Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanism
In this study, manganese oxide supported biochar (MBC) was used as a catalyst of periodate (PI) for the oxidative degradation of sulfonamide antibiotic sulfamethazine (SMZ). The degradation rate of 10 mg/L SMZ reached 99 % in 60 min in the MBC/PI system, and the optimal condition was pH 3.5, 0.12 g/...
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Elsevier
2025-01-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651325000363 |
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| author | Shuheng Hu Hao Lu Wenyi Xie Shaohua Cao Jiaqi Shi Yang Guo Xin Zhu Zimu Xu Han Gao |
| author_facet | Shuheng Hu Hao Lu Wenyi Xie Shaohua Cao Jiaqi Shi Yang Guo Xin Zhu Zimu Xu Han Gao |
| author_sort | Shuheng Hu |
| collection | DOAJ |
| description | In this study, manganese oxide supported biochar (MBC) was used as a catalyst of periodate (PI) for the oxidative degradation of sulfonamide antibiotic sulfamethazine (SMZ). The degradation rate of 10 mg/L SMZ reached 99 % in 60 min in the MBC/PI system, and the optimal condition was pH 3.5, 0.12 g/L of MBC, and 0.17 mM of PI. Combined with quenching experiment and electron paramagnetic resonance (EPR) characterization, it was determined that the reactive oxygen species (ROS) participating in the reaction include iodate radical (IO3∙), singlet oxygen (1O2), and hydroxyl radical (∙OH). ROS, Mn(III) and electron transfer are three crucial SMZ removal mechanisms in MBC activated PI system, and the conversion process of reactive species was deduced. The manganese redox cycles, oxygen-containing functional groups on MBC surface, and BC-O-Mn(II) complex participated in reactive species production. The loading of manganese oxide increases the number of oxygen-containing functional group on the surface of BC, and BC-O-Mn(II) complex formation resulted in the higher catalytic activity compared with BC. Ten SMZ oxidative products and four transformation pathways was identified. This study provided an efficient and practical method to remove sulfonamide antibiotics and revealed its theoretical mechanism. |
| format | Article |
| id | doaj-art-aa42d88f443f441eaf78ebe55b52b0c8 |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-aa42d88f443f441eaf78ebe55b52b0c82025-01-23T05:26:09ZengElsevierEcotoxicology and Environmental Safety0147-65132025-01-01289117700Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanismShuheng Hu0Hao Lu1Wenyi Xie2Shaohua Cao3Jiaqi Shi4Yang Guo5Xin Zhu6Zimu Xu7Han Gao8School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, ChinaSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China; State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing, Jiangsu, 210042, ChinaState Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing, Jiangsu, 210042, ChinaState Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing, Jiangsu, 210042, ChinaState Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing, Jiangsu, 210042, China; Correspondence to: 8 Jiangwangmiao Street, Nanjing, PR China.State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing, Jiangsu, 210042, ChinaState Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing, Jiangsu, 210042, ChinaSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, ChinaState Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Nanjing, Jiangsu, 210042, China; Correspondence to: 8 Jiangwangmiao Street, Nanjing, PR China.In this study, manganese oxide supported biochar (MBC) was used as a catalyst of periodate (PI) for the oxidative degradation of sulfonamide antibiotic sulfamethazine (SMZ). The degradation rate of 10 mg/L SMZ reached 99 % in 60 min in the MBC/PI system, and the optimal condition was pH 3.5, 0.12 g/L of MBC, and 0.17 mM of PI. Combined with quenching experiment and electron paramagnetic resonance (EPR) characterization, it was determined that the reactive oxygen species (ROS) participating in the reaction include iodate radical (IO3∙), singlet oxygen (1O2), and hydroxyl radical (∙OH). ROS, Mn(III) and electron transfer are three crucial SMZ removal mechanisms in MBC activated PI system, and the conversion process of reactive species was deduced. The manganese redox cycles, oxygen-containing functional groups on MBC surface, and BC-O-Mn(II) complex participated in reactive species production. The loading of manganese oxide increases the number of oxygen-containing functional group on the surface of BC, and BC-O-Mn(II) complex formation resulted in the higher catalytic activity compared with BC. Ten SMZ oxidative products and four transformation pathways was identified. This study provided an efficient and practical method to remove sulfonamide antibiotics and revealed its theoretical mechanism.http://www.sciencedirect.com/science/article/pii/S0147651325000363BiocharManganese oxideAntibioticPeriodateAdvanced oxidation process |
| spellingShingle | Shuheng Hu Hao Lu Wenyi Xie Shaohua Cao Jiaqi Shi Yang Guo Xin Zhu Zimu Xu Han Gao Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanism Ecotoxicology and Environmental Safety Biochar Manganese oxide Antibiotic Periodate Advanced oxidation process |
| title | Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanism |
| title_full | Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanism |
| title_fullStr | Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanism |
| title_full_unstemmed | Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanism |
| title_short | Oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate: Effect and mechanism |
| title_sort | oxidative degradation of sulfamethazine by manganese oxide supported biochar activated periodate effect and mechanism |
| topic | Biochar Manganese oxide Antibiotic Periodate Advanced oxidation process |
| url | http://www.sciencedirect.com/science/article/pii/S0147651325000363 |
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