Validity of using modified capillary column with larger diameter to study the Cs diffusion in local Taiwan laterite

Tsing-Hai Wang; Wen-Chun Yeh; Shih-Chin Tsai; Yi-Lin Jan; Shi-Ping Teng

doi:10.1007/s10967-007-7159-2

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 277: Issue 3

Validity of using modified capillary column with larger diameter to study the Cs diffusion in local Taiwan laterite

Authors:

Tsing-Hai Wang

Tsing-Hai Wang

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Wen-Chun Yeh

Wen-Chun Yeh National Tsing Hua University Nuclear Science and Technology Development Center Hsinchu 300 Taiwan ROC

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Shih-Chin Tsai

Shih-Chin Tsai National Tsing Hua University Nuclear Science and Technology Development Center Hsinchu 300 Taiwan ROC

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Yi-Lin Jan

Yi-Lin Jan Ching Yun University Department of Civil Engineering Jungli 320 Taiwan ROC

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Shi-Ping Teng

Shi-Ping Teng National Tsing Hua University Department of Engineering and System Science Hsinchu 300 Taiwan ROC

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Pages:: 607–612

Online Publication Date:: 18 Apr 2008

Publication Date:: 01 Sep 2008

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-007-7159-2

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Abstract

We have examined the working diameter of capillary columns with diameter of 5, 7, 10 and 20 mm. These modified capillary columns were carefully filled with local Taiwan laterite (LTL). The porosity and density of these packed columns was 0.51±0.02 g/g and 1.27±0.05 g/cm³, respectively. The diffusion experiments were then carried out in synthetic groundwater with Cs loading of 0.1mM at room temperature. Experimental results have shown that the diffusion profiles of modified capillary columns fit Fick’s second law very well. This result revealed that the working diameter of a capillary column can be expanded to at least to 20 mm without affecting the validity of the derived diffusion coefficients. Among these columns, the ones with 5 mm diameter show the most consistent results of the derived K_d, apparent and effective diffusion coefficients. Although the derived distribution and effective diffusion coefficients slightly decrease as the diameter of these columns increases due to the increase of the solid/liquid ratio. These values are still informative of the Cs diffusion in local Taiwan laterite. Moreover, our results clearly demonstrate the potential of using “modified capillary method” to study the diffusion behaviors of concerned radionuclide because columns with large diameter enable the filling with more versatile geological substances.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)