{"title":"磁性MnFe2O4/MWCNT活化过氧单硫酸盐降解罗丹明B：效率、机理及影响因素","authors":"Lijia Zheng, Shoutao Cao, Meng Tang, Ming Ge","doi":"10.1007/s11270-024-07718-w","DOIUrl":null,"url":null,"abstract":"<div><p>A solvothermal route was used to synthesize manganese ferrite/multi-wall carbon nanotubes (MnFe<sub>2</sub>O<sub>4</sub>/MWCNT) composite catalyst, which was firstly employed to activate peroxymonosulfate (PMS) to eliminate rhodamine B (RhB) from water. The catalytic activity of the as-obtained MnFe<sub>2</sub>O<sub>4</sub>/MWCNT for PMS activation and RhB degradation was higher than that of MnFe<sub>2</sub>O<sub>4</sub> and MWCNT. The optimal MnFe<sub>2</sub>O<sub>4</sub>/MWCNT-10 catalyst (0.3 g/L) can remove 98.1% of RhB (20 mg/L) from water by activating PMS (1.0 g/L) after 100 min of reaction, and this catalyst remained stable in the oxidation process. Quenching experiments, X-ray photoelectron spectroscopy (XPS) and electrochemical analysis demonstrated that RhB elimination in the MnFe<sub>2</sub>O<sub>4</sub>/MWCNT-PMS system was accomplished by the non-radical (<sup>1</sup>O<sub>2</sub> and electron transfer) and free radical (O<sub>2</sub><sup>•−</sup>, SO<sub>4</sub><sup>•‒</sup> and •OH) oxidation pathways, and <sup>1</sup>O<sub>2</sub> played a leading role. The influence of operational factors (PMS dosage, initial solution pH, catalyst dosage, reaction temperature, common inorganic anions and water matrix) on RhB removal by MnFe<sub>2</sub>O<sub>4</sub>/MWCNT-10 activated PMS was investigated in detail. The presence of Cl<sup>‒</sup> ions significantly boosted RhB degradation due to the production of more <sup>1</sup>O<sub>2</sub>.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 1","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Activation of Peroxymonosulfate by Magnetic MnFe2O4/MWCNT Toward Rhodamine B Degradation: Efficiency, Mechanism and Influencing Factors\",\"authors\":\"Lijia Zheng, Shoutao Cao, Meng Tang, Ming Ge\",\"doi\":\"10.1007/s11270-024-07718-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A solvothermal route was used to synthesize manganese ferrite/multi-wall carbon nanotubes (MnFe<sub>2</sub>O<sub>4</sub>/MWCNT) composite catalyst, which was firstly employed to activate peroxymonosulfate (PMS) to eliminate rhodamine B (RhB) from water. The catalytic activity of the as-obtained MnFe<sub>2</sub>O<sub>4</sub>/MWCNT for PMS activation and RhB degradation was higher than that of MnFe<sub>2</sub>O<sub>4</sub> and MWCNT. The optimal MnFe<sub>2</sub>O<sub>4</sub>/MWCNT-10 catalyst (0.3 g/L) can remove 98.1% of RhB (20 mg/L) from water by activating PMS (1.0 g/L) after 100 min of reaction, and this catalyst remained stable in the oxidation process. Quenching experiments, X-ray photoelectron spectroscopy (XPS) and electrochemical analysis demonstrated that RhB elimination in the MnFe<sub>2</sub>O<sub>4</sub>/MWCNT-PMS system was accomplished by the non-radical (<sup>1</sup>O<sub>2</sub> and electron transfer) and free radical (O<sub>2</sub><sup>•−</sup>, SO<sub>4</sub><sup>•‒</sup> and •OH) oxidation pathways, and <sup>1</sup>O<sub>2</sub> played a leading role. The influence of operational factors (PMS dosage, initial solution pH, catalyst dosage, reaction temperature, common inorganic anions and water matrix) on RhB removal by MnFe<sub>2</sub>O<sub>4</sub>/MWCNT-10 activated PMS was investigated in detail. The presence of Cl<sup>‒</sup> ions significantly boosted RhB degradation due to the production of more <sup>1</sup>O<sub>2</sub>.</p></div>\",\"PeriodicalId\":808,\"journal\":{\"name\":\"Water, Air, & Soil Pollution\",\"volume\":\"236 1\",\"pages\":\"\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-12-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water, Air, & Soil Pollution\",\"FirstCategoryId\":\"6\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11270-024-07718-w\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water, Air, & Soil Pollution","FirstCategoryId":"6","ListUrlMain":"https://link.springer.com/article/10.1007/s11270-024-07718-w","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Activation of Peroxymonosulfate by Magnetic MnFe2O4/MWCNT Toward Rhodamine B Degradation: Efficiency, Mechanism and Influencing Factors
A solvothermal route was used to synthesize manganese ferrite/multi-wall carbon nanotubes (MnFe2O4/MWCNT) composite catalyst, which was firstly employed to activate peroxymonosulfate (PMS) to eliminate rhodamine B (RhB) from water. The catalytic activity of the as-obtained MnFe2O4/MWCNT for PMS activation and RhB degradation was higher than that of MnFe2O4 and MWCNT. The optimal MnFe2O4/MWCNT-10 catalyst (0.3 g/L) can remove 98.1% of RhB (20 mg/L) from water by activating PMS (1.0 g/L) after 100 min of reaction, and this catalyst remained stable in the oxidation process. Quenching experiments, X-ray photoelectron spectroscopy (XPS) and electrochemical analysis demonstrated that RhB elimination in the MnFe2O4/MWCNT-PMS system was accomplished by the non-radical (1O2 and electron transfer) and free radical (O2•−, SO4•‒ and •OH) oxidation pathways, and 1O2 played a leading role. The influence of operational factors (PMS dosage, initial solution pH, catalyst dosage, reaction temperature, common inorganic anions and water matrix) on RhB removal by MnFe2O4/MWCNT-10 activated PMS was investigated in detail. The presence of Cl‒ ions significantly boosted RhB degradation due to the production of more 1O2.
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Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
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Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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