Plant and Soil

, Volume 379, Issue 1–2, pp 275–287

Prediction of the edaphic factors influence upon the copper and cobalt accumulation in two metallophytes using copper and cobalt speciation in soils

  • Bastien Lange
  • Michel-Pierre Faucon
  • Pierre Meerts
  • Mylor Shutcha
  • Grégory Mahy
  • Olivier Pourret
Regular Article

Abstract

Background and aims

Among the unique flora on copper and cobalt rich soils, some species are able to hyperaccumulate the Cu and Co in their shoots, however, the unexplained high variations of Cu and Co concentrations in shoots have been highlighted. A good comprehension of the Cu and Co accumulation variations would go through a characterization of the Cu and Co speciation in soils. We examined the covariations of Cu and Co speciation in soils and Cu and Co concentrations in plants.

Methods

Plant samples of two species and soil samples (n = 146) were collected in seven pedogeochemically contrasted sites. Cu and Co speciation in soils was modeled by WHAM 6.0.

Results

Variation in copper accumulation in plant shoots were mostly influenced by Cu adsorbed by the Mn and Fe oxides fractions, whereas Co accumulation variations were strongly influenced by Co free and Co adsorbed by the OM and Fe fractions.

Conclusions

Availability of Cu and Co seems to be species-specific and is not explained only by the free Cu and Co content in the soil solution, but also strongly by the part linked to colloidal fractions. Availability of Cu and Co is a complex mechanism, closely related to all the biogeochemical processes which occur in the rhizosphere. Future work should perform experiments in controlled conditions to examine the soil parameters that influence the Cu and Co availability.

Keywords

Chemical speciation Copper Cobalt Hyperaccumulation Metal availability WHAM 6 

Abbreviations

MnOX

Manganese oxides

FeOx

Iron oxides

HM

Humic material

OM

Organic matter

-MnOx

Bound to manganese oxides

-FeOx

Bound to iron oxides

-OM

Bound to organic matter

SD

Standard deviation

Supplementary material

11104_2014_2068_MOESM1_ESM.docx (117 kb)
Table S1(DOCX 117 kb)

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Bastien Lange
    • 1
    • 2
  • Michel-Pierre Faucon
    • 1
  • Pierre Meerts
    • 2
  • Mylor Shutcha
    • 4
  • Grégory Mahy
    • 3
  • Olivier Pourret
    • 1
  1. 1.HYdrISE (Hydrogeochemistry Interactions Soil Environment) unit, UP.2012.10.102Institut Polytechnique LaSalle Beauvais (ISAB-IGAL)BeauvaisFrance
  2. 2.Laboratory of Plant Ecology and BiogeochemistryUniversité Libre de BruxellesBrusselsBelgium
  3. 3.Departement of Forest, Nature and Landscape, Biodiversity and Landscape Unit, Gembloux Agro-Bio TechUniversity of LiègeGemblouxBelgium
  4. 4.Faculté des Sciences AgronomiquesUniversité de LubumbashiLubumbashiDemocratic Republic of Congo

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