Designing of nanotextured inorganic-organic hybrid PVDF membrane for efficient separation of the oil-in-water emulsions. (December 2022)

• Record Type: Journal Article
• Authors: Baig, Nadeem; Alowaid, Abdulaziz Mohammed; Abdulazeez, Ismail; Salhi, Billel; Sajid, Muhammad; Kammakakam, Irshad
• Is Part Of: Chemosphere. Volume 308:Part 3(2022)
• Publication Date: 2022-12
• Subjects: Separation -- Environment -- Water -- Organic contaminants -- Wastewater -- Antifouling; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.136531
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: The separation of the emulsified oil/water is one of the critical environmental challenges. The PVDF membranes have been found helpful for separation, but rapid fouling makes them less attractive in treating oil-in-water emulsions. The design of antifouling membranes has become an area of deep interest. Herein, developing a novel modified PVDF ultrafiltration membrane was reported by doping the pyrrole and solidifying it in a ferric-containing coagulation bath, resulting in a unique nanotextured PVDF membrane (CCB–Fe/PPnp -PVDF) to separate the oil/water emulsions. The resultant CCB-Fe/PPnp -PVDF membrane was thoroughly characterized using the FTIR, FE-SEM, EDX, mapping, AFM, and contact analyzer. The hydrophilicity of the CCB-Fe/PPnp -PVDF was substantially improved, and the water contact angle was reduced from 81֯ ± 0.9֯ to 44֯ ± 1.7֯. The CCB-Fe/PPnp-PVDF membrane flux increased by 121% compared to the pristine PVDF membrane, with high separation efficiency of 99%. The hydrophilic nanotextured surface of the CCB-Fe/PPnp -PVDF membrane showed good antifouling behavior, with a flux recovery ratio (FRR) of more than 96%. Irreversible flux was just less than 4%. The high flux recovery ratio indicated that the nanotextured surface produced by the Fe/PPnp had prevented the blockage of the membrane pores and compact cake layer formation, which makes it an excellent membrane for oil/water emulsion separation. This strategy can be adopted for designing advanced membranes for separation applications. Graphical abstract: Image 1 Highlights: A nanotextured PVDF membrane is produced by doping and controlling the coagulation bath. The designed PVDF membrane has shown superior hydrophilicity with a WCA of 44֯ ± 1.7֯. The permeation flux increased by 121% compared to virgin PVDF membranes. The modified PVDF membrane has shown excellent rejection, more significant than 99%. The developed PVDF membrane has shown excellent antifouling behavior and FRR greater than 96%.