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

曝气 膜污染 过滤(数学) 结垢 吸附 扫描电子显微镜 化学 化学工程 傅里叶变换红外光谱 材料科学 无机化学 复合材料 有机化学 生物化学 统计 数学 工程类
作者
Güler Türkoğlu Demirkol,Suna Özden Çelik,Sevgi Güneş Durak,Seren Acarer,Ender Çetin,Sultan Akarçay Demir,Neşe Tüfekçi
出处
期刊:Polymers [Multidisciplinary Digital Publishing Institute]
卷期号:13 (19): 3201-3201 被引量:7
标识
DOI:10.3390/polym13193201
摘要

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.
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