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<p>Mercury (Hg) is a metal that is harmful to biodiversity and human health. The aim of the study was to prospect pioneer plants for use in soil Hg remediation. The samples occurred in forty points distributed in the urban perimeter in residential areas. The sixteen species with the highest occurrence in the sampling sites evaluated regarding the concentration of Hg in the roots and aerial parts of the plants, in addition to the analysis of the associated soil. From the chemical analysis, the translocation factors (TF), bioconcentration (BCF) and bioaccumulation (BAF) calculated, used to evaluate the ability of Hg accumulation in plant tissues. The Hg detected in all samples evaluated. For the soil, the Hg concentrations at the sampling points did not differ and were above the Quality Reference Value (QRV) set up by the national legislation. For plants, the results showed seven species in which at least one of the evaluated factors presented a higher value than one, showing that they could transport and accumulate Hg in their tissues, a fundamental characteristic for use in phytoremediation. Future perspectives include laboratory studies evaluating these species on the aspects of phytotoxicity and accumulation in higher concentrations of Hg in the substrate. The study showed, in a simple and safe way, seven pioneer species with potential for application in soil phytoremediation in areas affected by Hg and that can contribute to the bioindication and maintenance of the quality of the environment.</p>

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Characterizing pioneer plants for phytoremediation of mercury-contaminated urban soils

  • 期刊论文

  • 发表日期：

    2025年1月6日

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  • C. dos Santos Soares,
  • V. J. Santos Lopes,
  • F. de Freitas,
  • M. O. Córdova,
  • L. Cavalheiro,
  • L. D. Battirola,
  • R. L. T. de Andrade

摘要

Mercury (Hg) is a metal that is harmful to biodiversity and human health. The aim of the study was to prospect pioneer plants for use in soil Hg remediation. The samples occurred in forty points distributed in the urban perimeter in residential areas. The sixteen species with the highest occurrence in the sampling sites evaluated regarding the concentration of Hg in the roots and aerial parts of the plants, in addition to the analysis of the associated soil. From the chemical analysis, the translocation factors (TF), bioconcentration (BCF) and bioaccumulation (BAF) calculated, used to evaluate the ability of Hg accumulation in plant tissues. The Hg detected in all samples evaluated. For the soil, the Hg concentrations at the sampling points did not differ and were above the Quality Reference Value (QRV) set up by the national legislation. For plants, the results showed seven species in which at least one of the evaluated factors presented a higher value than one, showing that they could transport and accumulate Hg in their tissues, a fundamental characteristic for use in phytoremediation. Future perspectives include laboratory studies evaluating these species on the aspects of phytotoxicity and accumulation in higher concentrations of Hg in the substrate. The study showed, in a simple and safe way, seven pioneer species with potential for application in soil phytoremediation in areas affected by Hg and that can contribute to the bioindication and maintenance of the quality of the environment.