Reduction of Crop Contamination by Soil Resuspension within the 30-km Zone of the Chernobyl Nuclear Power Plant
| Autor: | Yuri Ivanov, Teresa Sauras-Yera, Ramon Vallejo, T G Hinton, Gemma Rauret, J. Tent |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Radioactive Fallout
Avena Field experiment Environmental engineering Biological Availability Cesium Agriculture General Chemistry Vegetation Contamination Soil contamination Crop Agronomy Cesium Radioisotopes Radioactive contamination Soil Pollutants Radioactive Environmental Chemistry Environmental science Tissue Distribution Soil Pollutants Environmental Pollution Radioactive Hazard Release Ukraine Mulch Power Plants |
| Zdroj: | Environmental Science & Technology. 37:4592-4596 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/es026377h |
| Popis: | A field experiment was conducted within the 30-km zone of the Chernobyl Nuclear Power Plant to analyze whether the application of mulching reduced resuspension of 137Cs contaminated soil in oat (Avena sativa) crops. In 1993, we applied a mulch treatment at a dose of 200 g m(-2), and soil resuspension was measured by estimating soil loadings onto plant surfaces from Ti concentrations in plants. In 1994, two mulch doses were applied, 200 and 50 g m(-2), and we estimated the contribution of soil resuspension by using artificial resuspension collection devices (ARC). In the 1993 experiment between 4.6 and 34.4% of the plant's total 137Cs contamination was attributed to external soil contamination. The mean amount of soil-derived 137Cs attached to vegetation was 124.7 Bq kg(-1)(plant) in control plots and 53.7 Bq kg(-1)(plant) in mulched plots. In the 1994 experiment, covering the soil with a mulch layer decreased the radiocesium content in ARC by about 70%. Results obtained in these experiments suggest that soil resuspension was a significant mechanism for plant contamination and that mulching was effective in reducing that contamination. |
| Databáze: | OpenAIRE |
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