Organic amendments for improving biomass production and metal yield of Ni-hyperaccumulating plants

The Science of the Total Environment
V Álvarez-LópezP S Kidd

Abstract

Ni phytomining is a promising technology for Ni recovery from low-grade ores such as ultramafic soils. Metal-hyperaccumulators are good candidates for phytomining due to their extraordinary capacity for Ni accumulation. However, many of these plants produce a low biomass, which makes the use of agronomic techniques for improving their growth necessary. In this study, the Ni hyperaccumulators Alyssum serpyllifolium ssp. lusitanicum, A. serpyllifolium ssp. malacitanum, Alyssum bertolonii and Noccaea goesingense were evaluated for their Ni phytoextraction efficiency from a Ni-rich serpentine soil. Effects of soil inorganic fertilisation (100:100:125kgNPKha(-1)) and soil organic amendment addition (2.5, 5 or 10% compost) on plant growth and Ni accumulation were determined. All soil treatments greatly improved plant growth, but the highest biomass production was generally found after addition of 2.5 or 5% compost (w/w). The most pronounced beneficial effects were observed for N. goesingense. Total Ni phytoextracted from soils was significantly improved using both soil treatments (inorganic and organic), despite the decrease observed in soil Ni availability and shoot Ni concentrations in compost-amended soils. The most promising resu...Continue Reading

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Citations

Oct 12, 2016·The Science of the Total Environment·Theresa RosenkranzMarkus Puschenreiter
Jan 26, 2017·Environmental Science and Pollution Research International·Álvarez-López VanessaKidd Petra Susan
May 4, 2018·International Journal of Phytoremediation·Zahra GhasemiPetra S Kidd
Aug 27, 2017·Environmental Science and Pollution Research International·Mohan LiuYan Xiao
Sep 26, 2020·International Journal of Phytoremediation·Christina HipfingerMarkus Puschenreiter
Mar 8, 2020·International Journal of Environmental Research and Public Health·Mo-Ming LanYe-Tao Tang
Oct 14, 2020·International Journal of Phytoremediation·Mohan LiuYan Xiao
Feb 16, 2021·International Journal of Phytoremediation·Dulce Montserrat Navarrete GutiérrezGuillaume Echevarria
Jun 1, 2021·The Science of the Total Environment·Paula MadejónTeodoro Marañón

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