Biokinetics of yttrium and comparison with its geochemical twin holmium

Leggett, Rich

doi:10.1088/1361-6498/aa6e66

Title: Biokinetics of yttrium and comparison with its geochemical twin holmium

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Abstract

The transition metal yttrium (Y, atomic number 39) is chemically similar to elements in the lanthanide family (atomic numbers 57-71, lanthanum through lutetium) and is always present with the lanthanides in rare earth ores. Yttrium and the lanthanide holmium are particularly close chemical and physical analogues and are referred to as geochemical twins because they typically show little fractionation in geological material. Extensive measurements on rocks, soils, and meteorites indicate that the Y/Ho mass concentration ratio rarely falls far from the “chondritic” or “solar system” ratio of ~26. Our paper presents a new biokinetic model for yttrium in adult humans and examines whether yttrium and holmium may be biological as well as geochemical twins. Collected data on yttrium and holmium in plants and human tissues do not allow precise derivations of Y/Ho concentration ratios but with occasional exceptions yield ratios that are reasonably consistent with chondritic values. Predictions of the time-dependent behavior of yttrium in adult humans based on the yttrium model presented here closely approximate predictions of the behavior of holmium based on a previously developed model for holmium. We know that yttrium and holmium are close biological analogues, but the available comparative data are too limited and imprecisemore »« less

Authors:

Leggett, Rich ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division

Publication Date:: 2017-06-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1394185

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Radiological Protection

Additional Journal Information:: Journal Volume: 37; Journal Issue: 2; Journal ID: ISSN 0952-4746

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 61 RADIATION PROTECTION AND DOSIMETRY; yttrium; holmium; biokinetics; model; geochemical twins

Citation Formats


                    Leggett, Rich. Biokinetics of yttrium and comparison with its geochemical twin holmium.  United States: N. p., 2017. 
Web.  doi:10.1088/1361-6498/aa6e66.

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                    Leggett, Rich. Biokinetics of yttrium and comparison with its geochemical twin holmium.  United States.  https://doi.org/10.1088/1361-6498/aa6e66

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                    Leggett, Rich. Thu .  
"Biokinetics of yttrium and comparison with its geochemical twin holmium".  United States.  https://doi.org/10.1088/1361-6498/aa6e66.  https://www.osti.gov/servlets/purl/1394185.

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@article{osti_1394185,

  title        = {Biokinetics of yttrium and comparison with its geochemical twin holmium},

  author       = {Leggett, Rich},

  abstractNote = {The transition metal yttrium (Y, atomic number 39) is chemically similar to elements in the lanthanide family (atomic numbers 57-71, lanthanum through lutetium) and is always present with the lanthanides in rare earth ores. Yttrium and the lanthanide holmium are particularly close chemical and physical analogues and are referred to as geochemical twins because they typically show little fractionation in geological material. Extensive measurements on rocks, soils, and meteorites indicate that the Y/Ho mass concentration ratio rarely falls far from the “chondritic” or “solar system” ratio of ~26. Our paper presents a new biokinetic model for yttrium in adult humans and examines whether yttrium and holmium may be biological as well as geochemical twins. Collected data on yttrium and holmium in plants and human tissues do not allow precise derivations of Y/Ho concentration ratios but with occasional exceptions yield ratios that are reasonably consistent with chondritic values. Predictions of the time-dependent behavior of yttrium in adult humans based on the yttrium model presented here closely approximate predictions of the behavior of holmium based on a previously developed model for holmium. We know that yttrium and holmium are close biological analogues, but the available comparative data are too limited and imprecise to reveal whether there are any significant differences in their biological behavior.},

  doi          = {10.1088/1361-6498/aa6e66},

  journal      = {Journal of Radiological Protection},

  number       = 2,

  volume       = 37,

  place        = {United States},

  year         = {2017},

  month        = {6}

}

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