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Fitoextração de níquel por uma população nativa de Alyssum serpyllifolium subsp. lusitanicum em solos ultramáficos (Portugal): perspetivas para fitomineração
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Advisor(s)
Abstract(s)
RESUMO: Este estudo teve os seguintes objetivos: (1) investigar a relação
entre as concentrações de níquel (Ni) nos solos e na planta Alyssum
serpyllifolium ssp. lusitanicum em regiões ultramáficas de Portugal; (2)
avaliar o potencial da espécie como bio-minério, para fitomineração de Ni.
Esta espécie é endémica dos solos serpentiníticos dos maciços de Bragança
e Morais, sendo hiperacumuladora de Ni. Em condições de campo, os
resultados mostram que, considerando as partes aéreas da planta, a biomassa
varia entre 4,08 e 9,37 t ha–1, contendo entre 0,25% e 1,23% de Ni, permitindo
uma extração entre 12,2 e 98,1 kg de Ni por hectare por cultura. A quantidade
de Ni extraído pela planta é semelhante em ambas as regiões ultramáficas,
correspondendo ao valor médio de 580 USD por hectare (preços de janeiro
2018). Os resultados indicam que alguns terrenos destas áreas ultramáficas
são potenciais produtores de Ni a partir desta espécie endémica.
ABSTRACT: The present study had the following objectives: (1) to investigate the relationship between nickel (Ni) concentration in the soil and the concentration in the plant (Alyssum serpyllifolium ssp. lusitanicum) in ultra mafic areas of Portugal; and (2) to assess the potential of this species for Ni phytomining as bio-ore. This species is endemic to serpentine soils of the Bragança and Morais massifs and is a Ni hyperaccumulator that can accumulate more than 12000 mg kg–1 (dry weight). Under natural condi tions, the results show that considering only the aerial parts of the plant, the biomass varies between 4.08-9.37 t ha–1, containing a range of 0.25-1.23% Ni, allowing a withdrawal of between 12.2-98.1 kg Ni ha–1 per crop under natural conditions. The amount of Ni extracted by the plant is similar in both ultramafic areas, having a mean value of approximately $US 580 per ha considering the January 2018 Ni prices. The results of this study indicate that some of the land in these ultramafic areas are potential producers of Ni from this endemic species.
ABSTRACT: The present study had the following objectives: (1) to investigate the relationship between nickel (Ni) concentration in the soil and the concentration in the plant (Alyssum serpyllifolium ssp. lusitanicum) in ultra mafic areas of Portugal; and (2) to assess the potential of this species for Ni phytomining as bio-ore. This species is endemic to serpentine soils of the Bragança and Morais massifs and is a Ni hyperaccumulator that can accumulate more than 12000 mg kg–1 (dry weight). Under natural condi tions, the results show that considering only the aerial parts of the plant, the biomass varies between 4.08-9.37 t ha–1, containing a range of 0.25-1.23% Ni, allowing a withdrawal of between 12.2-98.1 kg Ni ha–1 per crop under natural conditions. The amount of Ni extracted by the plant is similar in both ultramafic areas, having a mean value of approximately $US 580 per ha considering the January 2018 Ni prices. The results of this study indicate that some of the land in these ultramafic areas are potential producers of Ni from this endemic species.
Description
Keywords
Agromineração Bio-minério Fitotecnologia Flora serpentinítica Hiperacumulação Agromining Bio-ore Hyperaccumulation Phytotechnology Serpentine flora
Citation
Favas et al. 2020, ‘Fitoextração de níquel por uma população nativa de Alyssum serpyllifolium subsp. lusitanicum em solos ultramáficos (Portugal): perspetivas para fitomineração´, Comunicações Geológicas, vol. 107, nº 1 (especial), pp. 115-117.
Publisher
LNEG - Laboratório Nacional de Energia e Geologia