{"title":"锆在羟基乙酸、3-羟基丙酸和2,3-二羟基丙酸存在下溶解度的热力学解释","authors":"Taishi Kobayashi, W. Peng, T. Sasaki","doi":"10.14494/JNRS.20.20","DOIUrl":null,"url":null,"abstract":"The solubility of zirconium hydroxide in the presence of hydroxyacetic (glycolic, O20), 3-hydroxypropionic (O21), and 2,3-dihydroxypropanoic (glyceric, O201) acids was investigated as a function of pH c = −log [H + ] = 7−13 and total hydroxycarboxylic acid concentrations, [L] tot = 10 −4 −10 −1 mol/dm 3 . The Zr solubility dependences on pH c and [L] tot indicated that ternary Zr(OH) 4 (L) 22− complexes were the dominant soluble species under the experimental conditions. The formation constants of the Zr(OH) 4 (L) 22− complexes were determined by least square fitting analysis of the solubility data and compared to the values for zirconium-poly(hydroxy)carboxylate analogs to elucidate the complexation mechanism of Zr-hydroxycarboxylates.","PeriodicalId":16569,"journal":{"name":"Journal of nuclear and radiochemical sciences","volume":"39 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Thermodynamic interpretation of zirconium solubility in the presence of hydroxyacetic, 3-hydroxypropionic, and 2,3-dihydroxypropanoic acids\",\"authors\":\"Taishi Kobayashi, W. Peng, T. Sasaki\",\"doi\":\"10.14494/JNRS.20.20\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The solubility of zirconium hydroxide in the presence of hydroxyacetic (glycolic, O20), 3-hydroxypropionic (O21), and 2,3-dihydroxypropanoic (glyceric, O201) acids was investigated as a function of pH c = −log [H + ] = 7−13 and total hydroxycarboxylic acid concentrations, [L] tot = 10 −4 −10 −1 mol/dm 3 . The Zr solubility dependences on pH c and [L] tot indicated that ternary Zr(OH) 4 (L) 22− complexes were the dominant soluble species under the experimental conditions. The formation constants of the Zr(OH) 4 (L) 22− complexes were determined by least square fitting analysis of the solubility data and compared to the values for zirconium-poly(hydroxy)carboxylate analogs to elucidate the complexation mechanism of Zr-hydroxycarboxylates.\",\"PeriodicalId\":16569,\"journal\":{\"name\":\"Journal of nuclear and radiochemical sciences\",\"volume\":\"39 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of nuclear and radiochemical sciences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.14494/JNRS.20.20\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of nuclear and radiochemical sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14494/JNRS.20.20","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
研究了氢氧化锆在羟基乙酸(乙醇酸，O20)、3-羟基丙酸(O21)和2,3-二羟基丙酸(甘油，O201)酸存在下的溶解度，考察了pH c =−log [H +] = 7−13和总羟基羧酸浓度[L] tot = 10−4−10−1 mol/dm 3的函数。Zr溶解度对pH c和[L] tot的依赖性表明，在实验条件下，三元Zr(OH) 4 (L) 22−配合物是主要的可溶性物质。通过溶解度数据的最小二乘拟合分析确定了Zr(OH) 4 (L) 22−配合物的形成常数，并与聚羟基羧酸锆类似物的值进行了比较，以阐明Zr-羟基羧酸锆的络合机理。
Thermodynamic interpretation of zirconium solubility in the presence of hydroxyacetic, 3-hydroxypropionic, and 2,3-dihydroxypropanoic acids
The solubility of zirconium hydroxide in the presence of hydroxyacetic (glycolic, O20), 3-hydroxypropionic (O21), and 2,3-dihydroxypropanoic (glyceric, O201) acids was investigated as a function of pH c = −log [H + ] = 7−13 and total hydroxycarboxylic acid concentrations, [L] tot = 10 −4 −10 −1 mol/dm 3 . The Zr solubility dependences on pH c and [L] tot indicated that ternary Zr(OH) 4 (L) 22− complexes were the dominant soluble species under the experimental conditions. The formation constants of the Zr(OH) 4 (L) 22− complexes were determined by least square fitting analysis of the solubility data and compared to the values for zirconium-poly(hydroxy)carboxylate analogs to elucidate the complexation mechanism of Zr-hydroxycarboxylates.
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