Summary
0.1 M NaNO3 is used to assess bioavailability of metals in different polluted soils. Promising results are obtained for cadmium, zinc and copper whereas more research is still needed for nickel, to find out why the plant response is not so well correlated to soluble soil concentrations as in the case of the other three metals. The German colleagues prefer CaCl2 because this solvent extracts 2 to k times more of the metals than NaNO3.
It is further shown that the NaNO3 extraction method is also suited to characterize critical metal levels in soils which were “naturally” contaminated by different pollution sources. The consequences of the findings for the soil protection against pollution in the Swiss legislation are emphasized.
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References
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© 1986 ECSC, EEC, EAEC, Brussels and Luxembourg
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Häni, H., Gupta, S. (1986). Chemical Methods for the Biological Characterization of Metal in Sludge and Soil. In: L’Hermite, P. (eds) Processing and Use of Organic Sludge and Liquid Agricultural Wastes. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4756-6_9
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DOI: https://doi.org/10.1007/978-94-009-4756-6_9
Publisher Name: Springer, Dordrecht
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