Effect of photocatalytic pretreatment on the membrane performance in nanofiltration of textile wastewater

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Korkut, Sevde and Ormanci-Acar, Türkan and Keskin, Basak and Ağtaş, Meltem and Karahan, Özlem and Demir, Tuğba U. and Ünal, Serkan and Menceloğlu, Yusuf Z. and Koyuncu, Ismail (2024) Effect of photocatalytic pretreatment on the membrane performance in nanofiltration of textile wastewater. Water, Air, and Soil Pollution, 235 (5). ISSN 0049-6979 (Print) 1573-2932 (Online)

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Abstract

Traditional methods like biological treatment, flocculation-coagulation, adsorption, and advanced oxidation are commonly employed for textile wastewater treatment, but their sustainability is hindered by issues such as the adverse impact of textile wastewater on microorganisms and the requirement for substantial chemical usage. In response to increasingly stringent legal discharge standards, membrane technologies are emerging as prominent alternatives for effective textile wastewater treatment. The application of photocatalysis as a pretreatment to improve effluent quality and treatment performance has shown effective results in the treatment of textile wastewater by nanofiltration (NF). However, innovative solutions are needed to improve the efficiency of UV photocatalytic reactors. Here, the TiO2/halloysite nanotube (HNT) photocatalyst was shown to completely remove dyes under UV illumination. Two wastewater samples from photocatalytic (PC) pretreatment were treated using innovative NF membranes with different contents. The study examined the impact of PC pretreatment on the flux of wastewater from a textile factory heat recovery tank, which increased from 18.32 to 27.63 L/m2.h. The membranes achieved > 98% removal in COD, while bare membrane achieved 95% removal in conductivity. The addition of s-DADPS as monomer and HNT as nanoparticles to the membranes with different compositions affected the cross-linking in the TFC layer. During the tests conducted on the water extracted from the dyeing tank, the color was completely eliminated without any loss of flux. Additionally, improvements in COD removal were observed.
Item Type: Article
Uncontrolled Keywords: Nanocomposite membranes; Nanofiltration; Photocatalysis; Wastewater treatment
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Integrated Manufacturing Technologies Research and Application Center
Depositing User: Serkan Ünal
Date Deposited: 10 Jun 2024 13:53
Last Modified: 10 Jun 2024 13:53
URI: https://research.sabanciuniv.edu/id/eprint/49344

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