Erragued Rim, Sharma Manorma, Gando-Ferreira Licínio M, Bouaziz Mohamed
Laboratory of Electrochemistry and Environment, National School of Engineers of Sfax, University of Sfax, BP 1173, Sfax 3038, Tunisia.
Department of Chemical Engineering, University of Coimbra, CIEPQPF, Rua Sílvio Lima, Pólo II-Pinhal de Marrocos, Coimbra 3030-790, Portugal.
ACS Omega. 2024 Jan 16;9(4):4762-4774. doi: 10.1021/acsomega.3c08225. eCollection 2024 Jan 30.
This study explores the integration of zinc oxide coated with polyaniline (ZnO-PANI) nanoparticles into a poly(ether sulfone) (PES) matrix to concurrently enhance permeate flux and oleuropein (OLP) rejection during the filtration of olive leaf extract (OLE). The effect of ZnO-PANI content on porosity, pore size, surface hydrophilicity, and pure water flux (PWF) was studied. The results indicate that an increase in ZnO-PANI content (0-0.2%) leads to a 3-fold increase in mean pore size, permeability (1.29-7.18 L/m h bar), porosity (72.2-77.8%), and improved surface hydrophilicity of the prepared membranes. Membrane performance was tested for OLE permeate flux of the OLE and total phenolic compounds (TPC) rejection at various pressures (10-30 bar), the performance of the OLP rejection at 30 bar, and fouling resistance. The 0.2 wt % ZnO-PANI membrane exhibits the highest permeate flux, while the 0.4 wt % ZnO-PANI membrane offers the highest rejection values (90-97% for TPC and 100% for OLP). Bare PES demonstrated the best fouling resistance. Strategic ZnO-PANI incorporation achieves a balance, enhancing both the flux and rejection efficiency. The 0.2 wt % ZnO-PANI membrane emerges as particularly favorable, striking a beneficial equilibrium between permeate flux and OLP rejection. Intriguingly, the use of these membranes for OLE filtration, postpretreatment with ultrafiltration (UF), results in a remarkable 100% rejection of OLP. This discovery underscores the significant and specific separation of OLP from OLE facilitated by a ZnO-PANI-based mixed matrix membrane (MMM). The study contributes valuable insights into the development of advanced membranes with enhanced filtration capabilities for high-added value phenolic compound separation.
本研究探索将聚苯胺包覆的氧化锌（ZnO-PANI）纳米颗粒整合到聚醚砜（PES）基质中，以在过滤橄榄叶提取物（OLE）过程中同时提高渗透通量和橄榄苦苷（OLP）截留率。研究了ZnO-PANI含量对孔隙率、孔径、表面亲水性和纯水通量（PWF）的影响。结果表明，ZnO-PANI含量增加（0-0.2%）会导致平均孔径增大3倍，渗透率（1.29-7.18 L/m h bar）、孔隙率（72.2-77.8%）提高，且制备的膜表面亲水性得到改善。在不同压力（10-30 bar）下测试了膜对OLE的渗透通量、总酚类化合物（TPC）截留率、30 bar下OLP截留率的性能以及抗污染性能。0.2 wt% ZnO-PANI膜表现出最高的渗透通量，而0.4 wt% ZnO-PANI膜具有最高的截留率（TPC为90-97%，OLP为100%）。纯PES膜表现出最佳的抗污染性能。战略性地引入ZnO-PANI实现了一种平衡，提高了通量和截留效率。0.2 wt% ZnO-PANI膜显得尤为有利，在渗透通量和OLP截留率之间达到了有益的平衡。有趣的是，使用这些膜进行OLE过滤，经超滤（UF）预处理后，OLP截留率可达显著的100%。这一发现强调了基于ZnO-PANI的混合基质膜（MMM）对OLP与OLE的显著且特异性分离。该研究为开发具有增强过滤能力以分离高附加值酚类化合物的先进膜提供了有价值的见解。
