No effect of digestate amendment on Cs-137 and Sr-90 translocation in lysimeter experiments.
Chemosphere
; 172: 310-315, 2017 Apr.
Article
em En
| MEDLINE
| ID: mdl-28086159
ABSTRACT
The soil-plant transfer of Cs-137 and Sr-90 in different crops was determined with respect to the present-day amendment practice of using digestate from biogas fermenters. The studies were performed using large lysimeters filled with undisturbed luvisol monoliths. In contrast to the conservative tracer, Br-, neither of the studied radionuclides showed a significant vertical translocation nor effect of the applied digestate amendment compared to a non-amended control was found. Furthermore, no significant plant uptake was measured for both nuclides in wheat or oat as indicated by the low transfer factors between soil-shoot for Cs-137 (TF 0.001-0.010) and for Sr-90 (0.10-0.51). The transfer into nutritionally relevant plant parts was even lower with transfer factors for soil-grain for Cs-137 (TF 0.000-0.001) and for Sr-90 (0.01-0.06). Hence, the amendment with biogas digestate is unfortunately not an option to further reduce plant uptake of these radionuclides in agricultural crops, but it does not increase plant uptake either.
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Solo
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Poluentes Radioativos do Solo
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Radioisótopos de Estrôncio
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Radioisótopos de Césio
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En
Ano de publicação:
2017
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Article