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Polymers
Volume 13
Issue 19
10.3390/polym13193201
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Article

Effects of Fe(OH)3 and MnO2 Flocs on Iron/Manganese Removal and Fouling in Aerated Submerged Membrane Systems

by
Güler Türkoğlu Demirkol
1,*,
Suna Özden Çelik
2,
Sevgi Güneş Durak
3,
Seren Acarer
1,*,
Ender Çetin
1,
Sultan Akarçay Demir
1 and
Neşe Tüfekci
1
1
Department of Environmental Engineering, Faculty of Engineering, Istanbul University-Cerrahpasa, Avcilar Campus, Istanbul 34320, Turkey
2
Department of Environmental Engineering, Corlu Engineering Faculty, Namik Kemal University, Corlu/Tekirdag 59860, Turkey
3
Department of Environmental Engineering, Faculty of Engineering-Architecture, Nevsehir Haci Bektas Veli University, Nevsehir 50300, Turkey
*
Authors to whom correspondence should be addressed.
Polymers 2021, 13(19), 3201; https://doi.org/10.3390/polym13193201
Submission received: 27 July 2021 / Revised: 27 August 2021 / Accepted: 30 August 2021 / Published: 22 September 2021
(This article belongs to the Special Issue Advanced Polymeric Membranes for Wastewater Reclamation and Water Purification)
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Abstract

Many treatment methods are used to remove iron and manganese from water. Aeration and membrane filtration are two of these methods. In this study, Fe2+ and Mn2+ removal by aeration with different catalysts and instead of simple membrane filtration applied in other studies, the aerated-submerged membrane systems were evaluated separately. When Fe(OH)3 was applied in the aeration step and complete oxidation of Fe2+ was obtained after 27 min, while complete Mn2+ oxidation was obtained in 76 min. However, when MnO2 was applied in the aeration step, complete oxidation of Fe2+ and Mn2+ was relatively slow (36 and 110 min, respectively). According to the results obtained from the aerated membrane system, Fe2+ and Mn2+ removal were extended by Fe(OH)3 via adsorption/surface oxidation. It is clearly shown from the flux, resistance results, scanning electron microscope (SEM) and Fourier transform infrared (FT/IR) spectroscopy observation that manganese oxides were deposited mainly in membrane pores forming membrane fouling by small flocs, while iron oxide particles were deposited on the membrane surface. Although the flux performance of PT PES membrane was higher than HF PP membrane, fouling resistance of HF PP membrane was higher than PT PES.
Keywords: Fe2+; Mn2+; removal; membrane; fouling Fe2+; Mn2+; removal; membrane; fouling

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MDPI and ACS Style

Türkoğlu Demirkol, G.; Çelik, S.Ö.; Güneş Durak, S.; Acarer, S.; Çetin, E.; Akarçay Demir, S.; Tüfekci, N. Effects of Fe(OH)3 and MnO2 Flocs on Iron/Manganese Removal and Fouling in Aerated Submerged Membrane Systems. Polymers 2021, 13, 3201. https://doi.org/10.3390/polym13193201

AMA Style

Türkoğlu Demirkol G, Çelik SÖ, Güneş Durak S, Acarer S, Çetin E, Akarçay Demir S, Tüfekci N. Effects of Fe(OH)3 and MnO2 Flocs on Iron/Manganese Removal and Fouling in Aerated Submerged Membrane Systems. Polymers. 2021; 13(19):3201. https://doi.org/10.3390/polym13193201

Chicago/Turabian Style

Türkoğlu Demirkol, Güler, Suna Özden Çelik, Sevgi Güneş Durak, Seren Acarer, Ender Çetin, Sultan Akarçay Demir, and Neşe Tüfekci. 2021. "Effects of Fe(OH)3 and MnO2 Flocs on Iron/Manganese Removal and Fouling in Aerated Submerged Membrane Systems" Polymers 13, no. 19: 3201. https://doi.org/10.3390/polym13193201

APA Style

Türkoğlu Demirkol, G., Çelik, S. Ö., Güneş Durak, S., Acarer, S., Çetin, E., Akarçay Demir, S., & Tüfekci, N. (2021). Effects of Fe(OH)3 and MnO2 Flocs on Iron/Manganese Removal and Fouling in Aerated Submerged Membrane Systems. Polymers, 13(19), 3201. https://doi.org/10.3390/polym13193201

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