A consistent phenomenological model for natural organic matter linked migration of Tc(IV), Cm(III), Np(IV), Pu(III/IV) and Pa(V) in the Boom Clay

2011 ◽  
Vol 36 (17-18) ◽  
pp. 1590-1599 ◽  
Author(s):  
N. Maes ◽  
C. Bruggeman ◽  
J. Govaerts ◽  
E. Martens ◽  
S. Salah ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Phenomenological Model ◽  
Boom Clay

Modelling Transport of 14 C-Labelled Natural Organic Matter (NOM) in Boom Clay

2008 ◽  
Vol 1107 ◽  
Author(s):  
Alice Ionescu ◽  
Norbert Maes ◽  
Dirk Mallants
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Water Movement ◽  
Numerical Code ◽  
Migration Behavior ◽  
Colloidal Transport ◽  
Boom Clay ◽  
Kinetically Controlled ◽  
Clay Formation ◽  
Hydrus 1D

AbstractIn Belgium, the Boom Clay formation is considered to be the reference formation for HLW disposal R&D. Assessments to date have shown that the host clay layer is a very efficient barrier for the containment of the disposed radionuclides. Due to absence of significant water movement), diffusion - the dominant transport mechanism, combined with generally high retardation of radionuclides, leads to extremely slow radionuclide migration. However, trivalent lanthanides and actinides form easily complexes with the fulvic and humic acids which occur in Boom Clay and in its interstitial water. Colloidal transport may possibly result in enhanced radionuclide mobility, therefore the mechanisms of colloidal transport must be better understood. Numerical modeling of colloidal facilitated radionuclide transport is regarded an important means for evaluating its importance for long-term safety.The paper presents results from modeling experimental data obtained in the framework of the EC TRANCOM-II project, and addresses the migration behavior of relevant radionuclides in a reducing clay environment, with special emphasis on the role of the Natural Organic Matter (NOM) [1]. Percolation type experiments, using stable 14C-labelled NOM, have been interpreted by means of the numerical code HYDRUS-1D [2]. Tracer solution collected at regular intervals was used for inverse modeling with the HYDRUS-1D numerical code to identify the most likely migration processes and the associated parameters. Typical colloid transport submodels tested included kinetically controlled attachment/detachment and kinetically controlled straining and liberation.

scholarly journals Complexation of Sn with Boom Clay Natural Organic Matter and its effect on Sn sorption onto Illite, Montmorillonite and Boom Clay

2021 ◽  
Author(s):  
Delphine Durce ◽  
Sonia Salah ◽  
Norbert Maes ◽  
Lian Wang ◽  
Stéphane Brassinnes
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Boom Clay

The role of natural organic matter in the migration behaviour of americium in the Boom Clay – Part I: Migration experiments

2006 ◽  
Vol 31 (10-14) ◽  
pp. 541-547 ◽  
Author(s):  
Norbert Maes ◽  
Lian Wang ◽  
Tim Hicks ◽  
David Bennett ◽  
Peter Warwick ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Boom Clay ◽  
Migration Behaviour

Modelling of a large-scale in-situ migration experiment with 14C-labelled natural organic matter in Boom Clay

2010 ◽  
Vol 98 (9-11) ◽  
Author(s):  
E. Martens ◽  
Norbert Maes ◽  
E. Weetjens ◽  
M. Van Gompel ◽  
L. Van Ravestyn
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Large Scale ◽  
Boom Clay ◽  
Migration Experiment

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

Characterization and isolation of natural organic matter from a eutrophic reservoir

2000 ◽  
Vol 49 (5) ◽  
pp. 269-280 ◽  
Author(s):  
Cheng-Nan Chang ◽  
Ying-Shih Ma ◽  
Guor-Cheng Fang ◽  
Fang-Fong Zing
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Eutrophic Reservoir
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