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1998•Acta Scientiarum Naturalium Universitatis SunyatseniRequires access

The dodecyltolylsulfoxide extraction of uranium （VI）

YangYan-Zhao, YangYong-Hui

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Abstract

The liquid-liquid extraction behavior of uranium (VI) from aqueous nitric acid media with dodecyltolylsulfoxide (DTSO) has been studied overa wide range of conditions.The extracted species appear to be UO2(NO3)2·2DTSO.It was found that the extraction was increased with increasing nitric acid concentration up to 5mol/L HNO3 andthen decreased,and the extraction of uranium (VI) decreased with increasing temperature.So it can be deduced that the process of extraction is exothermic and the enthalpy of theextraction obtained is ΔH=-16.3kJ/mol.

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What this paper is about

The liquid-liquid extraction behavior of uranium (VI) from aqueous nitric acid media with dodecyltolylsulfoxide (DTSO) has been studied overa wide range of conditions.The extracted species appear to be UO2(NO3)2·2DTSO.It was found that the extraction was increased with increasing nitric acid concentration up to 5mol/L HNO3 andthen decreased,and the extraction of uranium (VI) decreased with increasing temperature.So it can be deduced that the process of extraction is exothermic and the enthalpy of theextraction obtained is ΔH=-16.3kJ/mol.

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Available abstract

The liquid-liquid extraction behavior of uranium (VI) from aqueous nitric acid media with dodecyltolylsulfoxide (DTSO) has been studied overa wide range of conditions.The extracted species appear to be UO2(NO3)2·2DTSO.It was found that the extraction was increased with increasing nitric acid concentration up to 5mol/L HNO3 andthen decreased,and the extraction of uranium (VI) decreased with increasing temperature.So it can be deduced that the process of extraction is exothermic and the enthalpy of theextraction obtained is ΔH=-16.3kJ/mol.

Key concepts: Uranium, Nitric acid, Extraction (chemistry), Enthalpy, Exothermic reaction, Chemistry, Aqueous solution, Nuclear chemistry

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