Weathering and vegetation controls on nickel isotope fractionation in surface ultramafic environments (Albania)

Estrade, Nicolas; Cloquet, Christophe; Echevarria, Guillaume; Sterckeman, Thibault; Deng, Tenghaobo; Tang, Yetao; Morel, Jean-Louis

doi:10.1016/j.epsl.2015.04.018

Cited by 79 publications

(88 citation statements)

References 46 publications

(87 reference statements)

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“…Authors suggested that secondary minerals (clay minerals and Fe-oxides) were responsible for the depletion in heavier isotopes. Fractionation of Ni in soils containing Fe-oxides as a main secondary mineral was higher (Δ 60 Ni soil-rock was -0.60 ‰) than in soils containing smectite as a main secondary mineral (Δ 60 Ni soil-rock was -0.20 ‰; Estrade et al 2015). This was supported by isotope analysis of both exchangeable and phytoavailable pools that show heavier Ni signature than the solid.…”

supporting

confidence: 64%

“…Soils derived from ultramafic rocks are depleted in heavier Ni isotopes compared to the parent rock (Δ 60 Ni soil-rock was -0.47 ‰ in Ratié et al 2015 and Δ 60 Ni soil-rock was up to -0.63 ‰ in Estrade et al 2015). Authors suggested that secondary minerals (clay minerals and Fe-oxides) were responsible for the depletion in heavier isotopes.…”

mentioning

confidence: 99%

“…Indonesia, Van der Ent et al 2013b). Very recently, several studies dealing with Ni isotopes composition of ultramafic rocks, soils derived from them and plants have been published (Ratié et al 2015;Estrade et al 2015;Ratié et al 2016). The range of δ…”

Section: Introductionmentioning

confidence: 99%

“…Ni in ultramafic soils in Brazil (Barro Alto and Niquelândia) is from -0.30 to 0.11 ‰ and in Albania (Qaftë Shtamë, Gjegjan, Prrenjas, Pojskë) from -0.33 to 0.38 ‰ (Estrade et al 2015;Ratié et al 2016). Soils derived from ultramafic rocks are depleted in heavier Ni isotopes compared to the parent rock (Δ 60 Ni soil-rock was -0.47 ‰ in Ratié et al 2015 and Δ 60 Ni soil-rock was up to -0.63 ‰ in Estrade et al 2015).…”

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confidence: 99%

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Rock-type control of Ni, Cr, and Co phytoavailability in ultramafic soils

et al. 2017

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Background and aims Ultramafic soils constitute an extreme environment for plants because of specific physico-chemical properties and the presence of Ni, Cr, and Co. We hypothesized that type of ultramafic parent rock depending on their origin affects the composition of soils and plants. Therefore, phytoavailability of metals would be higher in soil derived from serpentinized peridotite compared to serpentinite because of differences in susceptibility of minerals to weathering. Results Based on DTPA-CaCl 2 extractions, we noted that soil derived from the serpentinized peridotite is characterized by a higher phytoavailability of Ni compared to soil derived from the serpentinite. On the contrary, plant species growing on soil derived from the serpentinite contain higher concentrations of metals. Conclusions Our study suggests that the metal uptake by plants is controlled by the mineral composition of parent rocks, which results from both their original magmatic composition and later metamorphic processes. Chemical extractions show that the phytoavailability of Ni and Co is higher in soil derived from the serpentinized peridotite than the serpentinite. Surprisingly, plants growing on the soil derived from the serpentinite contain higher levels of metals compared to these from the serpentinized peridotite derived soil. This contrasting behavior is due to higher abundances of Ca and Mg, not only Ni and Co, in soil derived from the serpentinized peridotite as compared to those in the soil derived from the serpentinite. Calcium and Mg are favored by plants and preferably fill the available sites, resulting in low Ni and Co intake despite their higher abundances.

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supporting

confidence: 64%

mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Rock-type control of Ni, Cr, and Co phytoavailability in ultramafic soils

et al. 2017

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“…The soil pH can range from neutral to alkaline with a pH ranging from 6-8 in Mediterranean climates and in young soils (Cambisols) (Massoura et al 2006), whereas in tropical regions with intensive leaching, the soil pH may be acidic (pH 5.5) on Ferralsols ('laterites') (van der Ent et al 2013b). Total Ni concentrations in ultramafic surface soils typically range from 0.1 to 0.3 % but is often strongly enriched in the underlying saprolite (0.8-1.5 %), especially under intense leaching under tropical conditions (Estrade et al 2015;Golightly 1979;Proctor and Nagy 1992;Quantin et al 2002). Ultramafic soils that have total Ni concentrations greater than 0.1 % with high phytoavailable Ni pools are potentially suitable for Ni phytomining (van der Ent et al 2015b).…”

Section: Soil Ni Availability For 'Metal Crops'mentioning

confidence: 99%

Current status and challenges in developing nickel phytomining: an agronomic perspective

et al. 2016

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Background Nickel (Ni) phytomining operations cultivate hyperaccumulator plants ('metal crops') on Ni-rich (ultramafic) soils, followed by harvesting and incineration of the biomass to produce a high-grade 'bio-ore' from which Ni metal or pure Ni salts are recovered. Scope This review examines the current status, progress and challenges in the development of Ni phytomining agronomy since the first field trial over two decades ago. To date, the agronomy of less than 10 species has been tested, while most research focussed on Alyssum murale and A. corsicum. Nickel phytomining trials have so far been undertaken in Albania, Canada, France, Italy, New Zealand, Spain and USA using ultramafic or Ni-contaminated soils with 0.05-1 % total Ni. Conclusions N, P and K fertilisation significantly increases the biomass of Ni hyperaccumulator plants, and causes negligible dilution in shoot Ni concentration. Organic matter additions have pronounced positive effects on the biomass of Ni hyperaccumulator plants, but may reduce shoot Ni concentration. Soil pH adjustments, S additions, N fertilisation, and bacterial inoculation generally increase Ni phytoavailability, and consequently, Ni yield in 'metal crops'. Calcium soil amendments are necessary because substantial amounts of Ca are removed through the harvesting of 'bio-ore'. Organic amendments generally improve the physical properties of ultramafic soil, and soil moisture has a pronounced positive effect on Ni yield. Repeated 'metal crop' harvesting depletes soil phytoavailable Ni, but also promotes transfer of non-labile soil Ni to phytoavailable forms. Traditional chemical soil extractants used to estimate phytoavailability of trace e l em en ts a re of limi t ed us e t o p re dic t Ni phytoavailability to 'metal crop' species and hence Ni uptake.

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