Kinetics of 45Ca, 60Co, 210Pb, 54Mn and 109Cd in the tissue of the freshwater bivalve VeZesunio angusi: further development of a predictive and mechanistic model of metal bioaccumulation

Brown, PL; Jeffree, R; Markich, SJ

Kinetics of 45Ca, 60Co, 210Pb, 54Mn and 109Cd in the tissue of the freshwater bivalve VeZesunio angusi: further development of a predictive and mechanistic model of metal bioaccumulation

Brown, PL Jeffree, R Markich, SJ

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Publisher:: Elsevier Inc
Publication Type:: Journal Article
Citation:: The Science of the Total Environment, 1996, 188 pp. 139 - 166
Issue Date:: 1996-01

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Field	Value	Language
dc.contributor.author	Brown, PL	en_US
dc.contributor.author	Jeffree, R	en_US
dc.contributor.author	Markich, SJ	en_US
dc.date.issued	1996-01	en_US
dc.identifier.citation	The Science of the Total Environment, 1996, 188 pp. 139 - 166	en_US
dc.identifier.issn	0048-9697	en_US
dc.identifier.uri	http://hdl.handle.net/10453/14702
dc.description.abstract	Abstract A theoretical and experimental study was performed to determine the kinetics of 45Ca, 6oCo, `Pb, 54Mn and lo9Cd in the whole soft tissue of the unionid bivalve G/elesunio angasi. This investigation further tested the hypothesis, developed previously for the alkaline-earth metals, that the biological half-life of a metal in soft tissue is related to its solubility when deposited in the extracellular granules of the bivalve. This hypothesis was tested for the above radionuclides (tracers of the stable metals) by a comparison of (a) a qualitative a priori prediction of their biological half-lives in bivalve tissue, based on critically evaluated log KS,, values for their respective hydrogen phosphate salts, and calibrated to previous experimentally determined rates of loss for 45Ca and 226Ra, with (b) their empirical biological half-lives that were investigated experimentally using the radionuclides 45Ca, 6oCo, 210Pb, 54Mn and `09Cd. The results of the experimental investigation showed that the mean values calculated for the biological half-lives of 4SCa and 6oCo in the tissue were 106 and 121 days, respectively, but there was no significant (P > 0.05) loss of 20Pb, 54Mn or `Cd from the soft tissue over 160 days, when bivalves were exposed to radionuclide-free water. A chemical model was developed from first principles that quantitatively explains the kinetic mechanisms that underlie the differential rates of loss of divalent metals from the extracellular granules of K angasi. The experimental results were consistent with the predictions of the model; however, some investigational limitations were evident, and these are discussed. The uptake of each radionuclide into the bivalve tissue tended to be linear, but the variation in tissue concentration.	en_US
dc.publisher	Elsevier Inc	en_US
dc.relation.ispartof	The Science of the Total Environment	en_US
dc.relation.isbasedon	10.1016/0048-9697(96)05166-2	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.title	Kinetics of 45Ca, 60Co, 210Pb, 54Mn and 109Cd in the tissue of the freshwater bivalve VeZesunio angusi: further development of a predictive and mechanistic model of metal bioaccumulation	en_US
dc.type	Journal Article
utslib.citation.volume	188	en_US
utslib.for	040608 Surfacewater Hydrology	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access
pubs.consider-herdc	false	en_US
pubs.volume	188	en_US

Abstract:

Abstract A theoretical and experimental study was performed to determine the kinetics of 45Ca, 6oCo, `Pb, 54Mn and lo9Cd in the whole soft tissue of the unionid bivalve G/elesunio angasi. This investigation further tested the hypothesis, developed previously for the alkaline-earth metals, that the biological half-life of a metal in soft tissue is related to its solubility when deposited in the extracellular granules of the bivalve. This hypothesis was tested for the above radionuclides (tracers of the stable metals) by a comparison of (a) a qualitative a priori prediction of their biological half-lives in bivalve tissue, based on critically evaluated log KS,, values for their respective hydrogen phosphate salts, and calibrated to previous experimentally determined rates of loss for 45Ca and 226Ra, with (b) their empirical biological half-lives that were investigated experimentally using the radionuclides 45Ca, 6oCo, 210Pb, 54Mn and `09Cd. The results of the experimental investigation showed that the mean values calculated for the biological half-lives of 4SCa and 6oCo in the tissue were 106 and 121 days, respectively, but there was no significant (P > 0.05) loss of 20Pb, 54Mn or `Cd from the soft tissue over 160 days, when bivalves were exposed to radionuclide-free water. A chemical model was developed from first principles that quantitatively explains the kinetic mechanisms that underlie the differential rates of loss of divalent metals from the extracellular granules of K angasi. The experimental results were consistent with the predictions of the model; however, some investigational limitations were evident, and these are discussed. The uptake of each radionuclide into the bivalve tissue tended to be linear, but the variation in tissue concentration.

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