Deposition of gamma emitters from Chernobyl accident and their transfer in lichen–soil columns

Lehto, Jukka; Paatero, Jussi; Pehrman, Reijo; Kulmala, S.; Suksi, Juhani; Koivula, Teija; Jaakkola, T.

doi:10.1016/j.jenvrad.2008.05.003

Cited by 17 publications

(7 citation statements)

References 18 publications

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“…The deposition patterns resembled those of the Chernobyl-released non-volatile radionuclides, e.g. transuranium nuclides, 95 Zr, and cerium isotopes (Arvela et al, 1990;Reponen et al, 1993;Paatero et al, 1994bPaatero et al, , 2007Salminen et al, 2005;Lehto et al, 2008). From the 90 Sr deposition results of 1986, on average 156 Bq m À2 , and the total area of Finland, 338 000 km 2 , it can be calculated that the deposition of Chernobyl-derived 90 Sr in Finland was about 5.3 Â 10 13 Bq.…”

Section: Chernobyl-originated 8990 Sr Depositionmentioning

confidence: 56%

Overview of strontium-89,90 deposition measurements in Finland 1963–2005

Paatero

Saxén

Buyukay

et al. 2010

Journal of Environmental Radioactivity

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Section: Chernobyl-originated 8990 Sr Depositionmentioning

confidence: 56%

Overview of strontium-89,90 deposition measurements in Finland 1963–2005

Paatero

Saxén

Buyukay

et al. 2010

Journal of Environmental Radioactivity

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“…A report presented by Mitchell et al (1998) of different radionuclides such as curium (Cm) detected in soil and in lichens excluded, however, the relevant data of lichen identity and substrate. Several studies dealt with radionuclides in epigeic lichens providing forage, and in soil, in Nordic countries (Varskog et al 1994;Pálsson et al 1994;Outola et al 2003;Skuterud et al 2005;Dowdall et al 2005;Korobova et al 2007;Lehto et al 2008).…”

Section: The Chernobyl Accidentmentioning

confidence: 99%

“…A relatively efficient collector of deposition, C. delisei apparently accumulated higher concentrations of 137 Cs. Lehto et al (2008) used epigeic lichens to analyze the activity of radionuclides in lichensoil columns in order to determine the transfer of radionuclides from lichen to soil and from the organic soil layer to the rock surface in order to predict the performance of radionuclides in lichen carpets. This information was needed to determine, for example, the period of time at which the lichen is representative of total deposition values.…”

Section: The Chernobyl Accidentmentioning

confidence: 99%

Lichens and Particulate Matter: Inter-relations and Biomonitoring with Lichens

Garty

Garty-Spitz

2014

Recent Advances in Lichenology

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“…The reasons could be the washing out of the radionuclide from roofs and tree stems or aeolian redistribution [8]. However, the majority of authors reported declining time trends of the radiocesium content in various epigeic, epiphytic and epilitic lichens (e.g., [19,20,21,22]). The removal of cesium radioisotopes from lichen occurs both due to physical (radioactive) decay (decay constant λ phys ) and by biological elimination processes characterized by rate constant λ bio [23].…”

Section: научные статьиmentioning

confidence: 99%

Temporal variations of 7Be, 40K, 134Cs and 137Cs in epiphytic lichens (genus Usnea) at the Sakhalin and Kunashir islands after the Fukushima accident

Рамзаев¹,

Barkovsky²,

Громов³

et al. 2016

Radiac. gig. (2008)

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Temporal variations of radionuclide levels in the epiphytic Usnea sp. lichens from the two islands Sakhalin and Kunashir, the Sakhalin region, Russia have been evaluated using the already published (2011)(2012)(2013) and new experimental data (2015). A total of 62 lichen samples were measured using high purity germanium γ-ray detectors and multichannel analyzers. In the period 2011-2015, activity concentrations of the anthropogenic radionuclides 134 Cs and 137 Cs and the natural radionuclides 7 Be and 40 K were found to be in the range of (<0.53)-41. 3, 0.55-50.6, 99-603 and 35-95 Bq kg -1 on dry weight, respectively. The activity concentrations of 134 Cs and 137 Cs in lichens were statistically significantly higher at Kunashir than at Sakhalin. The present-day levels of radiocesium activity concentrations in lichens are low: < 6 Bq kg -1 for 137 Cs and <1 Bq kg -1 for 134 Cs. A decline in the annual median 137 Cs activity concentrations in lichens from 2011 to 2015 corresponds to a biological half-life of 1.2 y for Kunashir and 1.1 y for Sakhalin. The activity concentrations of 137 Cs and 134 Cs in lichens were strongly correlated (r=0.978, P<0.01) and the 134 Cs biological half-life value of 1.2 y in the period 2011-2013 was similar to the corresponding 137 Cs biological half-life value. The soil-tolichens aggregated transfer factor, T ag , for 134 Cs at time t=0 after the Fukushima accident is calculated as 0.56 m 2 kg -1 at Sakhalin and 0.31 m 2 kg -1 at Kunashir. In contrast to radiocesium, the natural radionuclides 7 Be and 40 K did not show clear time-dependent variations in the Usnea lichens. No correlation was found between 7 Be and 40 K as well as between 40 K and cesium radioisotopes. However, positive and statistically significant (P<0.05) correlations were obtained between 7 Be and cesium radioisotopes. High abundance of the Usnea sp. lichens in the study area and large values of T ag for radiocesium in the lichens make these organisms suitable candidates for detection of low levels of airborne radioactive contamination of the environment.

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Deposition of gamma emitters from Chernobyl accident and their transfer in lichen–soil columns

Cited by 17 publications

References 18 publications

Overview of strontium-89,90 deposition measurements in Finland 1963–2005

Overview of strontium-89,90 deposition measurements in Finland 1963–2005

Lichens and Particulate Matter: Inter-relations and Biomonitoring with Lichens

Temporal variations of 7Be, 40K, 134Cs and 137Cs in epiphytic lichens (genus Usnea) at the Sakhalin and Kunashir islands after the Fukushima accident

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