{"title":"结构控制合成三钛酸钠和六钛酸钠纳米棒及其对水溶液中 Ni2+ 和 Pb2+ 离子的吸附性能","authors":"Chaochao Hao, Aili Wang, Hengbo Yin","doi":"10.1007/s11270-024-07531-5","DOIUrl":null,"url":null,"abstract":"<div><p>Phase pure sodium trititanate (Na<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub>) and hexatitanate (Na<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>) nanorods were controllably synthesized using sodium carbonate and titanic acid as sodium and titanium precursors by calcination at 850 °C for 12 h. The adsorption properties of trititanate and hexatitanate nanorods for the removal of heavy metal ions, Ni<sup>2+</sup> and Pb<sup>2+</sup> from simulated wastewaters at pH of 3‒7 and 20‒65 °C were investigated. The adsorption of Ni<sup>2+</sup> and Pb<sup>2+</sup> ions on sodium trititanate and hexatitanate nanorods are through ion exchange and electrostatic adsorption. The adsorption of Ni<sup>2+</sup> and Pb<sup>2+</sup> ions could be well fitted by the pseudo-second order adsorption kinetics and Langmuir adsorption isotherm. Based on the Langmuir adsorption isotherm, the adsorption capacities of naked sodium trititanate nanorods for Ni<sup>2+</sup> and Pb<sup>2+</sup> from simulated wastewaters at 20 °C and pH 7 are 104.17 and 89.85 mg∙g<sup>‒1</sup> while the adsorption capacities of naked sodium hexatitanate nanorods are 95.69 and 76.69 mg∙g<sup>‒1</sup>, respectively. Sodium trititanate nanorods exhibit higher adsorption capacities for heavy metal ions from wastewaters than sodium hexatitanate nanorods because the former has richer Na<sup>+</sup> ions for ion exchange with heavy metal ions than the latter. The adsorption processes of Ni<sup>2+</sup> and Pb<sup>2+</sup> on sodium trititanate and hexatitanate nanorods are spontaneous. The phase pure sodium titanate nanorods may have practical application for the removal and enrichment of metal ions from wastewaters.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"235 11","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Structure-Controlled Synthesis of Sodium Trititanate and Hexatitanate Nanorods and their Adsorption Properties for Ni2+and Pb2+ Ions from Aqueous Solutions\",\"authors\":\"Chaochao Hao, Aili Wang, Hengbo Yin\",\"doi\":\"10.1007/s11270-024-07531-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Phase pure sodium trititanate (Na<sub>2</sub>Ti<sub>3</sub>O<sub>7</sub>) and hexatitanate (Na<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub>) nanorods were controllably synthesized using sodium carbonate and titanic acid as sodium and titanium precursors by calcination at 850 °C for 12 h. The adsorption properties of trititanate and hexatitanate nanorods for the removal of heavy metal ions, Ni<sup>2+</sup> and Pb<sup>2+</sup> from simulated wastewaters at pH of 3‒7 and 20‒65 °C were investigated. The adsorption of Ni<sup>2+</sup> and Pb<sup>2+</sup> ions on sodium trititanate and hexatitanate nanorods are through ion exchange and electrostatic adsorption. The adsorption of Ni<sup>2+</sup> and Pb<sup>2+</sup> ions could be well fitted by the pseudo-second order adsorption kinetics and Langmuir adsorption isotherm. Based on the Langmuir adsorption isotherm, the adsorption capacities of naked sodium trititanate nanorods for Ni<sup>2+</sup> and Pb<sup>2+</sup> from simulated wastewaters at 20 °C and pH 7 are 104.17 and 89.85 mg∙g<sup>‒1</sup> while the adsorption capacities of naked sodium hexatitanate nanorods are 95.69 and 76.69 mg∙g<sup>‒1</sup>, respectively. Sodium trititanate nanorods exhibit higher adsorption capacities for heavy metal ions from wastewaters than sodium hexatitanate nanorods because the former has richer Na<sup>+</sup> ions for ion exchange with heavy metal ions than the latter. The adsorption processes of Ni<sup>2+</sup> and Pb<sup>2+</sup> on sodium trititanate and hexatitanate nanorods are spontaneous. The phase pure sodium titanate nanorods may have practical application for the removal and enrichment of metal ions from wastewaters.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":808,\"journal\":{\"name\":\"Water, Air, & Soil Pollution\",\"volume\":\"235 11\",\"pages\":\"\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-10-08\",\"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/s11270-024-07531-5\",\"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/s11270-024-07531-5","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}
Structure-Controlled Synthesis of Sodium Trititanate and Hexatitanate Nanorods and their Adsorption Properties for Ni2+and Pb2+ Ions from Aqueous Solutions
Phase pure sodium trititanate (Na2Ti3O7) and hexatitanate (Na2Ti6O13) nanorods were controllably synthesized using sodium carbonate and titanic acid as sodium and titanium precursors by calcination at 850 °C for 12 h. The adsorption properties of trititanate and hexatitanate nanorods for the removal of heavy metal ions, Ni2+ and Pb2+ from simulated wastewaters at pH of 3‒7 and 20‒65 °C were investigated. The adsorption of Ni2+ and Pb2+ ions on sodium trititanate and hexatitanate nanorods are through ion exchange and electrostatic adsorption. The adsorption of Ni2+ and Pb2+ ions could be well fitted by the pseudo-second order adsorption kinetics and Langmuir adsorption isotherm. Based on the Langmuir adsorption isotherm, the adsorption capacities of naked sodium trititanate nanorods for Ni2+ and Pb2+ from simulated wastewaters at 20 °C and pH 7 are 104.17 and 89.85 mg∙g‒1 while the adsorption capacities of naked sodium hexatitanate nanorods are 95.69 and 76.69 mg∙g‒1, respectively. Sodium trititanate nanorods exhibit higher adsorption capacities for heavy metal ions from wastewaters than sodium hexatitanate nanorods because the former has richer Na+ ions for ion exchange with heavy metal ions than the latter. The adsorption processes of Ni2+ and Pb2+ on sodium trititanate and hexatitanate nanorods are spontaneous. The phase pure sodium titanate nanorods may have practical application for the removal and enrichment of metal ions from wastewaters.
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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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