Extraction properties for U(VI) by the 25, 27-dihydroxy-26, 28-dimercaptoethoxy-5, 11, 17, 23-tetra-tert-butyl calix[4]arene

Autor:	Chun Hsing Ho, Fang zhu Xiao, Guo wen Peng, Yi qiu Pu, Kang Zhang, Yu li Xu, Cheng Wang, Shu ya He
Rok vydání:	2019
Předmět:	Exothermic reaction biology Health Toxicology and Mutagenesis Thiophenol Extraction (chemistry) Enthalpy Public Health Environmental and Occupational Health 010403 inorganic & nuclear chemistry biology.organism_classification 01 natural sciences Pollution Medicinal chemistry 0104 chemical sciences Analytical Chemistry Gibbs free energy chemistry.chemical_compound symbols.namesake Nuclear Energy and Engineering chemistry Spontaneous process symbols Tetra Radiology Nuclear Medicine and imaging Spectroscopy Derivative (chemistry)
Zdroj:	Journal of Radioanalytical and Nuclear Chemistry. 321:49-55
ISSN:	1588-2780 0236-5731
DOI:	10.1007/s10967-019-06556-z
Popis:	The p-tert-butyl calix[4]arene thiophenol derivative was successfully synthesized with reflux condition and was characterized by FT-IR and 1H-NMR. This work mainly adopted the method of controlling variables. The results showed that the optimum pH value, temperature and extraction time were respectively 4.5, 25 °C and 90 min. By calculating the data of the enthalpy change and gibbs free energy, indicating that the process of reaction was an exothermic and spontaneous process, and it demonstrated a close agreement with pseudo-second-order kinetic model. It is also found that the coexisting cations on the extraction of uranium had greater influence.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eb05aae0b3b7d2bfa535f265e1a89e52 https://doi.org/10.1007/s10967-019-06556-z Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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