کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4434332 | 1619979 | 2006 | 11 صفحه PDF | دانلود رایگان |
The soil solid–liquid distribution coefficient (Kd) value is of great significance in understanding and modelling the environmental behaviour of soil contaminants. For many years, the batch sorption technique has been used for the determination of such values. Here, we propose an alternative ‘mini-column’ approach in which somewhat more realistic soil conditions are maintained. In particular, this approach allows for determination of radionuclide Kd values under realistic soil moisture contents and in a system in which time-dependent processes such as changes in redox potential can take place. Data obtained for radioactive iodine (a key radionuclide in the consideration of radioactive waste disposal) are presented and indicate that soil moisture content, particularly in conjunction with soil redox potential (through water-logging of the soil), has a marked effect on measured Kd values. The results indicate the advantages and potential usefulness of the mini-column approach in assessing the environmental behaviour of radioactive, and other, soil contaminants.
Journal: Science of The Total Environment - Volume 359, Issues 1–3, 15 April 2006, Pages 244–254