التفاصيل البيبلوغرافية
| العنوان: |
A Statistical Evaluation to Compare and Analyze Estimations of the Diffusion Coefficient of Pertechnetate (99TcO4−) in Compacted Bentonite |
| المؤلفون: |
Chuan-Pin Lee, Yanqin Hu, Dongyang Chen, Neng-Chuan Tien, Shih-Chin Tsai, Yunfeng Shi, I-Hsien Lee, Chuen-Fa Ni |
| المصدر: |
Minerals; Volume 11; Issue 10; Pages: 1075 |
| بيانات النشر: |
Multidisciplinary Digital Publishing Institute |
| سنة النشر: |
2021 |
| المجموعة: |
MDPI Open Access Publishing |
| مصطلحات موضوعية: |
diffusion, MX80 bentonite, HYDRUS-1D, asymptote, ANOVA |
| جغرافية الموضوع: |
agris |
| الوصف: |
Various numerical methods have been being extensively used to estimate the diffusion parameters of pertechnetate (99TcO4−) in compacted MX80 bentonite clay using through-diffusion (TD) techniques. In this study, an improved TD column test was applied, and the diffusion fluxes of tritium (HTO) as a non-reactive radionuclide, and 99TcO4− with various dry densities, were compared under the same experimental conditions. Similar results were obtained for the apparent diffusion coefficients of HTO and 99TcO4− using three estimation methods: a graphical method applying the asymptote calculation, an analytical solution using Lsqcurvefit installed in MATLAB, and the Marquardt–Levenberg optimization algorithm in the HYDRUS-1D inverse method. The statistical analysis showed that the densities using a one-way analysis of variance (ANOVA) for the three estimation methods ranged from 1200 to 2000 kg/m3, which indicated that there were no obvious differences between HTO and 99TcO4−. In general, the diffusion parameters of 99TcO4− were lower than those for HTO due to anion exclusion effects and lower accessible porosity. |
| نوع الوثيقة: |
text |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| Relation: |
Clays and Engineered Mineral Materials; https://dx.doi.org/10.3390/min11101075 |
| DOI: |
10.3390/min11101075 |
| الاتاحة: |
https://doi.org/10.3390/min11101075 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: |
edsbas.2550F35E |
| قاعدة البيانات: |
BASE |