期刊
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
卷 148, 期 -, 页码 813-824出版社
ELSEVIER
DOI: 10.1016/j.psep.2021.02.002
关键词
PDA coated ZnFe(2)O(4)nanocomposites; PES hybrid membranes; HA removal; oil/water emulsion separation; AntiFoulinga
资金
- Center for Membranes and Advanced Water Technology (CMAT) at Khalifa University of Science and Technologyin Abu Dhabi (UAE) [RC2-2018-009]
This study investigated the impact of PDA-coated ZnFe2O4 nanocomposites on the fabrication of hybrid UF membranes. The incorporation of PDA@ZnFe2O4NCs into PES membranes improved porosity, pore radius, and hydrophilicity. The hybrid membranes showed enhanced performance in terms of water flux and removal efficiency of pollutants like humic acid and oil, making them promising for wastewater treatment applications.
This study explored the impact of eco-friendly polydopamine (PDA) coated ZnFe2O4 nanocomposites (PDA@ZnFe2O4NCs) as nanofillers to fabricate a new class of polyethersulfone (PES) hybrid ultrafiltration (UF) membranes for wastewater treatment applications. The hybrid UF membrane was prepared by incorporating PDA@ZnFe2O4NCs into PES via the non-solvent induced phase separation (NIPS) process. The PDA@ZnFe2O4NC was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Additionally, the morphology and performance of the prepared hybrid membranes were characterized by SEM, contact angle, surface charge, and thermogravimetric analysis (TGA). The incorporation of PDA@ZnFe2O4NC into the PES membrane affects the porosity, mean pore radius, hydrophilicity, and thermal stability of the developed hybrid membranes. The pure water flux of the PES hybrid membrane with 4 wt% PDA@ZnFe2O4 reached similar to 687 L/m(2)h, which is about 188% higher than that of the pristine PES membrane. The performance of the PES/PDA@ZnFe2O4 ultrafiltration hybrid membrane was also investigated using humic acid (HA) foulant and oil/water emulsion individually. Compared to the pristine PES and PES/ZnFe2O4 membranes, the developed hybrid membranes showed enhanced permeability and HA foulant removal. HA's removal efficiency has improved from similar to 65% in the pristine PES membrane to similar to 94% in the 4 wt% PDA@ZnFe2O4 hybrid membrane. The abundant functional groups on the PDA@ZnFe2O4NC surface also enhanced these paration of the oil/water emulsion (96%). In both the HA and oil/water emulsion separation tests, the flux recovery ratio (FRR) and reversible fouling ratio (Rr) were also significantly improved, suggesting that the PES/PDA@ZnFe2O4 membrane was a very promising candidate for HA removal and treatment of oily wastewater. (C) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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