Radiotracer analysis of cadmium speciation in soil solutions using electrophoresis, dialysis, centrifugation, and ultrafiltration View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-12

AUTHORS

Petr Beneš, JiŘí Mizera

ABSTRACT

Speciation of carrier-free109Cd, added in cationic form to prefiltered extracts obtained by leaching forest soil samples with distilled water, was analyzed using electrophoresis, dialysis, centrifugation, and ultrafiltration. Rapid establishment of isotopic equilibrium between the added109Cd and stable cadmium present in the extracts was observed. All the data obtained indicated that109Cd and also stable cadmium were present in the analyzed extracts in the form of neutral or negatively charged organic complexes or small colloids. The results of electrophoresis enabled the characterization, at least semiquantitative, of the abundance and electrophoretic mobility of the forms present. The incomplete dialysis of109Cd from the soil extracts through cellophane membrane against water proved the presence of organic associates with molecular weights higher than 104. Dialysis against the same, but unlabeled extract was always complete, indicating the reversible (labile) nature of the organic forms of cadmium. Assessment of the stability constants of the organic forms using a simple discrete two-site model suggested that humate and/or fulvate complexes of cadmium were formed. More... »

PAGES

91-101

References to SciGraph publications

  • 1979-03. Radiotracer analysis of the physico-chemical state of trace elements in aqueous solutions in JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
  • Identifiers

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    http://scigraph.springernature.com/pub.10.1007/bf02784195

    DOI

    http://dx.doi.org/10.1007/bf02784195

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1010875418

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/10676483


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