Chrysotile Dissolution in the Rhizosphere of the Nickel Hyperaccumulator <i>Leptoplax emarginata</i>

Chardot-Jacques, Vanessa; Calvaruso, Christophe; Simon, Bruno; Turpault, Marie–Pierre; Echevarria, Guillaume; Morel, Jean-Louis

doi:10.1021/es301229m

Cited by 26 publications

(9 citation statements)

References 30 publications

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“…Chelator-based extractants based on synthetic amino-polycarboxylic acids include EDTA and DTPA. The DTPA (Diethylene triamine pentaacetic acid) method was originally developed to diagnose deficiency of micronutrients in soils (Lindsay and Norvell, 1978), but has been widely used for studies with ultramafic soils (L'Huillier and Edighoffer, 1996;Echevarria et al, 1998Echevarria et al, , 2006Lazarus et al, 2011;Chardot-Jacques et al, 2013;Ünver et al, 2013). The DTPA-extract is made up of 0.005 M DTPA with 0.01 M CaCl 2 and is buffered at pH 7.3 with 0.01 M triethanolamine (TEA).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Evaluating soil extraction methods for chemical characterization of ultramafic soils in Kinabalu Park (Malaysia)

Ent

Nkrumah

Tibbett

et al. 2019

Journal of Geochemical Exploration

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Soils derived from ultramafic bedrock are known for hosting distinct vegetation types as a consequence of atypical soil chemistries consisting of high trace elements concentrations (Ni, Cr, Co) and exchangeable cation imbalances (high Mg:Ca quotients). Ecological studies use a range of single-stage extraction methods for chemical characterization of such soils in order to be able to interpret plant response, and ultimately to explain plant community composition. Few studies to date have compared different soil extraction methods in relation to tropical ultramafic soils. This study compares eight commonly used extraction methods on a large number of ultramafic soil samples collected from Kinabalu Park (Malaysia). The tested methods were: for trace elements: NH 4 AC, DTPA, CaCl 2 , Sr(NO 3) 2 and Mehlich-3, for exchangeable cations: NH 4 Ac and silverthiorea, and for plant-available phosphorus: Mehlich-3 and Olsen-P. These single-stage extraction methods were compared and evaluated for predictive power for chemically characterizing soils, interrelatedness and ecological application. The methods were also contrasted with a sequential extraction scheme. Finally, several operational parameters including molar ratio (0.01 and 0.1 M CaCl 2 , Sr(NO 3) 2) and pH buffering (DTPA-TEA) were also evaluated. The majority of single-stage extraction methods are highly inter-correlated and predictive power could be improved by including independent soil parameters (pH, CEC, pseudo-total element concentration) in the multivariate regression equation. Ecological interpretation remains difficult because of lack of experimental studies in relation to plant uptake response and potential phytotoxicity effects on tropical native plants from ultramafic soils.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Evaluating soil extraction methods for chemical characterization of ultramafic soils in Kinabalu Park (Malaysia)

Ent

Nkrumah

Tibbett

et al. 2019

Journal of Geochemical Exploration

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“…Experiments have shown that the chelating activity of exudates from some fungi and lichen (which has a fungal component) modify the chemical composition of chrysotile fibres in vitro, affecting their chemical reactivity and structure and potentially altering toxicity. These organism-driven weathering processes can reduce chrysotile fibre toxicity (Daghino et al, 2006(Daghino et al, , 2009, and accordingly increase iron (Fe), magnesium (Mg) and nickel (Ni) concentrations in surrounding substrates (Chardot-Jacques et al, 2013). These dissolved elements could provide plant nutrition but can also be lost though leachate (Chardot-Jacques et al, 2013).…”

Section: Bioweatheringmentioning

confidence: 99%

“…These organism-driven weathering processes can reduce chrysotile fibre toxicity (Daghino et al, 2006(Daghino et al, , 2009, and accordingly increase iron (Fe), magnesium (Mg) and nickel (Ni) concentrations in surrounding substrates (Chardot-Jacques et al, 2013). These dissolved elements could provide plant nutrition but can also be lost though leachate (Chardot-Jacques et al, 2013). In one experimental study, the iron released was not incorporated into the fungal biomass (Daghino et al, 2008), but the fungi's progressive removal of reactive iron ions, which are responsible for asbestos's DNA damage, was encouraging (Daghino et al, 2006).…”

Section: Bioweatheringmentioning

confidence: 99%

Challenging Global Waste Management – Bioremediation to Detoxify Asbestos

Wallis

Emmett

Hardy

et al. 2020

Front. Environ. Sci.

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As the 21st century uncovers ever-increasing volumes of asbestos and asbestos-contaminated waste, we need a new way to stop ‘grandfather’s problem’ from becoming that of our future generations. The production of inexpensive, mechanically strong, heat resistant building materials containing asbestos has inevitably led to its use in many public and residential buildings globally. It is therefore not surprising that since the asbestos boom in the 1970s, some 30 years later, the true extent of this hidden danger was exposed. Yet, this severely toxic material continues to be produced and used in some countries, and in others the disposal options for historic uses – generally landfill – are at best unwieldy and at worst insecure. We illustrate the global scale of the asbestos problem via three case studies which describe various removal and/or end disposal issues. These case studies from both industrialised and island nations demonstrate the potential for the generation of massive amounts of asbestos contaminated soil. In each case, the final outcome of the project was influenced by factors such as cost and land availability, both increasing issues, worldwide. The reduction in the generation of asbestos containing materials will not absolve us from the necessity of handling and disposal of contaminated land. Waste treatment which relies on physico-chemical processes is expensive and does not contribute to a circular model economy ideal. Although asbestos is a mineral substance, there are naturally occurring biological-mediated processes capable of degradation (such as bioweathering). Therefore, low energy options, such as bioremediation, for the treatment for asbestos contaminated soils are worth exploring. We outline evidence pointing to the ability of microbe and plant communities to remove from asbestos the iron that contributes to its carcinogenicity. Finally, we describe the potential for a novel concept of creating ecosystems over asbestos landfills (‘activated landfills’) that utilize nature’s chelating ability to degrade this toxic product effectively.

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“…However, it is evident that plants secrete organic acids or amino acids intended for the chelation of metallic elements (Briat and Lebrun, 1999;Puschenreiter et al, 2003;Wenzel et al, 2003). Some hyperaccumulators may also enhance mineral dissolution to improve their Ni uptake (Chardot-Jacques et al, 2013). This contribution modified the soil edaphic conditions and may increase the bioavailable Ni content and consequently may potentially modify its Ni isotopic signature.…”

Section: Implications For the Ni Cycle In Surface Soilsmentioning

confidence: 99%

The behavior of nickel isotopes at the biogeochemical interface between ultramafic soils and Ni accumulator species

Ratié

Quantin

Freitas

et al. 2019

Journal of Geochemical Exploration

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Ultramafic derived soils are characterized by low nutrient soils, a low Ca:Mg ratio, and high metal contents such as Ni, Co and Cr. The vegetation growing on these soils is highly adapted and includes both Ni hyperaccumulator and accumulator species. Today, approximately 530 Ni hyperaccumulator species are listed worldwide and the Ni concentration can be extremely high, e.g. up to 25% in latex from Pycnandra acuminata (Sapotaceae), a tree found in New Caledonia. The aim of this study is to identify the potential role of Ni hyperaccumulator plants in the Ni biogeochemical cycle at the soil surface by using Ni isotopes. A set of Ni hyperaccumulator and Ni accumulator plants as well as topsoils were sampled on the Barro Alto and Niquelândia ultramafic complexes (Goiás State, Brazil). Three Ni hyperaccumulator plants were collected: Justicia lanstyakii, Heliotropium aff. salicoides, Cnidoscolus aff. urens, as well as one Ni accumulator plant, Manihot sp. The isotopic compositions of the whole plants were determined and compared to those of the bulk topsoils and DTPA-extractable Ni. The topsoils exhibited δ 60 Ni values ranging from −0.30 ± 0.06‰ to 0.16 ± 0.05‰. The DTPA-extractable Ni in the topsoils ranged from 94 to 623 mg kg −1 , i.e. 0.9-4.9% of the total soil Ni and was found to be isotopically heavier than the corresponding topsoil (from −0.30 ± 0.05‰ to 0.34 ± 0.08‰). The δ 60 Ni values for the Ni accumulator plants showed an enrichment in heavy Ni isotopes in the aerial parts of the plant compared to the roots, whereas similar δ 60 Ni values for the roots, stems and aerial parts suggested that no significant fractionation results from Ni uptake and translocation in Ni hyperaccumulator plants. Moreover, the aerial parts (i.e. leaves and flowers) from all of the plants analyzed showed the highest Ni concentrations and the heaviest δ 60 Ni values up to 1.21 ± 0.05‰. The enrichment in heavy Ni isotopes in the leaves (0.09 ± 0.06‰ < Δ 60 Ni leaves-soil < 1.06 ± 0.03‰) may result in a heavy Ni input in the litter during organic matter restitution. There is a non-negligible amount of Ni uptake by Ni accumulator and Ni hyperaccumulator plants and this may modify both the Ni isotope composition at the soil-plant interface and the overall cycle of Ni in surface soils Highlights ► DTPA extractable Ni in topsoil is isotopically heavier than the total Ni pool. ► Ni-accumulators exhibit enrichment in Ni heavy isotopes in aerial parts. ► Similar δ 60 Ni values for each plant compartment are observed for Ni-hyperaccumulators. ► Enrichment in heavy Ni isotopes in leaves may lead to a heavy Ni input in the litter.

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Chrysotile Dissolution in the Rhizosphere of the Nickel Hyperaccumulator Leptoplax emarginata

Cited by 26 publications

References 30 publications

Evaluating soil extraction methods for chemical characterization of ultramafic soils in Kinabalu Park (Malaysia)

Evaluating soil extraction methods for chemical characterization of ultramafic soils in Kinabalu Park (Malaysia)

Challenging Global Waste Management – Bioremediation to Detoxify Asbestos

The behavior of nickel isotopes at the biogeochemical interface between ultramafic soils and Ni accumulator species

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