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Phytoextraction of lead by Helianthus annuus: effect of mobilising agent application time

Author

Listed:
  • A.A. Safari Sinegani

    (Faculty of Agriculture, Bu-Ali Sina University, Hamadan, Iran)

  • F. Khalilikhah

    (Faculty of Agriculture, Bu-Ali Sina University, Hamadan, Iran)

Abstract

Pot experiments were conducted to determine the best time for application of (ethylenediaminetetraacetic acid) EDTA and sheep manure extract (SME) in phytoremediation of a contaminated soil by Helianthus annuus. The plant was grown in a mine calcareous soil treated with increasing concentrations of EDTA or SME in 30 and 10 days before sowing (T1 and T2) and 10 and 30 days after sowing (T3 and T4). The best time for EDTA application was T4. The EDTA application before seed germination significantly reduced sunflower seedling emergence and dry weight. Soil available Pb and lead concentrations in plant organs increased with EDTA concentration but the actual amount of phytoextracted Pb decreased at high EDTA concentrations significantly, due to severe growth depression. SME application after sowing can increase plant dry weight and Pb concentration in the soil solution, enhancing the accumulated metal concentrations in shoots and roots. However the results showed that the most efficient treatments for Pb phytoextraction by sunflower are applications of 0.5 and 2 g EDTA/kg soil at T3 and T4, respectively.

Suggested Citation

  • A.A. Safari Sinegani & F. Khalilikhah, 2008. "Phytoextraction of lead by Helianthus annuus: effect of mobilising agent application time," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 54(10), pages 434-440.
    • Handle: RePEc:caa:jnlpse:v:54:y:2008:i:10:id:400-pse
    DOI: 10.17221/400-PSE
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    Cited by:

    1. G. Mühlbachová, 2009. "Microbial biomass dynamics after addition of EDTA into heavy metal contaminated soils," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 55(12), pages 544-550.

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