Co-culture of Salix viminalis and Trifolium repens for the phytostabilisation of Pb and As in mine tailings amended with hardwood biochar - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles Environmental Geochemistry and Health Year : 2022

Co-culture of Salix viminalis and Trifolium repens for the phytostabilisation of Pb and As in mine tailings amended with hardwood biochar

Abstract

Metal(loid) soil pollution causes environmental and health issues, and thus those sites need to be remediated. This can be done through phytostabilization, in combination with biochar amendment. The objectives were to investigate the potential of Salix viminalis L. associated with Trifolium repens L. for the phytostabilization of biochar-amended contaminated soils by assessing (1) the tolerance of both plants to metal(loid)s, through the biomass production, (2) the concentrations of metal(loid)s in plant parts and (3) the concentrations of metal(loid)s in soil pore water and percolation waters. Results showed that plant growth affected soil pore water Physico-chemical properties and metal(loid) mobility. When comparing the mono- and poly-cultures, although pH was higher with the polyculture than the monoculture, the decrease in Pb mobility did not differ. Moreover, the leachate analysis showed that As concentration in the soil particles leached from the soil was higher in the polyculture condition, while Pb concentration was the highest in the willow vegetated condition. Finally, willow dry weight was not affected by the presence of clover, while clover dry weight was lower when it was grown with willow. In conclusion, the results showed that the willow and clover polyculture was not better than the monoculture of these two species for the phytomanagement of a former mine site amended with biochar.
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Dates and versions

hal-03517854 , version 1 (08-01-2022)

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Romain Nandillon, Manhattan Lebrun, Florie Miard, Marie Gaillard, Stéphane Sabatier, et al.. Co-culture of Salix viminalis and Trifolium repens for the phytostabilisation of Pb and As in mine tailings amended with hardwood biochar. Environmental Geochemistry and Health, 2022, 44 (4), pp.1229-1244. ⟨10.1007/s10653-021-01153-0⟩. ⟨hal-03517854⟩
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