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Heavy Metals in Mine-Tailing Soil Mixtures Cultivated with Ricinus communis L.

Elizabeth González-Terreros,V. Ruíz-Valdiviezo,Alejandro Galván-Velázquez,M. O. Franco-Hernández,M. Luna-Guido,L. Dendooven

Published 2018 in Polish Journal of Environmental Studies

ABSTRACT

Ricinus communis L. was found to vegetate mine tailings with high concentrations of Al (4,456 mg kg-1), As (3,473 mg kg-1), Cd (120 mg kg-1), Cr (14 mg kg-1), Cu (1,147 mg kg-1), and Pb (910 mg kg-1). We investigated how this plant responded to increased heavy metal concentrations by mixing mine tailing at 0%, 50%, 70%, and 100% with soil at 100%, 50%, 30%, and 0%, while metal concentrations in the rhizosphere, roots, and aboveground parts of R. communis were monitored. Ricinus communis shoots were 19% smaller and roots 8% in soil mixed with an equal amount of mine tailings compared to plants cultivated in soil and 33% and 54%, respectively, when cultivated in mine tailings. The ratio of As, Cd, Cu, and Pb in the aboveground plant parts to the concentration in soil remained <0.12, while that of the roots <0.25. The As concentration was 35% lower in the bulk soil than in the rhizosphere. We found that R. communis growth was inhibited strongly when cultivated in mine tailings, but less so when mixed with soil, and metals did not accumulate in the roots and aboveground plant parts. These characteristics make R. communis ideal to vegetate metal-contaminated soil, thereby reducing the environmental hazards of mine tailings.

PUBLICATION RECORD

  • Publication year

    2018

  • Venue

    Polish Journal of Environmental Studies

  • Publication date

    2018-05-30

  • Fields of study

    Environmental Science

  • Identifiers
    DOI 10.15244/PJOES/78923
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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