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The Cd mobility in incubated sewage sludge after ameliorative materials additions

Author

Listed:
  • A. Hanč

    (Czech University of Agriculture in Prague, Czech Republic)

  • P. Tlustoš

    (Czech University of Agriculture in Prague, Czech Republic)

  • J. Száková

    (Czech University of Agriculture in Prague, Czech Republic)

  • J. Balík

    (Czech University of Agriculture in Prague, Czech Republic)

Abstract

Cadmium mobility in sewage sludge amended by four types of ameliorative materials (lime, limestone, bentonite and zeolite) incubated under aerobic and anaerobic conditions for eight months was studied in the experiment. The most statistically significant decrease of available Cd extracted by 0.01 mol/l CaCl2 was recorded in sludge between second and fourth months of incubation. As most effective stabilizers were found limestone and bentonite added into the sludge incubated under aerobic and anaerobic conditions respectively. The presence of air reduced Cd mobility in individual sludges more than lack of air. Cadmium was separated by sequential extraction into five fractions as water soluble, exchangeable, bound with Fe and Mn oxides, organically bound, and residual fraction. Sequential analysis showed decrease of Cd in exchangeable and oxide fractions in sludge treated by lime and limestone at the end of aerobic incubation. Cadmium was found in water soluble and exchangeable fractions in small portion, even so its content in these fractions was higher than determined in slighter 0.01 mol/l CaCl2 solution.

Suggested Citation

  • A. Hanč & P. Tlustoš & J. Száková & J. Balík, 2006. "The Cd mobility in incubated sewage sludge after ameliorative materials additions," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 52(2), pages 64-71.
    • Handle: RePEc:caa:jnlpse:v:52:y:2006:i:2:id:3347-pse
    DOI: 10.17221/3347-PSE
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    References listed on IDEAS

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    1. M. Puschenreiter & O. Horak & W. Friesl & W. Hartl, 2005. "Low-cost agricultural measures to reduce heavy metal transfer into the food chain - a review," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 51(1), pages 1-11.
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    Cited by:

    1. A. Hanč & P. Tlustoš & J. Száková & J. Habart & K. Gondek, 2008. "Direct and subsequent effect of compost and poultry manure on the bioavailability of cadmium and copper and their uptake by oat biomass," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 54(7), pages 271-278.

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