Ramesh K. Mishra, G.L. Mundhara, V.K. Jain, J.S. Tiwari
{"title":"酸预处理氧化铝的吸附-解吸研究II。hno3处理氧化铝上的氧阴离子","authors":"Ramesh K. Mishra, G.L. Mundhara, V.K. Jain, J.S. Tiwari","doi":"10.1016/0376-4583(85)90095-0","DOIUrl":null,"url":null,"abstract":"<div><p>Sorption-desorption behaviour of three oxyanions (<em>MnO</em><sub>4</sub><sup>−</sup>, <em>CrO</em><sub>4</sub><sup>2-</sup> and <em>VO</em><sub>3</sub><sup>−</sup>) on chromatographic alumina pretreated with HNO<sub>3</sub> is described. The sorption is found to be pH dependent, and has maxima at surface pH values of 3.5 (<em>MnO</em><sub>4</sub><sup>−</sup>), 2.5 (<em>VO</em><sub>3</sub><sup>−</sup>) and 2.0 (<em>CrO</em><sub>4</sub><sup>2−</sup>). The affinity of MnO<sub>4</sub><sup>-</sup> and CrO<sub>4</sub><sup>2-</sup> is almost negligible at surface pH values of 5.5 or more. However, VO<sub>3</sub><sup>-</sup> shows affinity for the substrate in the pH range 5.0 - 8.8. The monovalent anion appears to be sorbed, primarily via electrostatic interaction with the surface sites created by the acid treatment. The CrO<sub>4</sub><sup>2-</sup> appears to involve ion exchange and weak chemical interactions. Mixtures of the oxyanions have been separated (binary and ternary) by column chromatography using inorganic electrolytes as eluents.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"26 4","pages":"Pages 315-329"},"PeriodicalIF":0.0000,"publicationDate":"1985-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90095-0","citationCount":"4","resultStr":"{\"title\":\"Sorption-desorption studies on alumina pretreated with acids: II. Oxyanions on HNO3-treated alumina\",\"authors\":\"Ramesh K. Mishra, G.L. Mundhara, V.K. Jain, J.S. Tiwari\",\"doi\":\"10.1016/0376-4583(85)90095-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Sorption-desorption behaviour of three oxyanions (<em>MnO</em><sub>4</sub><sup>−</sup>, <em>CrO</em><sub>4</sub><sup>2-</sup> and <em>VO</em><sub>3</sub><sup>−</sup>) on chromatographic alumina pretreated with HNO<sub>3</sub> is described. The sorption is found to be pH dependent, and has maxima at surface pH values of 3.5 (<em>MnO</em><sub>4</sub><sup>−</sup>), 2.5 (<em>VO</em><sub>3</sub><sup>−</sup>) and 2.0 (<em>CrO</em><sub>4</sub><sup>2−</sup>). The affinity of MnO<sub>4</sub><sup>-</sup> and CrO<sub>4</sub><sup>2-</sup> is almost negligible at surface pH values of 5.5 or more. However, VO<sub>3</sub><sup>-</sup> shows affinity for the substrate in the pH range 5.0 - 8.8. The monovalent anion appears to be sorbed, primarily via electrostatic interaction with the surface sites created by the acid treatment. The CrO<sub>4</sub><sup>2-</sup> appears to involve ion exchange and weak chemical interactions. Mixtures of the oxyanions have been separated (binary and ternary) by column chromatography using inorganic electrolytes as eluents.</p></div>\",\"PeriodicalId\":22037,\"journal\":{\"name\":\"Surface Technology\",\"volume\":\"26 4\",\"pages\":\"Pages 315-329\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1985-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0376-4583(85)90095-0\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Surface Technology\",\"FirstCategoryId\":\"1087\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0376458385900950\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surface Technology","FirstCategoryId":"1087","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0376458385900950","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Sorption-desorption studies on alumina pretreated with acids: II. Oxyanions on HNO3-treated alumina
Sorption-desorption behaviour of three oxyanions (MnO4−, CrO42- and VO3−) on chromatographic alumina pretreated with HNO3 is described. The sorption is found to be pH dependent, and has maxima at surface pH values of 3.5 (MnO4−), 2.5 (VO3−) and 2.0 (CrO42−). The affinity of MnO4- and CrO42- is almost negligible at surface pH values of 5.5 or more. However, VO3- shows affinity for the substrate in the pH range 5.0 - 8.8. The monovalent anion appears to be sorbed, primarily via electrostatic interaction with the surface sites created by the acid treatment. The CrO42- appears to involve ion exchange and weak chemical interactions. Mixtures of the oxyanions have been separated (binary and ternary) by column chromatography using inorganic electrolytes as eluents.