About: Fractionation of 137Cs and Pu in natural peatland

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	High Cs-137 concentrations in plants growing on peatland inspired us to investigate the quantity of its bioavailable fraction in natural peat. Our investigation aims to: a) estimate the quantity of bioavailable Cs-137 and Pu present in peat, b) verify the similarity of Cs-137 and K-40 behaviours, and c) perform a quantification of Cs-137 and Pu transfer from peat to plants. We analysed the vertical distribution of Cs-137 and Pu isotopes in the peat and their concentrations in plants growing on these places. Bioavailability of radionuclides was investigated by sequential extraction. Sequential analyses revealed that it was the upper layer which contained the majority of Cs-137 in an available form while deeper layers retained Cs-137 in immobile fractions. We can conclude that 18% of all Cs-137 in the peat is still bioavailable. Despite of the low quantity of bioavailable fraction of Cs-137 its transfer factor reached extremely high values. In the case of Pu, 64% of its total amount was associated with fulvic/humic acids which resulted in the high transfer factor from peat to plants. 27 years after the Chernobyl nuclear accident, the significant part of radionuclides deposited in peatland is still bioavailable. High Cs-137 concentrations in plants growing on peatland inspired us to investigate the quantity of its bioavailable fraction in natural peat. Our investigation aims to: a) estimate the quantity of bioavailable Cs-137 and Pu present in peat, b) verify the similarity of Cs-137 and K-40 behaviours, and c) perform a quantification of Cs-137 and Pu transfer from peat to plants. We analysed the vertical distribution of Cs-137 and Pu isotopes in the peat and their concentrations in plants growing on these places. Bioavailability of radionuclides was investigated by sequential extraction. Sequential analyses revealed that it was the upper layer which contained the majority of Cs-137 in an available form while deeper layers retained Cs-137 in immobile fractions. We can conclude that 18% of all Cs-137 in the peat is still bioavailable. Despite of the low quantity of bioavailable fraction of Cs-137 its transfer factor reached extremely high values. In the case of Pu, 64% of its total amount was associated with fulvic/humic acids which resulted in the high transfer factor from peat to plants. 27 years after the Chernobyl nuclear accident, the significant part of radionuclides deposited in peatland is still bioavailable. (en)
Title	Fractionation of 137Cs and Pu in natural peatland Fractionation of 137Cs and Pu in natural peatland (en)
skos:prefLabel	Fractionation of 137Cs and Pu in natural peatland Fractionation of 137Cs and Pu in natural peatland (en)
skos:notation	RIV/86652052:_____/14:#0000265!RIV15-MV0-86652052
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(VG20122015100)
http://linked.open...iv/cisloPeriodika	August
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Henych, Ondřej Ježková, Tereza Mihalík, Ján Hölgye, Zoltán Bartusková, Miluše
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Státní ústav radiační ochrany, v.v.i.
http://linked.open...dnocenehoVysledku	17395
http://linked.open...ai/riv/idVysledku	RIV/86652052:_____/14:#0000265
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	peatland; Cs-137; bioavailability (en)
http://linked.open.../riv/klicoveSlovo	Cs-137 peatland bioavailability
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[D1E2B1CEFB4C]
http://linked.open...i/riv/nazevZdroje	Journal of Environmental Radioactivity
http://linked.open...in/vavai/riv/obor	DL
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	The minimalizing impact of radiologicalcontamination on the landscape in an emergency zone of the NPP Temelin
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	134
http://linked.open...iv/tvurceVysledku	Mihalík, Ján Bartusková, Miluše Henych, Ondřej Hőlgye, Zoltán Ježková, Tereza
http://linked.open...ain/vavai/riv/wos	000337555000003
issn	0265-931X
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jenvrad.2014.02.015

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