Thi Minh Hang Tran, Thi Duyen Tran, Thi Diu Dinh, Manh Khai Nguyen, Nguyen Thi Ngoc Anh, Nguyen Kim Nga, Thi Hai Yen Doan, Tien Duc Pham
{"title":"利用 MnO2 胶体颗粒研究环丙沙星和六价铬在水中的单独和二元混合物的吸附特性","authors":"Thi Minh Hang Tran, Thi Duyen Tran, Thi Diu Dinh, Manh Khai Nguyen, Nguyen Thi Ngoc Anh, Nguyen Kim Nga, Thi Hai Yen Doan, Tien Duc Pham","doi":"10.1007/s00396-024-05275-6","DOIUrl":null,"url":null,"abstract":"<div><p>In the present study, the MnO<sub>2</sub> adsorbents with a crystal structure, the components of approximately 59% Mn and 40% O, and the specific linkages of -OH and O-Mn-O were characterized by the techniques XDR, EDX, and FI-IR, respectively. Especially, the individual and simultaneous adsorptions of chromium, Cr(VI), and an antibiotic, CFX, on the manganese dioxide (MnO<sub>2</sub>) material were systematically investigated. Compared with the individual adsorption, the CFX adsorption efficiency was significantly reduced in the Cr(VI) presence due to the Cr(VI)-CFX complexation formed by the Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> or HCrO<sub>4</sub><sup>−</sup>-NH<sub>2</sub><sup>+</sup> electrostatic attractions. The optimal experimental conditions for the Cr(VI)-CFX simultaneous adsorption were found to be pH 6, 1 mM NaCl, 60 min contact time, and 50 mg.mL<sup>−1</sup> MnO<sub>2</sub> dosage. The maximum adsorption efficiencies of the Cr(VI) and the CFX on the MnO<sub>2</sub> were achieved at 98.1 and 87.5%, respectively. The maximum adsorption capacities of the Cr(VI) and CFX were correspondingly extrapolated to be 144.5 and 100.1 mg.g<sup>−1</sup> by the Langmuir adsorption model. The Cr(VI)-CFX simultaneous adsorption was adequately described by the Freundlich isotherm and the pseudo-second kinetic models. The chemisorption of Cr(VI)-CFX governed the simultaneous adsorption with the formation of multiple adsorbed layers.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":520,"journal":{"name":"Colloid and Polymer Science","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Adsorption characteristics of individual and binary mixtures of ciprofloxacin and Cr(VI) in water using MnO2 colloidal particles\",\"authors\":\"Thi Minh Hang Tran, Thi Duyen Tran, Thi Diu Dinh, Manh Khai Nguyen, Nguyen Thi Ngoc Anh, Nguyen Kim Nga, Thi Hai Yen Doan, Tien Duc Pham\",\"doi\":\"10.1007/s00396-024-05275-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the present study, the MnO<sub>2</sub> adsorbents with a crystal structure, the components of approximately 59% Mn and 40% O, and the specific linkages of -OH and O-Mn-O were characterized by the techniques XDR, EDX, and FI-IR, respectively. Especially, the individual and simultaneous adsorptions of chromium, Cr(VI), and an antibiotic, CFX, on the manganese dioxide (MnO<sub>2</sub>) material were systematically investigated. Compared with the individual adsorption, the CFX adsorption efficiency was significantly reduced in the Cr(VI) presence due to the Cr(VI)-CFX complexation formed by the Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup> or HCrO<sub>4</sub><sup>−</sup>-NH<sub>2</sub><sup>+</sup> electrostatic attractions. The optimal experimental conditions for the Cr(VI)-CFX simultaneous adsorption were found to be pH 6, 1 mM NaCl, 60 min contact time, and 50 mg.mL<sup>−1</sup> MnO<sub>2</sub> dosage. The maximum adsorption efficiencies of the Cr(VI) and the CFX on the MnO<sub>2</sub> were achieved at 98.1 and 87.5%, respectively. The maximum adsorption capacities of the Cr(VI) and CFX were correspondingly extrapolated to be 144.5 and 100.1 mg.g<sup>−1</sup> by the Langmuir adsorption model. The Cr(VI)-CFX simultaneous adsorption was adequately described by the Freundlich isotherm and the pseudo-second kinetic models. 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Adsorption characteristics of individual and binary mixtures of ciprofloxacin and Cr(VI) in water using MnO2 colloidal particles
In the present study, the MnO2 adsorbents with a crystal structure, the components of approximately 59% Mn and 40% O, and the specific linkages of -OH and O-Mn-O were characterized by the techniques XDR, EDX, and FI-IR, respectively. Especially, the individual and simultaneous adsorptions of chromium, Cr(VI), and an antibiotic, CFX, on the manganese dioxide (MnO2) material were systematically investigated. Compared with the individual adsorption, the CFX adsorption efficiency was significantly reduced in the Cr(VI) presence due to the Cr(VI)-CFX complexation formed by the Cr2O72− or HCrO4−-NH2+ electrostatic attractions. The optimal experimental conditions for the Cr(VI)-CFX simultaneous adsorption were found to be pH 6, 1 mM NaCl, 60 min contact time, and 50 mg.mL−1 MnO2 dosage. The maximum adsorption efficiencies of the Cr(VI) and the CFX on the MnO2 were achieved at 98.1 and 87.5%, respectively. The maximum adsorption capacities of the Cr(VI) and CFX were correspondingly extrapolated to be 144.5 and 100.1 mg.g−1 by the Langmuir adsorption model. The Cr(VI)-CFX simultaneous adsorption was adequately described by the Freundlich isotherm and the pseudo-second kinetic models. The chemisorption of Cr(VI)-CFX governed the simultaneous adsorption with the formation of multiple adsorbed layers.
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Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.
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