Download e-book for kindle: Chemical Thermodynamics Chemical Thermodynamics of Solid by nuclear energy agency

By nuclear energy agency

ISBN-10: 926402655X

ISBN-13: 9789264026551

This quantity offers a state of the art file at the modelling of aqueous-solid resolution structures via the mixed use of chemical thermodynamics and experimental and computational ideas. those structures are ubiquitous in nature and hence intrinsic to the certainty and quantification of radionuclide containment and retardation tactics found in geological repositories of radioactive waste. consultant instances for examine were selected from the radioactive waste literature to demonstrate the appliance of some of the ways. This document has been ready through a workforce of 4 major specialists within the box lower than the auspices of the OECD/NEA Thermochemical Database (TDB) undertaking. desk of content material : half I. prolonged precis -Introduction: Scope, pursuits and the Audiene of instructions -Definitions -From Aqueous to strong suggestions -Basic Thermodynamics of reliable ideas -Experimental and Analystical facets -Testing the Aq-SS options and strategies in Nuclear Waste administration suitable platforms -Report Conclusions half II. concept, Experimental points and instances for examine -Theoretical Asptcts of reliable recommendations and their Solubility -Experimental and Analytical points -Cases of particular curiosity in suitable platforms Bibliography

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Extra resources for Chemical Thermodynamics Chemical Thermodynamics of Solid Solutions of Interest in Radioactive Waste Management

Example text

6 Testing the Aq-SS concepts and methods in nuclear waste management relevant systems One of the main objectives of this work is to determine to which extent the current status of the thermodynamics of Aq-SS can be integrated in the models and sub-models used in the Performance Assessment of nuclear waste repositories. 3. What follows is a summary of the cases and their main findings. 1 Radium and its incorporation into the barite solid solution family: environmental implications The radium-barite relationship in natural and anthropogenic environments Perhaps, the co-precipitation between radium isotopes and barite precipitates is one of the best known examples.

The modelling results have not been directly verified by spectroscopy although they are consistent with recent TRFLS observations. 5 Conclusions There is a large body of macroscopic chemical data regarding the sorption of lanthanide and trivalent actinide elements into calcite. The spectroscopic data so far available would indicate that trivalent lanthanides and actinides are incorporated into the calcite structure and in two different forms. However, there is no consensus about the precise substitution mechanisms involved.

The answer depends on the objectives of the study and on the range of concentrations of interest. , dolomite in (Ca,Mg)CO3 system) and/or miscibility gaps due to exsolution. Inside of the miscibility gap, at least two solid solution phases with different fixed compositions coexist with the aqueous electrolyte, composition of which is also fixed. Any change in the bulk composition of the Aq-SS system will result upon equilibration only in changed masses of solid phases but in unchanged concentrations of all end-members and aqueous species.

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Chemical Thermodynamics Chemical Thermodynamics of Solid Solutions of Interest in Radioactive Waste Management by nuclear energy agency

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