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Plant colonization of brownfield soil and post-washing sludge: effect of organic amendment and environmental conditions

  • P. Adamo
  • A. MingoEmail author
  • I. Coppola
  • R. Motti
  • A. Stinca
  • D. Agrelli
Original Paper

Abstract

This paper analyses the effects of substrate properties and environmental conditions on spontaneous vegetation of soil and sludges from a dismantled steel plant moderately polluted by heavy metals and polycyclic aromatic hydrocarbons. Plant colonization was monitored in the presence or absence of acidic peat for 5 years both inside the degraded brownfield site and after transferral into a nearby Oak Park environment. Overall, 57 plant species grew healthily on the substrates, with peat enhancing plant growth in the unfavourable brownfield site. Most of the species were found in the park (91 %), showing plant colonization was mainly affected by the immediate environment rather than by substrate properties. Restricted metal uptake and tissue accumulation by selected plants were measured, with only Daucus carota showing a higher ability to translocate metals to shoots (shoot/root metal concentration quotient >1 with peat). Phytostabilization with native plants represents an economically more realistic and cost-effective option than excavation, soil washing and sludge disposal, especially for vast industrial sites. Addition of organic matter and planting strategically selected vegetation islands could facilitate the spontaneous recovery of such highly degraded environments.

Keywords

Phytoremediation Heavy metals Polycyclic aromatic hydrocarbons Vascular flora Peat 

Notes

Acknowledgments

Thanks are due to the ILVA staff, for supplying the soil and sludge and for help given in setting up the experiment, and to head and technical personnel of the Royal Park of Portici, for hosting the experiment and for collaboration. This research was supported in part by the University of Napoli Federico II via a doctoral scholarship and the Italian Ministry of Universities and Scientific and Technological Research (PRIN project 2005075734-2005).

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Copyright information

© Islamic Azad University (IAU) 2014

Authors and Affiliations

  • P. Adamo
    • 1
  • A. Mingo
    • 1
    Email author
  • I. Coppola
    • 1
  • R. Motti
    • 1
  • A. Stinca
    • 1
  • D. Agrelli
    • 1
  1. 1.Dipartimento di AgrariaUniversità degli Studi di Napoli Federico IIPorticiItaly

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