A sensibility analysis of model selection in modeling the reactive transport of cesium in crushed granite

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doi: 10.1016/S0169-7722(02)00121-3
Authors:Cheng, Hwai-Ping; Li, Ming-Hsu; Li, Samuel
Author Affiliations:Primary:
National Tsing Hua University, Department of Nuclear Science, Hsinchu, Taiwan
Other:
National Central University, Taiwan
Volume Title:8th international conference on Chemistry and migration behaviour of actinides and fission products in the geosphere; Migration '01
Volume Authors:Kim, Jae-Il, editor; Geckeis, Horst
Source:Journal of Contaminant Hydrology, 61(1-4), p.371-385; 8th international conference on Chemistry and migration behaviour of actinides and fission products in the geosphere; Migration '01, Bregenz, Austria, Sept. 16-21, 2001, edited by Jae-Il Kim and Horst Geckeis. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0169-7722
Publication Date:2003
Note:In English. 16 refs.; illus., incl. 5 tables
Summary:We performed a sensibility analysis of model selection in modeling the reactive transport of cesium in crushed granite through model calibration and validation. Based on some solid phase analysis data and kinetic batch experimental results, we hypothesized three two-site sorption models in the LEHGC reactive transport model to fit the breakthrough curves (BTCs) from the corresponding column experiments. The analysis of breakthrough curves shows that both the empirical two-site kinetic linear sorption model and the semi-mechanistic/semi-empirical two-site kinetic surface complexation model, regardless of their complexity, can match our experimental data fairly well under given test conditions. A numerical experiment to further compare the two models shows that they behave differently when the pore velocity is not of the same order of magnitude as our test velocities. This result indicates that further investigations to help determine a better model are needed. We suggest that a multistage column experiment, which tests over the whole range of practical flow velocities, should be conducted to help alleviate inadequate hypothesized models. Abstract Copyright (2003) Elsevier, B.V.
Subjects:Advection; Alkali metals; Aquifer vulnerability; Breakthrough curves; Calibration; Cesium; Complexing; Controls; Experimental studies; Ground water; Kinetics; Mathematical models; Metals; Migration of elements; Models; Numerical models; Radioactive waste; Reactive transport; Reinforced materials; Rock mechanics; Transport; Underground disposal; Waste disposal; Asia; Far East; Taiwan
Record ID:2003043718
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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