%,可逆污垢(Rr)值最低,为 27.9%。改性 PS-PVDF(50%-50%)在腐植酸(HA)、CR 和 MB 过滤八个周期后,清洁效率分别达到 71%、90% 和 85%。然而,较高的 PVDF 值会导致膜孔堵塞,增加不可逆污垢,降低清洁效率。改性膜除了具有良好的过滤效果外,还因为是用废旧聚苯乙烯制成的而价格低廉,因此可以扩大规模来处理纺织业产生的有色废水。实践点:成功制备并研究了回收利用塑料废料作为超滤膜处理水/废水的方法。加入 PVDF 后,机械性能显示出合理的响应。含有 50% PS 的改性膜表明,在选择性和渗透性之间进行权衡后,可显著改善排斥效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Water Environment Research
Water Environment Research 环境科学-工程:环境
CiteScore
6.30
自引率
0.00%
发文量
138
审稿时长
11 months
期刊介绍: Published since 1928, Water Environment Research (WER) is an international multidisciplinary water resource management journal for the dissemination of fundamental and applied research in all scientific and technical areas related to water quality and resource recovery. WER''s goal is to foster communication and interdisciplinary research between water sciences and related fields such as environmental toxicology, agriculture, public and occupational health, microbiology, and ecology. In addition to original research articles, short communications, case studies, reviews, and perspectives are encouraged.
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