Sustainable nanocellulose reinforced polyethersulfone membranes coated with tetraethyl orthosilicate for separation of phosphoric acid from wastewater

IF 5.7 3区环境科学与生态学 Q1 WATER RESOURCES

Applied Water Science Pub Date : 2025-03-24 DOI:10.1007/s13201-025-02411-7

Nora Yehia Selem, El-Shimaa M. El-Zahed, Heba Abdallah, Samah A. Hawash

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Abstract

Extraction of cellulose nanocrystal (CNC) from agricultural waste is a cost-effective and environmentally beneficial technique. Six nanocomposite membranes were created by combining varying concentrations of CNC and tetraethyl orthosilicate (TEOS) with polyethersulfone (PES) for the higher removal efficiency of phosphoric acid from wastewater. It was found that the M6 (CNCs/PES/TEOS) membrane has a higher separation efficiency of 82.4% and an appropriate water flux of 169.2 (L.mole/h) at a phosphoric acid concentration of 50 ppm. This result indicated that using 1 wt. % CNCs and 1 wt. % TEOS in the polymer mixture enhances the polymeric membrane's mechanical properties and hydrophilic characteristics with a moderate porosity close to 42%. The mechanical test revealed that the M6 membrane, with a strength of 30.8 MPa and an elongation of 45.17%, exhibited good compressible behavior and flexibility. Moreover, it has an optimal antifouling capability, with a flux recovery percentage close to 99%.

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正硅酸四乙酯包覆纳米纤维素增强聚醚砜膜用于废水中磷酸的分离

从农业废弃物中提取纤维素纳米晶（CNC）是一种经济、环保的技术。将不同浓度的CNC和正硅酸四乙酯（TEOS）与聚醚砜（PES）结合制备了6种纳米复合膜，以提高废水中磷酸的去除效率。结果表明，在磷酸浓度为50 ppm时，M6 （CNCs/PES/TEOS）膜的分离效率为82.4%，适宜的水通量为169.2 （l .mol /h）。结果表明，在聚合物混合物中加入1 wt. %的cnc和1 wt. %的TEOS可以提高聚合物膜的力学性能和亲水性，孔隙率接近42%。力学试验结果表明，该膜具有良好的抗压性能和柔韧性，强度为30.8 MPa，伸长率为45.17%。此外，它具有最佳的防污能力，助熔剂回收率接近99%。

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