Plant uptake of radiocesium from contaminated soil

• Autorzy: Pipíška M. , Lesný J. , Hornik M. , Augustín J.
• Konferencja: Proceedings of the International Conference Bioaccumulation of Radionuclides and Heavy Metals - as a Marker of Environmental Contamination, Kazimierz Dolny upon Vistula, Poland, September 26-28, 2004
• Języki publikacji: EN

Abstrakty

EN

Phytoextraction field experiments were conducted on soil contaminated with radiocesium to determine the capacity of autochthonous grasses and weeds to accumulate 137Cs. The aim of the study was to evaluate the potential of spontaneously growing vegetation as a tool for decontamination of non-agricultural contaminated land. As a test field, the closed monitored area of the radioactive wastewater treatment plant of the Nuclear Power Plant in Jaslovské Bohunice, Slovakia was used. Contamination was irregularly distributed from the level of background to spots with maximal activity up to 900 Bq/g soil. Sequential extraction analysis of soil samples showed the following extractability of radiocesium (as percent of the total): water < 0.01%; 1 M MgCl2 = 0.3-1.1%; 1 M CH3COONa = 0.3-0.9%; 0.04 M NH4Cl (in 25% CH3COOH) = 0.9-1.4%; and 30% H2O2 - 0.02 M HNO3 = 4.5-9.0%. Specific radioactivity of the most efficiently bioaccumulating plant species did not exceed 4.0 kBq kg 1 (dry weight biomass). These correspond to the soil-to-plant transfer factor (TF) values up to 44.4 × 10 4 (Bq kg 1 crop, d.w.)/(Bq kg 1 soil, d.w.). Aggregated transfer factor (Tag) of the average sample of the whole crop harvested from defined area was 0.5 × 10 5 (Bq kg 1 d.w. crop)/(Bq m 2 soil). It can be concluded that low mobility of radiocesium in analysed soil type, confirmed by sequential extraction analyses, is the main hindrance for practical application of autochthonous plants as a phytoremediation tool for aged contaminated area of non-cultivated sites. Plant cover can efficiently serve only as a soil surface-stabilising layer, mitigating the migration of radiocesium into the surrounding environment.

Słowa kluczowe

EN

radiocesium; soil contamination; plant uptake; sequential extraction; case study

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2004
• Tom: Vol. 49,suppl.1
• Strony: 9--11
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Pipíška M.

• Department of Biotechnology, Faculty of Natural Sciences, University of SS. Cyril and Methodius, 2 Nam. J. Herdu Str., 917 01 Trnava, Slovak Republic, Tel./Fax: [phone]

autor

Lesný J.

• Department of Biotechnology, Faculty of Natural Sciences, University of SS. Cyril and Methodius, 2 Nam. J. Herdu Str., 917 01 Trnava, Slovak Republic, Tel./Fax: [phone]

autor

Hornik M.

• Department of Biotechnology, Faculty of Natural Sciences, University of SS. Cyril and Methodius, 2 Nam. J. Herdu Str., 917 01 Trnava, Slovak Republic, Tel./Fax: [phone]

autor

Augustín J.

• Department of Biotechnology, Faculty of Natural Sciences, University of SS. Cyril and Methodius, 2 Nam. J. Herdu Str., 917 01 Trnava, Slovak Republic, Tel./Fax: [phone]

Bibliografia

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