Transfer of radionuclides in aquatic ecosystems – Default concentration ratios for aquatic biota in the Erica Tool

Hosseini, A.; Thørring, Håvard; Brown, Justin; Saxén, R; Ilus, E

doi:10.1016/j.jenvrad.2008.01.012

Cited by 122 publications

(110 citation statements)

References 109 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…data for the given radionuclide may be available for a similar organism). In previous studies this case has been handled by using an ordinary (classical) data pooling approach; as used in development of the ERICA Hosseini et al, 2008) and TRS CR databases (Howard et al, in press). This case can also be addressed by combining situation specific data with other relevant data using Bayesian statistics, which provides the focus for this paper.…”

Section: This Issue)mentioning

confidence: 99%

“…Other estimates of the mean and variance are the combined mean and variance which pool data from K multiple data sets (Hosseini et al, 2008):…”

Section: Appendixmentioning

confidence: 99%

“…soil and water, and selected plants and animals. A simple and widely used method to model radionuclide transfer from soil and water to biota is through the application of concentration ratios: CR wo-media 's Hosseini et al, 2008), defined as concentration of a radionuclide in the whole organism divided by the concentration of the same radionuclide in the relevant environmental media, i.e. soil or water.…”

Section: Introductionmentioning

confidence: 99%

“…Brown et al this issue). In this respect, comprehensive compilations of CRs in databases such as those provided in the ERICA Tool Hosseini et al, 2008) and the more recent wildlife transfer database as described by Copplestone et al (this issue) (which has been used to derive an IAEA handbook (Howard et al (in-press)) and ICRP (2009) report) provide a valuable resource.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Application of the Bayesian approach for derivation of PDFs for concentration ratio values

Hosseini

Stenberg

Ávila

et al. 2013

Journal of Environmental Radioactivity

Self Cite

View full text Add to dashboard Cite

Concentration ratios (CRs) are used to derive activity concentrations in wild plants and animals. Usually, compilations of CR values encompass a wide range of element-organism combinations, extracted from different studies with statistical information reported at varying degrees of detail. To produce a more robust estimation of distribution parameters, data from different studies are normally pooled using classical statistical methods. However, there is inherent subjectivity involved in pooling CR data in the sense that there is a tacit assumption that the CRs under any arbitrarily defined biota category belong to the same population. Here, Bayesian inference has been introduced as an alternative way of making estimates of distribution parameters of CRs. This approach, in contrast to classical methods, is more flexible and also allows us to define the various assumptions required, when combining data, in a more explicit manner. Taking selected data from the recently compiled wildlife transfer database (http://www.wildlifetransferdatabase.org/) as a working example, attempts are made to refine the pooling approaches previously used and to consider situations when empirical data are limited.

show abstract

Section: This Issue)mentioning

confidence: 99%

“…Other estimates of the mean and variance are the combined mean and variance which pool data from K multiple data sets (Hosseini et al, 2008):…”

Section: Appendixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of the Bayesian approach for derivation of PDFs for concentration ratio values

Hosseini

Stenberg

Ávila

et al. 2013

Journal of Environmental Radioactivity

Self Cite

View full text Add to dashboard Cite

show abstract

“…Over the past decade, CRwo-soil values have been used in two frequently used, freely available assessment tools: RESRAD Biota (USDOE, 2002(USDOE, , 2004 and the ERICA Tool Beresford et al, 2008;Hosseini et al, 2008). Recently, an online database has been produced (http://www.wildlifetransferdatabase.org/) (Copplestone et al, 2013) which has been used to derive CRwo-soil values by: (i) an IAEA EMRAS II Working Group to produce a handbook of wildlife transfer parameters (Wildlife -TRS) (IAEA, 2013;Howard et al, 2013) and (ii) the ICRP for a report on transfer of radionuclides to selected Reference Animals and Plants (RAPs) (ICRP, 2009) (see below).…”

Section: Introductionmentioning

confidence: 99%

Exploring methods to prioritise concentration ratios when estimating weighted absorbed dose rates to terrestrial Reference Animals and Plants

Howard

Wells

Beresford

et al. 2013

Journal of Environmental Radioactivity

View full text Add to dashboard Cite

The ICRP and IAEA have recently reported Concentration Ratio values (CRwo-mediaequilibrium radionuclide activity concentration in whole organism divided by that in media) for Reference Animals and Plants (RAPs) and a wide range of organism groups, respectively, based on a common online database. Given the large number of data gaps in both publications, there is a need to develop methods for identifying the relative importance of improving currently available CRwo-media values. A simple, transparent approach involving the derivation and comparison of predicted internal and external weighted absorbed dose rates for radionuclides considered by ICRP (2009) for terrestrial RAPs is presented. Using the approach of applying a reference value of CRwo-soil = 1 or using the maximum reported values where CRwo-soil >1, we provisionally identify terrestrial radionuclide RAP combinations which could be considered low priority, notably: Ca, Cr and Ni consistently; Mn for all RAPs except Deer and Pine Tree; and Tc for all RAPs but Wild Grass. Equally, we can systematically identify high priority elements and radioisotopes, which largely, but not exclusively, consist of alpha-emitters (especially isotopes of Ra and Th, but also consistently Am, Cf, Cm, Np, Pa, Po, Pu, U). The analysis highlights the importance of the radiation weighting factor default assumption of 10 for alphaemitters in the ERICA Tool when comparing the magnitude of the internal dose and trying to identify high priority RAP-isotope combinations. If the unweighted Dose Conversion Coefficient (DCC) values are considered, those for alpha-emitters are often one order of magnitude higher than those due to some beta-gamma emitters for terrestrial RAPs, whereas with the radiation weighting factor applied they are two orders of magnitude higher.1.

show abstract

Uranium: Radionuclides

Vandenhove

Hurtgen

Payne

2005

Encyclopedia of Inorganic Chemistry

View full text Add to dashboard Cite

This article describes the occurrence, chemistry, and bioavailability of uranium (U) in terrestrial and aquatic environments, its analysis in environmental samples, and remedial measures applicable to uranium‐contaminated water and soil. Uranium is widely distributed throughout the world. There are three main isotopes present in natural uranium, which comprises 234 U (0.0055%), 235 U (0.72%), and 238 U (99.27%). Uranium can occur either in its reduced state (U(IV)), which is generally highly immobile, or in its more soluble and mobile (U(VI)) state. Uranium mobility and bioavailability are governed by oxidation state, complexation by organic and inorganic ligands, pH, sorption by minerals including clays and hydroxides, and interactions with organic matter. In uncontaminated surface waters uranium content is generally low (<1 ppb). Most groundwaters are low in uranium but the concentration range is large (<0.001–2600 ppb), resulting from the interaction of groundwater with naturally occurring uranium‐bearing materials or anthropogenic contamination sources. Since groundwater is a major source for drinking water, various methods have been developed to remove uranium from potable water. Similar methods are applied in wastewater treatment. Extraction and processing of uranium ore or minerals containing natural radionuclides has resulted in the generation of waste streams. The major challenge associated with these contaminated waste streams, residues, or sites is typically the larger volumes of material and the relatively low specific activities.

show abstract

Transfer of radionuclides in aquatic ecosystems – Default concentration ratios for aquatic biota in the Erica Tool

Cited by 122 publications

References 109 publications

Application of the Bayesian approach for derivation of PDFs for concentration ratio values

Application of the Bayesian approach for derivation of PDFs for concentration ratio values

Exploring methods to prioritise concentration ratios when estimating weighted absorbed dose rates to terrestrial Reference Animals and Plants

Uranium: Radionuclides

Contact Info

Product

Resources

About