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Bioavailability of zinc and copper in biosolids compared to their soluble salts.

Heemsbergen, D.A. and McLaughlin, M.J. and Whatmuff, M. and Warne, M.S.J. and Broos, K. and Bell, M.J. and Nash, D. and Barry, G. and Prtichard, D. and Penney, N. (2010) Bioavailability of zinc and copper in biosolids compared to their soluble salts. Environmental Pollution, 158 (5). pp. 1907-1915.

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Article Link(s): http://dx.doi.org/10.1016/j.envpol.2009.10.037

Publisher URL: http://www.elsevier.com

Abstract

For essential elements, such as copper (Cu) and zinc (Zn), the bioavailability in biosolids is important from a nutrient release and a potential contamination perspective. Most ecotoxicity studies are done using metal salts and it has been argued that the bioavailability of metals in biosolids can be different to that of metal salts. We compared the bioavailability of Cu and Zn in biosolids with those of metal salts in the same soils using twelve Australian field trials. Three different measures of bioavailability were assessed: soil solution extraction, CaCl2 extractable fractions and plant uptake. The results showed that bioavailability for Zn was similar in biosolid and salt treatments. For Cu, the results were inconclusive due to strong Cu homeostasis in plants and dissolved organic matter interference in extractable measures. We therefore recommend using isotope dilution methods to assess differences in Cu availability between biosolid and salt treatments.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science, QPIF
Business groups:Agri-Science, Crop and Food Science
Additional Information:© Crown Copyright. © Elsevier B.V
Keywords:Biosolids; bioavailability; metals; copper; zinc; soil quality; soil sampling; plant sampling; soil microbial processes; sewage-sludge; heavy-metals; contaminated soils; Australian soils; inorganic salts; cadmium; toxicity.
Subjects:Agriculture > Agriculture (General) > Soils. Soil science > Soil chemistry
Science > Statistics > Statistical data analysis
Deposited On:23 Jun 2010 04:55
Last Modified:07 Jun 2015 15:09

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