Cadmium bioaccumulation assays. Their relationship to various ionic equilibria in Lake Superior water.

Poldoski, J.E.

doi:10.1021/es60166a017

Cited by 37 publications

(31 citation statements)

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“…The effect of DOC on trace metal bbiavailability is due to the cheldion or complexation of trace metal ions, largely onto hnrmic and fnrlvic acids (Neubecker and Allen 1983). Eaboratory studies (Poldoski 1979 chelators, may increase or decrease the bioavailability or toxicity of Cd to invertebrates. The net effect of high DOC concentrations in central Ontario lakes is to decrease the availability of Cd to H .…”

Section: Methodsmentioning

confidence: 99%

Multivariate Analysis of Correlations Between Environmental Parameters and Cadmium Concentrations in Hyalella azteca (Crustacea: Amphipoda) from Central Ontario Lakes

Stephenson¹,

Mackie²

1988

Can. J. Fish. Aquat. Sci.

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1988. Multivariate analysis of correlations between environmental parameters and cadmium concentrations in Hyalella azteca (Crustacea: Amphipda) from central Ontario Bakes. Can. j. Fish. Aquat. Sci. 45: 1705-1 75 0.Cadmium concentrations in Hyalelda azteca collected from 69 central Ontario Bakes ranged from 8.1 3 to 56.6 kg/$ dry mass. Principal components analysis followed by multiple linear regression found three principal components, interpreted as water hardness, total cadmium, and dissolved organic carbon concentrations, to be significantly (p =S 0.002) correlated with cadmium concentrations in H. azteca. Cadmium concentrations in H.azteca were independent of cadmium concentrations in littoral sediments. It is suggested that cadmium ions compete with calcium ions for uptake sites on the gill surfaces of H. azteca. High concentrations of dissolved organic carbon may complex free cadmium ions and reduce their concentration in solution, leading to lower cadmium concentrations in H. azteca.Les teneldrs en cadmium chez des specimens d'Hyalella azteca prelev6s dans 69 Bacs du centre de ItOntario 6taient comprises entre 0,13 et 56,6 de masse sGche. L'analyse des cornposantes principales suivie d'une regression lineaire multiple a permis de dkceler une correlation significative (p 0,002) entre trois grandes composantes (durete de I'eau, cadmium total et concentration en carbone organique dissous) et les teneurs en cadmium relevees chez H. azteca. Les teneurs en cadmium chez H. azteca 6taient independantes de la teneur en cadmium des sgdiments Iittoraux. Ces donnees semblent indiquer que les ions cadmium rivalisent avec les ions calcium pour les sites de fixation la surface des branchies chez H. azteca. Des teneurs elevees en carbone organique dissous peuvent former des complexes avec des ions cadmium libres et r a u i r e Jeur concentration dans la solution, ce qui entraine des tenem en cadmium plus faibles chez 68. azteca.

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Section: Methodsmentioning

confidence: 99%

Multivariate Analysis of Correlations Between Environmental Parameters and Cadmium Concentrations in Hyalella azteca (Crustacea: Amphipoda) from Central Ontario Lakes

Stephenson¹,

Mackie²

1988

Can. J. Fish. Aquat. Sci.

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“…Ligand-metal complexes of these types are potentially able to cross cell membranes, leading to an increase in toxicity above that expected on the basis of the free-ion concentration (Poldoski, 1979;Block and Pärt, 1986;Guy and Kean, 1980;Pärt and Wikmark, 1984;Daly et al, 1990;Errécalde et al, 1998;Errécalde and Campbell, 2000).…”

Section: Design Of the Assay Conditionsmentioning

confidence: 99%

Coupling the use of computer chemical speciation models and culture techniques in laboratory investigations of trace metal toxicity

Twiss

Errécalde²,

Fortin

et al. 2001

Chemical Speciation & Bioavailability

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Chemical Speciation and Bioavailability (2001), 13(1) ABSTRACTThe bioavailability and toxicity of a dissolved metal are closely linked to the metal's chemical speciation in solution. A variety of inorganic and organic ligands are often used in laboratory toxicity tests to control the concentration of labile trace metal in solution. Computerised chemical speciation models based on thermodynamic principles can be used to estimate metal speciation under such experimental conditions. However, these models are sensitive to the quality of their thermodynamic databases. Detailed protocols for the incorporation of reliable equilibrium formation constants into widely available computer chemical speciation programs (e.g., MINEQL+ and MINTEQ) are provided. The examples demonstrate both the benefits and the potential pitfalls involved in the use of chemical speciation models. The application of chemical speciation modelling to metal toxicity studies is discussed and guidelines are proposed for its proper use. Both defined media and chemical speciation programs have co-existed for two decades but the combined use of these techniques has been reserved for those possessing in-depth knowledge of both chemistry and biology. The techniques presented should enable an investigator with basic biological, chemical and computing skills to design an aqueous medium and incorporate correct thermodynamic constants into a computer chemical speciation program, starting from a standardised database, thereby providing a sound framework for critically assessing the biological response of a particular test organism to a given metal.

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“…Dissolved ionic Cd, largely in the form of the chloride (CdCI2), was the compound used for aqueous exposure in the majority of the studies reviewed herein as well as in studies using Cd-contaminated artificial diets. There is evidence that Cd bioaccumulation depends upon the concentration"of free Cd ion, particularly the 2+ species, in solution (Poldoski 1979). Dissolved Cd is not always in a bioavailable form.…”

Section: B) Effects Of CD Speciation On Accumulation Retention and mentioning

confidence: 99%

Cadmium in aquatic food webs

Kay

1985

Residue Reviews

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Cadmium bioaccumulation assays. Their relationship to various ionic equilibria in Lake Superior water.

Cited by 37 publications

References 0 publications

Multivariate Analysis of Correlations Between Environmental Parameters and Cadmium Concentrations in Hyalella azteca (Crustacea: Amphipoda) from Central Ontario Lakes

Multivariate Analysis of Correlations Between Environmental Parameters and Cadmium Concentrations in Hyalella azteca (Crustacea: Amphipoda) from Central Ontario Lakes

Coupling the use of computer chemical speciation models and culture techniques in laboratory investigations of trace metal toxicity

Cadmium in aquatic food webs

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