A field investigation of solubility and food chain accumulation of biosolid-cadmium across diverse soil types

Mike J. McLaughlin, Mark Whatmuff, Michael Warne, Diane Heemsbergen, Glenn Barry, Mike Bell, David Nash, Deb Pritchard

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

One of the pathways for transfer of cadmium (Cd) through the food chain is addition of urban wastewater solids (biosolids) to soil, and many countries have restrictions on biosolid use to minimize crop Cd contamination. The basis of these restrictions often lies in laboratory or glasshouse experimentation of soil?plant transfer of Cd, but these studies are confounded by artefacts from growing crops in controlled laboratory conditions. This study examined soil to plant (wheat grain) transfer of Cd under a wide range of field environments under typical agronomic conditions, and compared the solubility and bioavailability of Cd in biosolids to soluble Cd salts. Solubility of biosolid Cd (measured by examining Cd partitioning between soil and soil solution) was found to be equal to or greater than that of soluble Cd salts, possibly due to competing ions added with the biosolids. Conversely, bioavailability of Cd to wheat and transfer to grain was less than that of soluble Cd salts, possibly due to addition of Zn with the biosolids, causing reduced plant uptake or grain loading, or due to complexation of soluble Cd2+ by dissolved organic matter.

Original languageEnglish
Pages (from-to)428-432
Number of pages5
JournalEnvironmental Chemistry
Volume3
Issue number6
DOIs
Publication statusPublished - 13 Dec 2006
Externally publishedYes

Keywords

  • Agricultural chemistry
  • Bioavailability
  • Contaminant uptake
  • Food quality
  • Soil chemistry

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Environmental Chemistry
  • Geochemistry and Petrology

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  • Cite this

    McLaughlin, M. J., Whatmuff, M., Warne, M., Heemsbergen, D., Barry, G., Bell, M., ... Pritchard, D. (2006). A field investigation of solubility and food chain accumulation of biosolid-cadmium across diverse soil types. Environmental Chemistry, 3(6), 428-432. https://doi.org/10.1071/EN06061