Characterization and complexation of humic acids

European Commission Directorate-General For The Information Society And Media Directorate-General For Research And Innovation

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Nuclear energy and safety

Informations

• Publié par: EUROPEAN-COMMISSION-DIRECTORATE-GENERAL-FOR-THE-INFORMATION-SOCIETY-AND-MEDIA-DI
• Nombre de lectures: 27
• Langue: English
• Poids de l'ouvrage: 2 Mo

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* *
Commission of the European Communities
Characterization and complexation
of humic acids
Report
EUR 13181 EN Commission of the European Communities
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Characterization and complexation
of humic acids
J.I. Kim, G. Buckau, R. Klenze, D.S. Rhee, H. Wimmer
Technische Universität München
Institut für Radiochemie
D-W-8046 Garching
Final report
Part 1 'Complexation'
Work carried out under cost-sharing contract No FI1W/0067-D with the European Atomic Energy
Community in the framework of its third R&D programme on 'Management and storage of radioactive
waste', Part A, Task 4, 'Geological disposal studies'
Directorate-General
Science, Research and Development
1991 EUR 13181 EN 75309 ft*»û Published by the
COMMISSION OF THE EUROPEAN COMMUNITIES
Directorate-General
Telecommunications, Information Industries and Innovation
L-2920 Luxembourg
LEGAL NOTICE
Neither the Commission of the European Communities nor any person
acting on behalf of the Commission is responsible for the use which might
be made of the following information
Cataloguing data can be found at the end of this publication
Luxembourg: Office for Official Publications of the European Communities, 1991
ISBN 92-826-2221-5 Catalogue number: CD-NA-13181-EN-C
© ECSC-EEC-EAEC, Brussels • Luxembourg, 1991
Printed in Luxembourg CHARACTERIZATION AND COMPLEXATION OF HUMIC ACID
Institut für Radiochemie, TU München, 804 6 Garching
F.R. Germany
Content Page
PART 1
Characterization of Reference and Site
Specific Humic Acids
J.I. Kim and G. Buckau
61
PART 2
Complexation of Americium and Curium
with Humic Acid
J.I. Kim, G. Buckau, D.S. Rhee,
H. Wimmer and R. Klenze PART 1
CHARACTERIZATION OF REFERENCE AND
SITE SPECIFIC HUMIC ACIDS
J.I. Kim and G. Buckau
Institut für Radiochemie, TU München, 804 6 Garching
F.R. Germany
The characterization of selected humic and fulvic acids
have been carried out for their elemental compositions,
inorganic impurities, spectroscopic properties, size dis­
tributions and proton exchange capacities. A commercial
humic acid (Na salt) from Aldrich Co. is purified to a
protonated form and used as a reference material. Humic
and fulvic acids extracted and purified from Gorleben
(FRG) , and Boom Clay (B) groundwaters together with the
same acids from Fanay Augeres (F) groundwater are taken as
site specific materials. The results of characterization
provide basic knowledge supporting the subsequent study of
complexation of actinides and fission products with humic
and fulvic acids and their migration processes in the
geosphere.
-V PART 1
Content Page
1 Introduction 1
2 Preparation of reference and site specific 5
humic acids
3 Characterization of humic and fulvic acid 6
3.1 Moisture content 6
3.2 Elemental composition 9
3.3 Major inorganic impurities 13
3.4 Trace impurities 15
3.5 Spectroscopic characteristics8
3.5.1 E4/E6 ratio
3.5.2 IR spectroscopy9
3.5.3 NMRy 31
3.6 Size distribution2
3.6.1 Gel permeation chromatography
3.6.2 Ultrafiltration 4
3.7 Proton exchange capacity5
3.7.1 Total proton exchange capacity 4
3.7.2 Carboxylic group capacity
3.7.3 Phenolic groupy6
3.7.4 Direct titration7
5 Summary discussion 54
References
-VII