Predicting the Risk from Cadmium Transfer to Crops from Soils Amended with Biosolids
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The National Biosolids Research Program (NBRP) has conducted field-based experiments throughout Australia over 4 years to determine the benefits and risks associated with biosolid applications onto agricultural land. The solubility and bioavailability of cadmium (Cd) in biosolids was assessed. Cadmium in biosolids was found to be quite soluble (equivalent to soluble Cd salts), but transfer to cereal grains was less than that indicated by solubility, due possibly to Zn or organic matter also added in the biosolids erducing Cd accumulation. Critical soil guideline values for Cd have been developed based on soil clay content and soil pH.
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A Field Investigation of Solubility and Food Chain Accummulation of Biosolid-Cadmium Across Diverse Soil TypesMcLaughlin, M.; Whatmuff, M.; Warne, M.; Heemsbergen, D.; Barry, G.; Bell, M.; Nash, D.; Pritchard, Deborah (2006)Cadmium is a potentially toxic metal that is an unwanted contaminant in urban wastewater biosolids, and has the potential to accumulate through the food chain. This study found that the accumulation of cadmium in wheat ...
Pritchard, Deborah Leeanne (2005)The annual production of biosolids in the Perth region during the period of this study was approximately 13,800 t dry solids (DS), being supplied by three major wastewater treatment plants. Of this, 70% was typically used ...
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