Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and Mechanism
The oxidative mineralization of sulfanilamide drugs (SAs) using micro-size zero-valent iron (mZVI) cooperated with a citric acid buffer solution was evaluated. In this study SM2, SMX, and SD could be removed at 66%, 89%, and 83%, respectively, in a 0.5% Bi/mZVI+CA+NaCA system within 2 h. Based on ou...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Antibiotics |
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| Online Access: | https://www.mdpi.com/2079-6382/11/1/51 |
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| author | Xiaoming Su Hao Lv Jianyu Gong Man Zhou |
| author_facet | Xiaoming Su Hao Lv Jianyu Gong Man Zhou |
| author_sort | Xiaoming Su |
| collection | DOAJ |
| description | The oxidative mineralization of sulfanilamide drugs (SAs) using micro-size zero-valent iron (mZVI) cooperated with a citric acid buffer solution was evaluated. In this study SM2, SMX, and SD could be removed at 66%, 89%, and 83%, respectively, in a 0.5% Bi/mZVI+CA+NaCA system within 2 h. Based on our analysis, the produced ·OH could be ascribed from the complexation between citrate iron (Fe(II)[Cit]<sup>−</sup>) and the generated H<sub>2</sub>O<sub>2</sub> resulting from the activation of O<sub>2</sub> on the mZVI surface in the Bi/mZVI+CA+NaCA system, further inducing the mineralization of antibiotics. The related possible degradation pathways were proposed. Two similar degradation pathways of SM2, SMX, and SD in the mixed liquid, including hydroxylation and SO<sub>2</sub> extrusion, were solved. Meanwhile, there was an additional proposed degradation pathway for SMX to be degraded more effectively, as reflected in the opening of the N-O bond on the benzene ring. Therefore, this work provides an experimental basis and theoretical support for the efficient treatment of antibiotic wastewater in real industry by using an iron-based method. |
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| id | doaj.art-aa4b87cd1f7d4bf49cf17cc1ff2f6a6e |
| institution | Directory Open Access Journal |
| issn | 2079-6382 |
| language | English |
| last_indexed | 2024-03-10T03:02:59Z |
| publishDate | 2022-01-01 |
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| record_format | Article |
| series | Antibiotics |
| spelling | doaj.art-aa4b87cd1f7d4bf49cf17cc1ff2f6a6e2023-11-23T12:43:52ZengMDPI AGAntibiotics2079-63822022-01-011115110.3390/antibiotics11010051Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and MechanismXiaoming Su0Hao Lv1Jianyu Gong2Man Zhou3School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaHubei Electromechanical Research Institute Co., Ltd., Wuhan 430070, ChinaThe oxidative mineralization of sulfanilamide drugs (SAs) using micro-size zero-valent iron (mZVI) cooperated with a citric acid buffer solution was evaluated. In this study SM2, SMX, and SD could be removed at 66%, 89%, and 83%, respectively, in a 0.5% Bi/mZVI+CA+NaCA system within 2 h. Based on our analysis, the produced ·OH could be ascribed from the complexation between citrate iron (Fe(II)[Cit]<sup>−</sup>) and the generated H<sub>2</sub>O<sub>2</sub> resulting from the activation of O<sub>2</sub> on the mZVI surface in the Bi/mZVI+CA+NaCA system, further inducing the mineralization of antibiotics. The related possible degradation pathways were proposed. Two similar degradation pathways of SM2, SMX, and SD in the mixed liquid, including hydroxylation and SO<sub>2</sub> extrusion, were solved. Meanwhile, there was an additional proposed degradation pathway for SMX to be degraded more effectively, as reflected in the opening of the N-O bond on the benzene ring. Therefore, this work provides an experimental basis and theoretical support for the efficient treatment of antibiotic wastewater in real industry by using an iron-based method.https://www.mdpi.com/2079-6382/11/1/51sulfanilamide drugsBi/mZVIantibioticoxidative degradation |
| spellingShingle | Xiaoming Su Hao Lv Jianyu Gong Man Zhou Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and Mechanism Antibiotics sulfanilamide drugs Bi/mZVI antibiotic oxidative degradation |
| title | Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and Mechanism |
| title_full | Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and Mechanism |
| title_fullStr | Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and Mechanism |
| title_full_unstemmed | Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and Mechanism |
| title_short | Bi/mZVI Combined with Citric Acid and Sodium Citrate to Mineralize Multiple Sulfa Antibiotics: Performance and Mechanism |
| title_sort | bi mzvi combined with citric acid and sodium citrate to mineralize multiple sulfa antibiotics performance and mechanism |
| topic | sulfanilamide drugs Bi/mZVI antibiotic oxidative degradation |
| url | https://www.mdpi.com/2079-6382/11/1/51 |
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