Screening for natural manganese scavengers: Divergent phytoremediation potentials of wetland plants

Autor(es)

Ferreira, Amanda Duim ; Queiroz, Hermano Melo ; Barcellos, Diego ; Otero, Xose L. ; Nobrega, Gabriel Nuto ; Bernardino, Angelo Fraga ; Ferreira, Tiago Osorio

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CLEANER PRODUCTION; v. 365, p. 11-pg., 2022-09-10.

Resumo

Manganese is a potentially toxic micronutrient with great ecological risk. In wetland soils, Mn bioavailability increases sharply with contamination hazards. Wetland plants may have different effects on Mn mobility and reactivity in soils, affecting their phytoremediation potential. This study evaluated the role of three naturally occurring wetland plants (i.e., Hibiscus tiliaceus, Eleocharis acutangula, and Typha domingensis) in Mn biogeochemistry and screened their potential for phytoremediation in an Mn-contaminated estuary (Doce River estuary; SE-Brazil). Shoots, roots, and soils (0-40 cm) of each plant species were sampled. Soil physicochemical parameters (i.e., pH, rhizospheric pH, and redox potentials) were measured, and Mn concentrations were determined in the plant tissues, root iron plaques, and soils. In addition, Mn geochemical fractionation was performed on the studied soils. Our results reveal that T. domingensis is highly efficient at Mn phytoremediation. T. domingensis showed unprecedented Mn shoot concentrations (6858 mg kg(-1)), translocation (TF; 99.5), and bioconcentration factors (BCF; 11.7). We revealed that rhizospheric acidification promoted by T. domingensis significantly altered the soil Mn geochemistry, favoring its acquisition from iron plaques and short-range-ordered Mn oxides. In contrast, despite the high Mn bioavailability, E. acutangula and H. tiliaceus showed Mn concentrations 13- and 10-fold lower than those recorded for T. domingensis. Naturally growing T. domingensis is able to phytoextract 147 tons of Mn (~19,000 m(2)), which represents a removal of 75.7 ton ha(-1). The Mn phytoextraction potential of T. domingensis should be assessed in association with different phytotechnologies and agronomic practices to maximize its phytoextraction efficiency. (AU)

• Processo FAPESP: 21/00221-3 - De drenos a emissores: vulnerabilidade de solos de mangue como sumidouros de carbono frente as mudanças climáticas globais
• Beneficiário: Hermano Melo Queiroz
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/04259-2 - Biogeoquímica de ferro e seu controle sobre a dinâmica de metais traço nos solos do estuário do Rio Doce após o "desastre de Mariana"
• Beneficiário: Hermano Melo Queiroz
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 19/19987-6 - Solos e plantas do estuário do Rio Doce e seu controle sobre a biogeoquímica de ferro e metais em resposta ao desastre de Mariana (MG)
• Beneficiário: Tiago Osório Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/08408-2 - Estudos comparativos de transformações minerais de nanopartículas de óxidos de ferro em solos e sedimentos afetados por rejeitos de mineração e seus impactos na mobilização e fixação de metais pesados em dois ambientes redox contrastantes
• Beneficiário: Tiago Osório Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/14800-5 - Plantas estuarinas e seu controle na biogeoquímica de metais em solos impactados pelo `desastre de Mariana´
• Beneficiário: Amanda Duim Ferreira
• Modalidade de apoio: Bolsas no Brasil - Doutorado