Method of diffusive gradients in thin films (DGT) compared with other soil testing methods to predict phytoavailability of uranium and selected heavy metals from multipolluted soils
| Autor: | Hildegarde Vandenhove, M. V. Hees, Lise Duquène, Jean Wannijn |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
inorganic chemicals
Soil test Renewable Energy Sustainability and the Environment Health Toxicology and Mutagenesis Extraction (chemistry) technology industry and agriculture Public Health Environmental and Occupational Health chemistry.chemical_element Uranium Contamination complex mixtures Diffusive gradients in thin films Bioavailability Pore water pressure Nuclear Energy and Engineering chemistry Environmental chemistry Soil water Safety Risk Reliability and Quality Waste Management and Disposal |
| Zdroj: | Radioprotection. 44:493-498 |
| ISSN: | 1769-700X 0033-8451 |
| DOI: | 10.1051/radiopro/20095091 |
| Popis: | The measurement of diffusive gradients in thin films (DGT) has been proposed as a surrogate for metal uptake by plants. A small-scale experiment was performed to test the predictive capacity of the DGT method with respect to uranium and heavy metal availability and uptake by ryegrass. Correlation analysis was performed to compare the results obtained with the DGT device with more conventional bioavailability indices: concentration in pore water or in selective extractants. Six soils with different histories of uranium contamination and with distinct soil characteristics were screened. For uranium, the bioavailability indices evaluated were highly correlated, indicating that uranium pools assessed were at least partially comparable. For heavy metals, bioavailability indices were hardly correlated. Uranium concentration in the pore water was a better predictor for uranium uptake than amount recovered following selective extraction. The concentration measured with DGT (CDGT ) was also highly correlated with plant uptake. However, the significance level was sensitive to the value of the diffusion coefficient (pH dependent or not) used to calculate CDGT . For the heavy metals screened, only in the case of Cd was uptake predicted by CDGT . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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