Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potential

Panicum virgatum and Pennisetum alopecuroides, two non-food bioenergy crops, were evaluated for their capacity to phyto-manage trace metals (Pb, Zn, Ni, Fe, Mn, Co, Cr, and Cu) from municipal solid waste digestate after its application to a marginal soil. For that, 90-day vertical soil column mesoco...

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Main Authors: Neus Bonet-Garcia, Veronica Baldasso, Valentin Robin, Carlos R. Gomes, Gilles Guibaud, Maria João Alves, Ricardo Castro, Ana Paula Mucha, C. Marisa R. Almeida
Format: Article
Language:English
Published: Frontiers Media S.A. 2023-11-01
Series:Frontiers in Environmental Science
Subjects:
Online Access:https://www.frontiersin.org/articles/10.3389/fenvs.2023.1267463/full
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author Neus Bonet-Garcia
Neus Bonet-Garcia
Veronica Baldasso
Veronica Baldasso
Valentin Robin
Carlos R. Gomes
Carlos R. Gomes
Gilles Guibaud
Maria João Alves
Ricardo Castro
Ana Paula Mucha
Ana Paula Mucha
C. Marisa R. Almeida
C. Marisa R. Almeida
author_facet Neus Bonet-Garcia
Neus Bonet-Garcia
Veronica Baldasso
Veronica Baldasso
Valentin Robin
Carlos R. Gomes
Carlos R. Gomes
Gilles Guibaud
Maria João Alves
Ricardo Castro
Ana Paula Mucha
Ana Paula Mucha
C. Marisa R. Almeida
C. Marisa R. Almeida
author_sort Neus Bonet-Garcia
collection DOAJ
description Panicum virgatum and Pennisetum alopecuroides, two non-food bioenergy crops, were evaluated for their capacity to phyto-manage trace metals (Pb, Zn, Ni, Fe, Mn, Co, Cr, and Cu) from municipal solid waste digestate after its application to a marginal soil. For that, 90-day vertical soil column mesocosm (columns with 0.6 × 0.2 m) experiments were carried out to assess 1) the impact of digestate application on the health of marginal soil, 2) plant effect on digestate-borne trace metals’ mobility along the soil profile (measuring total metal levels and fractionation in different soil layers by atomic absorption spectroscopy, and 3) plant growth performance and trace metal (Pb, Zn, and Cu) uptake capacity. The results showed that trace metals were mostly confined in the 0–0.2 m soil horizon over the course of the experimental period, migrating from the digestate-amended soil layer (0–0.1 m) to the layer underneath (0.1–0.2 m) within the first 21 days and remaining stable afterward. No evidence of the trace metals’ mobility to deeper soil layers was detected. Migration of trace metals was reduced in the presence of P. virgatum and P. alopecuroides, suggesting a phytoremediation (phytostabilization) effect. For both plant species, no trace metal accumulation in the roots was observed (bioconcentration factor <1), although both plants showed a potential for Zn translocation for aboveground tissues (translocation factor >1). The growth of both plants was positively affected by municipal solid waste digestate application, which also improved soil quality (increased concentration of total organic carbon and available phosphorus, as well as cation exchange capacity and water holding capacity).
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spelling doaj.art-75bf6325c4224f6daf5d9fd098e51b342023-11-09T15:53:43ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2023-11-011110.3389/fenvs.2023.12674631267463Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potentialNeus Bonet-Garcia0Neus Bonet-Garcia1Veronica Baldasso2Veronica Baldasso3Valentin Robin4Carlos R. Gomes5Carlos R. Gomes6Gilles Guibaud7Maria João Alves8Ricardo Castro9Ana Paula Mucha10Ana Paula Mucha11C. Marisa R. Almeida12C. Marisa R. Almeida13Chemistry and Biochemistry Department, Faculty of Sciences, University of Porto, Porto, PortugalCIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Matosinhos, PortugalChemistry and Biochemistry Department, Faculty of Sciences, University of Porto, Porto, PortugalCIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Matosinhos, PortugalE2Lim, Université de Limoges, Limoges, FranceChemistry and Biochemistry Department, Faculty of Sciences, University of Porto, Porto, PortugalCIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Matosinhos, PortugalE2Lim, Université de Limoges, Limoges, FranceTratoLixo—Tratamento de Resíduos Sólidos, E.I.M., S.A., São Domingos de Rana, PortugalTratoLixo—Tratamento de Resíduos Sólidos, E.I.M., S.A., São Domingos de Rana, PortugalCIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Matosinhos, PortugalBiology Department, Faculty of Sciences, University of Porto, Porto, PortugalChemistry and Biochemistry Department, Faculty of Sciences, University of Porto, Porto, PortugalCIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Matosinhos, PortugalPanicum virgatum and Pennisetum alopecuroides, two non-food bioenergy crops, were evaluated for their capacity to phyto-manage trace metals (Pb, Zn, Ni, Fe, Mn, Co, Cr, and Cu) from municipal solid waste digestate after its application to a marginal soil. For that, 90-day vertical soil column mesocosm (columns with 0.6 × 0.2 m) experiments were carried out to assess 1) the impact of digestate application on the health of marginal soil, 2) plant effect on digestate-borne trace metals’ mobility along the soil profile (measuring total metal levels and fractionation in different soil layers by atomic absorption spectroscopy, and 3) plant growth performance and trace metal (Pb, Zn, and Cu) uptake capacity. The results showed that trace metals were mostly confined in the 0–0.2 m soil horizon over the course of the experimental period, migrating from the digestate-amended soil layer (0–0.1 m) to the layer underneath (0.1–0.2 m) within the first 21 days and remaining stable afterward. No evidence of the trace metals’ mobility to deeper soil layers was detected. Migration of trace metals was reduced in the presence of P. virgatum and P. alopecuroides, suggesting a phytoremediation (phytostabilization) effect. For both plant species, no trace metal accumulation in the roots was observed (bioconcentration factor <1), although both plants showed a potential for Zn translocation for aboveground tissues (translocation factor >1). The growth of both plants was positively affected by municipal solid waste digestate application, which also improved soil quality (increased concentration of total organic carbon and available phosphorus, as well as cation exchange capacity and water holding capacity).https://www.frontiersin.org/articles/10.3389/fenvs.2023.1267463/fullanaerobic digestatetrace metalsphytoremediationbioenergy crop plantssoil reclamation
spellingShingle Neus Bonet-Garcia
Neus Bonet-Garcia
Veronica Baldasso
Veronica Baldasso
Valentin Robin
Carlos R. Gomes
Carlos R. Gomes
Gilles Guibaud
Maria João Alves
Ricardo Castro
Ana Paula Mucha
Ana Paula Mucha
C. Marisa R. Almeida
C. Marisa R. Almeida
Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potential
Frontiers in Environmental Science
anaerobic digestate
trace metals
phytoremediation
bioenergy crop plants
soil reclamation
title Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potential
title_full Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potential
title_fullStr Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potential
title_full_unstemmed Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potential
title_short Metal mobility in an anaerobic-digestate-amended soil: the role of two bioenergy crop plants and their metal phytoremediation potential
title_sort metal mobility in an anaerobic digestate amended soil the role of two bioenergy crop plants and their metal phytoremediation potential
topic anaerobic digestate
trace metals
phytoremediation
bioenergy crop plants
soil reclamation
url https://www.frontiersin.org/articles/10.3389/fenvs.2023.1267463/full
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