{"title":"二维纳米片 Bi2WO6 对煤化工酚氨废水中有机污染物的光催化臭氧氧化协同降解研究","authors":"Fei Li, Qiang Luo, Weijun Zhen, Qing Ge, Yushen Zhou, Chunmei Ma, Pengtao Sun, Jianbo Xu, Buning Chen","doi":"10.1007/s11270-024-07149-7","DOIUrl":null,"url":null,"abstract":"<p>In the work, bismuth tungstate (Bi<sub>2</sub>WO<sub>6</sub>, orthorhombic system) photocatalyst nanomaterial was synthesized by hydrothermal method. The photocatalytic ozonation oxidation synergistic degradation on organic pollutants in coal chemical phenol-ammonia wastewater by Bi<sub>2</sub>WO<sub>6</sub> was studied. The effects of ozone (O<sub>3</sub>) concentration, catalyst dosage, pH and O<sub>3</sub> flow rate on the degradation efficiency of wastewater were investigated, respectively. The study found that the degradation processes of these four single factors were fitted kinetically and aligned with the pseudo second order kinetics model, and the maximum chemical oxygen demand (COD) removal rate of the coal chemical phenol-ammonia wastewater was 56.34%, 79.03%, 78.63%, and 79.66%, respectively. The COD removal rate reached 80.37% under the optimum reaction conditions. Additionally, the degradation process was optimized, which conformed to the pseudo second order kinetics model. Density functional theory (DFT) calculations showed that the adsorption energies of O<sub>3</sub> at the Bi, W, and O atomic sites were -0.477 eV, -2.604 eV, and -0.421 eV, respectively, on the exposed crystalline surface of (131), indicating that O<sub>3</sub> had a stronger interaction force with W, which was easy to be activated by the surface-transferred electrons to form reactive oxygen species and mineralize the organic pollutants. The catalytic mechanism indicates that the photocatalytic ozonation oxidation is primarily accomplished by producing •OH, <sup>1</sup>O<sub>2</sub>, and <span>\\(\\bullet O_2^-\\)</span>, which results in the degradation on organic pollutants in coal chemical phenol-ammonia wastewater. The analysis of water quality and GC–MS indicated that most pollutants present in coal chemical phenol-ammonia wastewater had degraded upon treatment. Furthermore, the BOD/COD ratio of coal chemical phenol-ammonia wastewater was increased from 0.25 to 0.32. Moreover, the COD removal rate only decreased to 70.25% after five cycles of the experiment, which demonstrated that the Bi<sub>2</sub>WO<sub>6</sub> catalysts had a high stability and reusability, implying that it has great potential for application in coal chemical phenol-ammonia wastewater treatment.</p>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Photocatalytic Ozonation Oxidation Synergistic Degradation on Organic Pollutants In Coal Chemical Phenol-Ammonia Wastewater by Two-Dimensional Nanosheets Bi2WO6\",\"authors\":\"Fei Li, Qiang Luo, Weijun Zhen, Qing Ge, Yushen Zhou, Chunmei Ma, Pengtao Sun, Jianbo Xu, Buning Chen\",\"doi\":\"10.1007/s11270-024-07149-7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In the work, bismuth tungstate (Bi<sub>2</sub>WO<sub>6</sub>, orthorhombic system) photocatalyst nanomaterial was synthesized by hydrothermal method. The photocatalytic ozonation oxidation synergistic degradation on organic pollutants in coal chemical phenol-ammonia wastewater by Bi<sub>2</sub>WO<sub>6</sub> was studied. The effects of ozone (O<sub>3</sub>) concentration, catalyst dosage, pH and O<sub>3</sub> flow rate on the degradation efficiency of wastewater were investigated, respectively. The study found that the degradation processes of these four single factors were fitted kinetically and aligned with the pseudo second order kinetics model, and the maximum chemical oxygen demand (COD) removal rate of the coal chemical phenol-ammonia wastewater was 56.34%, 79.03%, 78.63%, and 79.66%, respectively. The COD removal rate reached 80.37% under the optimum reaction conditions. Additionally, the degradation process was optimized, which conformed to the pseudo second order kinetics model. Density functional theory (DFT) calculations showed that the adsorption energies of O<sub>3</sub> at the Bi, W, and O atomic sites were -0.477 eV, -2.604 eV, and -0.421 eV, respectively, on the exposed crystalline surface of (131), indicating that O<sub>3</sub> had a stronger interaction force with W, which was easy to be activated by the surface-transferred electrons to form reactive oxygen species and mineralize the organic pollutants. The catalytic mechanism indicates that the photocatalytic ozonation oxidation is primarily accomplished by producing •OH, <sup>1</sup>O<sub>2</sub>, and <span>\\\\(\\\\bullet O_2^-\\\\)</span>, which results in the degradation on organic pollutants in coal chemical phenol-ammonia wastewater. The analysis of water quality and GC–MS indicated that most pollutants present in coal chemical phenol-ammonia wastewater had degraded upon treatment. Furthermore, the BOD/COD ratio of coal chemical phenol-ammonia wastewater was increased from 0.25 to 0.32. Moreover, the COD removal rate only decreased to 70.25% after five cycles of the experiment, which demonstrated that the Bi<sub>2</sub>WO<sub>6</sub> catalysts had a high stability and reusability, implying that it has great potential for application in coal chemical phenol-ammonia wastewater treatment.</p>\",\"PeriodicalId\":808,\"journal\":{\"name\":\"Water, Air, & Soil Pollution\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-05-27\",\"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://doi.org/10.1007/s11270-024-07149-7\",\"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://doi.org/10.1007/s11270-024-07149-7","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}
The Photocatalytic Ozonation Oxidation Synergistic Degradation on Organic Pollutants In Coal Chemical Phenol-Ammonia Wastewater by Two-Dimensional Nanosheets Bi2WO6
In the work, bismuth tungstate (Bi2WO6, orthorhombic system) photocatalyst nanomaterial was synthesized by hydrothermal method. The photocatalytic ozonation oxidation synergistic degradation on organic pollutants in coal chemical phenol-ammonia wastewater by Bi2WO6 was studied. The effects of ozone (O3) concentration, catalyst dosage, pH and O3 flow rate on the degradation efficiency of wastewater were investigated, respectively. The study found that the degradation processes of these four single factors were fitted kinetically and aligned with the pseudo second order kinetics model, and the maximum chemical oxygen demand (COD) removal rate of the coal chemical phenol-ammonia wastewater was 56.34%, 79.03%, 78.63%, and 79.66%, respectively. The COD removal rate reached 80.37% under the optimum reaction conditions. Additionally, the degradation process was optimized, which conformed to the pseudo second order kinetics model. Density functional theory (DFT) calculations showed that the adsorption energies of O3 at the Bi, W, and O atomic sites were -0.477 eV, -2.604 eV, and -0.421 eV, respectively, on the exposed crystalline surface of (131), indicating that O3 had a stronger interaction force with W, which was easy to be activated by the surface-transferred electrons to form reactive oxygen species and mineralize the organic pollutants. The catalytic mechanism indicates that the photocatalytic ozonation oxidation is primarily accomplished by producing •OH, 1O2, and \(\bullet O_2^-\), which results in the degradation on organic pollutants in coal chemical phenol-ammonia wastewater. The analysis of water quality and GC–MS indicated that most pollutants present in coal chemical phenol-ammonia wastewater had degraded upon treatment. Furthermore, the BOD/COD ratio of coal chemical phenol-ammonia wastewater was increased from 0.25 to 0.32. Moreover, the COD removal rate only decreased to 70.25% after five cycles of the experiment, which demonstrated that the Bi2WO6 catalysts had a high stability and reusability, implying that it has great potential for application in coal chemical phenol-ammonia wastewater treatment.
期刊介绍:
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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