Artem A. Novikov*, Nikita Kovalenko and Irina A. Uspenskaya,
{"title":"H2O-Na +, K+ || HPO42 -, PO43 -体系的热力学模拟","authors":"Artem A. Novikov*, Nikita Kovalenko and Irina A. Uspenskaya, ","doi":"10.1021/acs.jced.5c00393","DOIUrl":null,"url":null,"abstract":"<p >A comprehensive thermodynamic model for aqueous solutions containing sodium and potassium monohydrogen phosphates has been developed based on the Pitzer–Simonson–Clegg formalism for excess properties, the Helgeson–Kirkham–Flowers equation of state for standard-state properties, and the IAPWS formulations for pure water. The model accounts explicitly for acid–base equilibria among H<sub>2</sub>PO<sub>4</sub><sup>–</sup>, HPO<sub>4</sub><sup>2–</sup>, and PO<sub>4</sub><sup>3–</sup> species and includes all necessary ion–ion and ion–neutral interactions to accurately describe solution properties over a wide temperature range. Thermodynamic parameters were evaluated using critically selected literature data on osmotic coefficients, water activity, solubility, enthalpies of dilution, and heat capacities. Solubility products of relevant solid phases, including multiple hydrates of Na<sub>2</sub>HPO<sub>4</sub> and K<sub>2</sub>HPO<sub>4</sub>, were parametrized. The resulting model reproduces experimental phase equilibria and thermodynamic properties with high accuracy from the crystallization to the boiling point of saturated solutions. The model forms a foundation for the future inclusion of dihydrogen phosphate species and enables the consistent prediction of multicomponent phosphate solution behavior across wide concentration and temperature ranges.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 9","pages":"3638–3655"},"PeriodicalIF":2.1000,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Thermodynamic Modeling of the H2O–Na+, K+ || HPO42–, PO43– System\",\"authors\":\"Artem A. Novikov*, Nikita Kovalenko and Irina A. Uspenskaya, \",\"doi\":\"10.1021/acs.jced.5c00393\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >A comprehensive thermodynamic model for aqueous solutions containing sodium and potassium monohydrogen phosphates has been developed based on the Pitzer–Simonson–Clegg formalism for excess properties, the Helgeson–Kirkham–Flowers equation of state for standard-state properties, and the IAPWS formulations for pure water. The model accounts explicitly for acid–base equilibria among H<sub>2</sub>PO<sub>4</sub><sup>–</sup>, HPO<sub>4</sub><sup>2–</sup>, and PO<sub>4</sub><sup>3–</sup> species and includes all necessary ion–ion and ion–neutral interactions to accurately describe solution properties over a wide temperature range. Thermodynamic parameters were evaluated using critically selected literature data on osmotic coefficients, water activity, solubility, enthalpies of dilution, and heat capacities. Solubility products of relevant solid phases, including multiple hydrates of Na<sub>2</sub>HPO<sub>4</sub> and K<sub>2</sub>HPO<sub>4</sub>, were parametrized. The resulting model reproduces experimental phase equilibria and thermodynamic properties with high accuracy from the crystallization to the boiling point of saturated solutions. The model forms a foundation for the future inclusion of dihydrogen phosphate species and enables the consistent prediction of multicomponent phosphate solution behavior across wide concentration and temperature ranges.</p>\",\"PeriodicalId\":42,\"journal\":{\"name\":\"Journal of Chemical & Engineering Data\",\"volume\":\"70 9\",\"pages\":\"3638–3655\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2025-08-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Chemical & Engineering Data\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acs.jced.5c00393\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical & Engineering Data","FirstCategoryId":"1","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.jced.5c00393","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Thermodynamic Modeling of the H2O–Na+, K+ || HPO42–, PO43– System
A comprehensive thermodynamic model for aqueous solutions containing sodium and potassium monohydrogen phosphates has been developed based on the Pitzer–Simonson–Clegg formalism for excess properties, the Helgeson–Kirkham–Flowers equation of state for standard-state properties, and the IAPWS formulations for pure water. The model accounts explicitly for acid–base equilibria among H2PO4–, HPO42–, and PO43– species and includes all necessary ion–ion and ion–neutral interactions to accurately describe solution properties over a wide temperature range. Thermodynamic parameters were evaluated using critically selected literature data on osmotic coefficients, water activity, solubility, enthalpies of dilution, and heat capacities. Solubility products of relevant solid phases, including multiple hydrates of Na2HPO4 and K2HPO4, were parametrized. The resulting model reproduces experimental phase equilibria and thermodynamic properties with high accuracy from the crystallization to the boiling point of saturated solutions. The model forms a foundation for the future inclusion of dihydrogen phosphate species and enables the consistent prediction of multicomponent phosphate solution behavior across wide concentration and temperature ranges.
期刊介绍:
The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.