Article
Licensed
Unlicensed
Requires Authentication
Thermodynamic study of metal silicate complexation in perchlorate media
-
P.N. Pathak
Published/Copyright:
September 25, 2009
Summary
The thermodynamic parameters of formation of the o-silicate complexes of UO22+, Cm3+ and Eu3+ have been measured in the temperature range 5−45 °C in an aqueous medium of 0.20 M NaClO4) ionic strength. Solvent extraction with bis(2-ethylhexyl) phosphoric acid (HDEHP) was used to measure the stability constant (log β1) values of the silicate complexes as a function of temperature to obtain the enthalpies and entropies of complexation. The complexation reactions are entropy driven and opposed by the enthalpy. These thermodynamic values are consistent with the formation of an inner sphere complex.
Keywords: Thermodynamics; Silicate; Complexation; Stability constant; Solvent extraction; Lanthanide; Actinide
Received: 2005-6-8
Accepted: 2005-8-18
Published Online: 2009-9-25
Published in Print: 2006-2-1
© Oldenbourg Wissenschaftsverlag, München
You are currently not able to access this content.
You are currently not able to access this content.
Articles in the same Issue
- Measurement of fission neutron spectrum averaged cross sections of some threshold reactions on zinc: small-scale production of no-carrier-added 64Cu in a nuclear reactor
- Interaction of neptunium(V) with picolinic, nicotinic and isonicotinic acids
- Soil-to-fungi transfer of 90Sr, 239+240Pu, and 241Am
- Thermodynamic study of metal silicate complexation in perchlorate media
- Sorption of radionuclides from complexone solutions in liquid CO2
- Photochemical behaviour of Tc2OCl104– and TcnOy4n–2y+ in chloride media
- Effect of pH and fulvic acid on sorption and complexation of cobalt onto bare and FA bound MX-80 bentonite
- Inhibiting radiolysis of BTP molecules by addition of nitrobenzene
- Concentration of 99mTc-pertechnetate and 188Re-perrhenate
- Preparation of [61Cu]pyruvaldehyde-bis (N4-methylthiosemicarbazone) complex as a possible PET radiopharmaceutical
- Syntheses of two potential dopamine D4 receptor radioligands: 18F labelled chromeno[3,4-c]pyridin-5-ones
Keywords for this article
Thermodynamics;
Silicate;
Complexation;
Stability constant;
Solvent extraction;
Lanthanide;
Actinide
Articles in the same Issue
- Measurement of fission neutron spectrum averaged cross sections of some threshold reactions on zinc: small-scale production of no-carrier-added 64Cu in a nuclear reactor
- Interaction of neptunium(V) with picolinic, nicotinic and isonicotinic acids
- Soil-to-fungi transfer of 90Sr, 239+240Pu, and 241Am
- Thermodynamic study of metal silicate complexation in perchlorate media
- Sorption of radionuclides from complexone solutions in liquid CO2
- Photochemical behaviour of Tc2OCl104– and TcnOy4n–2y+ in chloride media
- Effect of pH and fulvic acid on sorption and complexation of cobalt onto bare and FA bound MX-80 bentonite
- Inhibiting radiolysis of BTP molecules by addition of nitrobenzene
- Concentration of 99mTc-pertechnetate and 188Re-perrhenate
- Preparation of [61Cu]pyruvaldehyde-bis (N4-methylthiosemicarbazone) complex as a possible PET radiopharmaceutical
- Syntheses of two potential dopamine D4 receptor radioligands: 18F labelled chromeno[3,4-c]pyridin-5-ones
