Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling Performance
Electro-conductive membranes coupled with a low-voltage electric field can enhance pollutant removal and mitigate membrane fouling, demonstrating significant potential for electrified wastewater treatment. However, efficient fabrication of conductive membranes poses challenges. An in situ oxidative...
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MDPI AG
2024-12-01
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| author | Jinzhuo Shi Yisong Hu Songhua Li Wenqian Xiao Yuan Yang Jiayuan Ji |
| author_facet | Jinzhuo Shi Yisong Hu Songhua Li Wenqian Xiao Yuan Yang Jiayuan Ji |
| author_sort | Jinzhuo Shi |
| collection | DOAJ |
| description | Electro-conductive membranes coupled with a low-voltage electric field can enhance pollutant removal and mitigate membrane fouling, demonstrating significant potential for electrified wastewater treatment. However, efficient fabrication of conductive membranes poses challenges. An in situ oxidative polymerization approach was applied to prepare PVDF-based conductive membranes (PVDF-CMs) and response surface methodology (RSM) was adopted to optimize modification conditions enhancing membrane performance. The anti-fouling property of the conductive membranes was analyzed using model pollutants. The results indicate that when the concentrations of the pyrrole, BVIMBF<sub>4</sub>, and FeCl<sub>3</sub>·6H<sub>2</sub>O are 0.9 mol/L, 4.8 mmol, and 0.8 mol/L, respectively, the electrical resistance of the PVDF-CM is 93 Ω/sq with the water contact angle of 31°, demonstrating good conductivity and hydrophilicity. Batch membrane filtration experiments coupled with negative voltage indicated that when an external voltage of 2.0 V is applied, membrane fouling rates for the conductive membrane filtering BSA and SA solutions are reduced by 17.7% and 17.2%, respectively, compared to the control (0 V). When an external voltage of 0.5 V is applied, the membrane fouling rate for the conductive membrane filtering HA solution is reduced by 72.6%. This study provides a valuable reference for the efficient preparation of conductive membranes for cost-effective wastewater treatment. |
| format | Article |
| id | doaj-art-9642b6f5a06b4bbab0ba6b6f24b334e6 |
| institution | Kabale University |
| issn | 2077-0375 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Membranes |
| spelling | doaj-art-9642b6f5a06b4bbab0ba6b6f24b334e62025-01-24T13:40:57ZengMDPI AGMembranes2077-03752024-12-01151110.3390/membranes15010001Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling PerformanceJinzhuo Shi0Yisong Hu1Songhua Li2Wenqian Xiao3Yuan Yang4Jiayuan Ji5Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaShaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaShaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaShaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaShaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaInstitute for Future Initiatives, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, JapanElectro-conductive membranes coupled with a low-voltage electric field can enhance pollutant removal and mitigate membrane fouling, demonstrating significant potential for electrified wastewater treatment. However, efficient fabrication of conductive membranes poses challenges. An in situ oxidative polymerization approach was applied to prepare PVDF-based conductive membranes (PVDF-CMs) and response surface methodology (RSM) was adopted to optimize modification conditions enhancing membrane performance. The anti-fouling property of the conductive membranes was analyzed using model pollutants. The results indicate that when the concentrations of the pyrrole, BVIMBF<sub>4</sub>, and FeCl<sub>3</sub>·6H<sub>2</sub>O are 0.9 mol/L, 4.8 mmol, and 0.8 mol/L, respectively, the electrical resistance of the PVDF-CM is 93 Ω/sq with the water contact angle of 31°, demonstrating good conductivity and hydrophilicity. Batch membrane filtration experiments coupled with negative voltage indicated that when an external voltage of 2.0 V is applied, membrane fouling rates for the conductive membrane filtering BSA and SA solutions are reduced by 17.7% and 17.2%, respectively, compared to the control (0 V). When an external voltage of 0.5 V is applied, the membrane fouling rate for the conductive membrane filtering HA solution is reduced by 72.6%. This study provides a valuable reference for the efficient preparation of conductive membranes for cost-effective wastewater treatment.https://www.mdpi.com/2077-0375/15/1/1membrane bioreactorresponse surface methodologyin situ oxidative polymerizationpolypyrroleantifouling |
| spellingShingle | Jinzhuo Shi Yisong Hu Songhua Li Wenqian Xiao Yuan Yang Jiayuan Ji Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling Performance Membranes membrane bioreactor response surface methodology in situ oxidative polymerization polypyrrole antifouling |
| title | Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling Performance |
| title_full | Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling Performance |
| title_fullStr | Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling Performance |
| title_full_unstemmed | Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling Performance |
| title_short | Electro-Conductive Modification of Polyvinylidene Fluoride Membrane for Electrified Wastewater Treatment: Optimization and Antifouling Performance |
| title_sort | electro conductive modification of polyvinylidene fluoride membrane for electrified wastewater treatment optimization and antifouling performance |
| topic | membrane bioreactor response surface methodology in situ oxidative polymerization polypyrrole antifouling |
| url | https://www.mdpi.com/2077-0375/15/1/1 |
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