Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and Mechanisms
In this study, a complete steric, electrostatic, and dielectric mass transfer model is applied to investigate the separation mechanism of typical antibiotic sulfadiazine by NF90, NF270, VNF-8040 and TMN20H-400 nanofiltration membranes. FTIR and XPS analysis clearly indicate that the membranes we use...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/11/2/104 |
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| author | Haochen Zhu Bo Hu Fengrui Yang |
| author_facet | Haochen Zhu Bo Hu Fengrui Yang |
| author_sort | Haochen Zhu |
| collection | DOAJ |
| description | In this study, a complete steric, electrostatic, and dielectric mass transfer model is applied to investigate the separation mechanism of typical antibiotic sulfadiazine by NF90, NF270, VNF-8040 and TMN20H-400 nanofiltration membranes. FTIR and XPS analysis clearly indicate that the membranes we used possess skin layers containing both amine and carboxylic acid groups that can be distributed in an inhomogeneous fashion, leading to a bipolar fixed charge distribution. We compare the theoretical and experimental rejection rate of the sulfadiazine as a function of the pressure difference across the nanopore for the four polyamide membranes of inhomogeneously charged nanopores. It is shown that the rejection rate of sulfadiazine obtained by the solute transport model has similar qualitative results with that of experiments and follows the sequence: <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mrow><mi>N</mi><mi>F</mi><mn>90</mn></mrow></msub><mo>></mo><msub><mi>R</mi><mrow><mi>V</mi><mi>N</mi><mi>F</mi><mn>2</mn><mo>−</mo><mn>8040</mn></mrow></msub><mo>></mo><msub><mi>R</mi><mrow><mi>N</mi><mi>F</mi><mn>270</mn></mrow></msub><mo>></mo><msub><mi>R</mi><mrow><mi>T</mi><mi>M</mi><mi>N</mi><mn>20</mn><mi>H</mi><mo>−</mo><mn>400</mn></mrow></msub></mrow></semantics></math></inline-formula>. The physical explanation can be attributed to the influence of the inhomogeneous charge distribution on the electric field that arises spontaneously so as to maintain the electroneutrality within the nanopore. |
| first_indexed | 2024-03-09T06:07:37Z |
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| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T06:07:37Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-c72d8efa64094adc99471e062741c28d2023-12-03T12:02:27ZengMDPI AGMembranes2077-03752021-02-0111210410.3390/membranes11020104Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and MechanismsHaochen Zhu0Bo Hu1Fengrui Yang2State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Ministry of Education, 1239 Siping Rd., Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Ministry of Education, 1239 Siping Rd., Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Ministry of Education, 1239 Siping Rd., Shanghai 200092, ChinaIn this study, a complete steric, electrostatic, and dielectric mass transfer model is applied to investigate the separation mechanism of typical antibiotic sulfadiazine by NF90, NF270, VNF-8040 and TMN20H-400 nanofiltration membranes. FTIR and XPS analysis clearly indicate that the membranes we used possess skin layers containing both amine and carboxylic acid groups that can be distributed in an inhomogeneous fashion, leading to a bipolar fixed charge distribution. We compare the theoretical and experimental rejection rate of the sulfadiazine as a function of the pressure difference across the nanopore for the four polyamide membranes of inhomogeneously charged nanopores. It is shown that the rejection rate of sulfadiazine obtained by the solute transport model has similar qualitative results with that of experiments and follows the sequence: <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mrow><mi>N</mi><mi>F</mi><mn>90</mn></mrow></msub><mo>></mo><msub><mi>R</mi><mrow><mi>V</mi><mi>N</mi><mi>F</mi><mn>2</mn><mo>−</mo><mn>8040</mn></mrow></msub><mo>></mo><msub><mi>R</mi><mrow><mi>N</mi><mi>F</mi><mn>270</mn></mrow></msub><mo>></mo><msub><mi>R</mi><mrow><mi>T</mi><mi>M</mi><mi>N</mi><mn>20</mn><mi>H</mi><mo>−</mo><mn>400</mn></mrow></msub></mrow></semantics></math></inline-formula>. The physical explanation can be attributed to the influence of the inhomogeneous charge distribution on the electric field that arises spontaneously so as to maintain the electroneutrality within the nanopore.https://www.mdpi.com/2077-0375/11/2/104sulfadiazinerejection ratenanofiltration membranepolyamidemodeling |
| spellingShingle | Haochen Zhu Bo Hu Fengrui Yang Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and Mechanisms Membranes sulfadiazine rejection rate nanofiltration membrane polyamide modeling |
| title | Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and Mechanisms |
| title_full | Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and Mechanisms |
| title_fullStr | Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and Mechanisms |
| title_full_unstemmed | Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and Mechanisms |
| title_short | Removal of Sulfadiazine by Polyamide Nanofiltration Membranes: Measurement, Modeling, and Mechanisms |
| title_sort | removal of sulfadiazine by polyamide nanofiltration membranes measurement modeling and mechanisms |
| topic | sulfadiazine rejection rate nanofiltration membrane polyamide modeling |
| url | https://www.mdpi.com/2077-0375/11/2/104 |
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