دورية أكاديمية
In-Situ H2O2 Cleaning for Fouling Control of Manganese-Doped Ceramic Membrane through Confined Catalytic Oxidation Inside Membrane
| العنوان: | In-Situ H2O2 Cleaning for Fouling Control of Manganese-Doped Ceramic Membrane through Confined Catalytic Oxidation Inside Membrane |
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| المؤلفون: | Shengyin Tang, Wanyi Fu, Tiantian Song, Tianhao Tang, Li Chen, Jianning Guo, Slav W. Hermanowicz, Xihui Zhang |
| المصدر: | Membranes, Vol 12, Iss 1, p 21 (2021) |
| بيانات النشر: | MDPI AG, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Chemical technology LCC:Chemical engineering |
| مصطلحات موضوعية: | manganese-doped ceramic membrane, fouling mitigation, in-situ cleaning, hydrogen peroxide, confined catalytic oxidation, wastewater treatment, Chemical technology, TP1-1185, Chemical engineering, TP155-156 |
| الوصف: | This work presents an effective approach for manganese-doped Al2O3 ceramic membrane (Mn-doped membrane) fouling control by in-situ confined H2O2 cleaning in wastewater treatment. An Mn-doped membrane with 0.7 atomic percent Mn doping in the membrane layer was used in a membrane bioreactor with the aim to improve the catalytic activity toward oxidation of foulants by H2O2. Backwashing with 1 mM H2O2 solution at a flux of 120 L/m2/h (LMH) for 1 min was determined to be the optimal mode for in-situ H2O2 cleaning, with confined H2O2 decomposition inside the membrane. The Mn-doped membrane with in-situ H2O2 cleaning demonstrated much better fouling mitigation efficiency than a pristine Al2O3 ceramic membrane (pristine membrane). With in-situ H2O2 cleaning, the transmembrane pressure increase (ΔTMP) of the Mn-doped membrane was 22.2 kPa after 24-h filtration, which was 40.5% lower than that of the pristine membrane (37.3 kPa). The enhanced fouling mitigation was attributed to Mn doping, in the Mn-doped membrane layer, that improved the membrane surface properties and confined the catalytic oxidation of foulants by H2O2 inside the membrane. Mn3+/Mn4+ redox couples in the Mn-doped membrane catalyzed H2O2 decomposition continuously to generate reactive oxygen species (ROS) (i.e., HO• and O21), which were likely to be confined in membrane pores and efficiently degraded organic foulants. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2077-0375 |
| Relation: | https://www.mdpi.com/2077-0375/12/1/21; https://doaj.org/toc/2077-0375 |
| DOI: | 10.3390/membranes12010021 |
| URL الوصول: | https://doaj.org/article/01bbc4bd6fdc494fbb691d4d0265c2fe |
| رقم الأكسشن: | edsdoj.01bbc4bd6fdc494fbb691d4d0265c2fe |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20770375 |
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| DOI: | 10.3390/membranes12010021 |