Abstract
Analysis of spatial distribution of sewage-sludge born cadmium on the experimental plot revealed positive correlation of total cadmium and organic matter. Soil pH fluctuated randomly on the field. ‘Bioavailable’ concentrations, as determined by NH4-acetate extraction, were closely correlated to the total cadmium levels, and only negligible effects of pH and/or organic matter fluctuations were recorded. Desorption model using modified Freundlich isotherm was applied to predict risks of cadmium solubilization at different conditions. Simulations revealed that the organic matter content within the ranges found at the experimental field cannot support a proper immobilization of cadmium at pH-range observed at the field. The phenomenon was explained by ineffective care for the soil in the past.
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Tichý, R., Nýdl, V., Kužel, S. et al. Increased cadmium availability to crops on a sewage-sludge amended soil. Water Air Soil Pollut 94, 361–372 (1997). https://doi.org/10.1007/BF02406068
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DOI: https://doi.org/10.1007/BF02406068