Influence of the physico-chemical properties of Selangor soil series on the distribution coefficient (K d-value) of 226Ra
| Autor: | Zidan Mohamed M. Houmani, Shahidan Radiman, Zaharudin Ahmad, Amran Ab. Majid |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Soil test Chemistry Health Toxicology and Mutagenesis Soil organic matter Public Health Environmental and Occupational Health Stepwise regression Pollution Analytical Chemistry Soil series Nuclear Energy and Engineering TRACER Environmental chemistry Soil water Cation-exchange capacity Radiology Nuclear Medicine and imaging Organic matter Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 285:271-277 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | Ra is a member of the 238 U natural decay series and is one of the most important isotope to be determined among the naturally occurring nuclides in environmental samples. In order to evaluate the radiation dose from 226 Ra, it is important to know its mobility in different types of soils. The aim of the present study is to quantify the influence of physico-chemical soil properties on 226 Ra adsorption. The distribution coefficients (Kd-value) of 226 Ra in Selangor soil series samples were measured in one core, at three depth levels to evaluate the adsorbability of 226 Ra. The soil samples were spiked with 226 Ra tracer and the activities of 226 Ra in the separated phase from batch sorption test were measured by a low background but high efficiency well-type HPGe detector. Several physico-chemical soil properties were also char- acterised for each soil samples. Pearson's correlation and stepwise multiple regression test were applied at the 0.05 level of significance throughout all analysis to determine the relationships and influences between distribution coefficients (Kd-value) of 226 Ra with physicochemical soil properties for the Selangor soil series. The observed Kd value was in the range of 50.55-172.28 mL g -1 (mean: 93.20 ± 46.99 mL g -1 ). The regression showed that the highest positive correlations were observed for organic matter (OM) and cation exchange capacity (CEC) (r = 0.96**, 0.81**, respectively) with Kd-values. The results indicate that the stepwise multiple regression model incorporating the soil's OM and CEC accounts for 98% of the variability in distribution coefficients of 226 Ra. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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