Solubility of pyridine-2,6-dicarboxylic acid in supercritical carbon dioxide and its application for removal of lead and nickel in simulated matrices
| Autor: | G. Chandrasekhar, N. Sivaraman, J. Deepitha, K.C. Pitchaiah |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Ternary numeral system Supercritical carbon dioxide Aqueous solution General Chemical Engineering Inorganic chemistry Supercritical fluid extraction 02 engineering and technology 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Dicarboxylic acid 020401 chemical engineering chemistry Binary system Methanol 0204 chemical engineering Physical and Theoretical Chemistry Solubility |
| Zdroj: | The Journal of Supercritical Fluids. 176:105318 |
| ISSN: | 0896-8446 |
| Popis: | The solubility of pyridine-2,6-dicarboxylic acid in supercritical carbon dioxide was measured at 313–333 K and 10–20 MPa, using a flow-saturation technique. The influence of methanol on solubility behavior is investigated. The solubility in neat supercritical carbon dioxide ranged from 0.44 × 10−6 mol·moltot−1 to 3.4 × 10−6 mol·moltot−1, while its solubility in presence of methanol ranged from 0.17 × 10−5 mol·moltot−1 to 18.1 × 10−5 mol·moltot−1. The solubility data was modeled with Chrastil, Mendez-Teja, Garlapati equations and Peng-Robinson equation of state model. The solubility in the presence of methanol was correlated using modified Chrastil, modified Mendez-Teja and Thakur models. Among the models employed, Chrastil model (binary system) and modified Mendez-Teja model (ternary system) shown highest accordance with experimental data. Pyridine-2,6-dicarboxylic acid was employed as a chelating agent for development of a supercritical fluid extraction method for removal of Pb2+ and Ni2+ from simulated aqueous/soil matrices. |
| Databáze: | OpenAIRE |
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