title: In situ stabilization of trace metals in a copper-contaminated soil using P-spiked Linz-Donawitz slag.
abstract: OBJECTIVE
  A former wood exploitation revealing high Cu and As concentration of the soils served as a case study for assisted phytoextraction.
  
  
  METHODS
  P-spiked Linz-Donawitz (LD) slag was used as a soil additive to improve physico-chemical soil properties and in situ stabilize Cu and other trace metals in a sandy Cu-contaminated soil (630 mg kg⁻¹ soil). The LD slag was incorporated into the contaminated soil to consist four treatments: 0% (T1), 1% (T2), 2% (T3), and 4% (T4). A similar uncontaminated soil was used as a control (CTRL). After a 1-month reaction period, potted soils were used for a 2-week growth experiment with dwarf beans.
  
  
  RESULTS
  Soil pH increased with the incorporation rate of LD slag. Similarly the soil electrical conductivity (EC, in millisiemens per centimetre) is ameliorated. Bean plants grown on the untreated soil (T1) showed a high phytotoxicity. All incorporation rates of LD slag increased the root and shoot dry weight yields compared to the T1. The foliar Ca concentration of beans was enhanced for all LD slag-amended soil, while the foliar Mg, K, and P concentrations were not increased. Foliar Cu, Zn, and Cr concentrations of beans decreased with the LD slag incorporation rate.
  
  
  CONCLUSIONS
  P-spiked LD slag incorporation into polluted soil allow the bean growth and foliar Ca concentration, but also to reduce foliar Cu concentration below its upper critical value avoiding an excessive soil EC and Zn deficiency. This dual effect can be of interest for soil remediation at larger scale.
authors.affiliation: Université de Bordeaux, EA 4592 Géoressources & Environnement, Institut EGID, 1 Allée F. Daguin, 33607 Pessac, France.
authors.forename: Osama
authors.initials: O
authors.lastname: Negim
authors.forename: Michel
authors.initials: M
authors.lastname: Mench
authors.forename: Clémence
authors.initials: C
authors.lastname: Bes
authors.forename: Mikael
authors.initials: M
authors.lastname: Motelica-Heino
authors.forename: Fouad
authors.initials: F
authors.lastname: Amin
authors.forename: Frédéric
authors.initials: F
authors.lastname: Huneau
authors.forename: Philippe
authors.initials: P
authors.lastname: Le Coustumer
mesh_terms: D002118:Calcium / Q000032:analysis; D055598:Chemical Phenomena; D002857:Chromium / Q000032:analysis; D003300:Copper / Q000032:analysis / Q000737:chemistry*; D004553:Electric Conductivity; D052918:Environmental Restoration and Remediation / Q000379:methods; D005308:Fertilizers / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis*; D008669:Metallurgy; D027805:Phaseolus / Q000737:chemistry / Q000254:growth & development; D010710:Phosphates / Q000032:analysis / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry / Q000254:growth & development; D018520:Plant Shoots / Q000737:chemistry / Q000254:growth & development; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*; D012995:Solubility; D013052:Spectrometry, X-Ray Emission; D014131:Trace Elements / Q000032:analysis / Q000737:chemistry*; D015032:Zinc / Q000032:analysis
chemical_list: D005308:Fertilizers; D007220:Industrial Waste; D010710:Phosphates; D012987:Soil; D012989:Soil Pollutants; D014131:Trace Elements; D002857:Chromium; D003300:Copper; D015032:Zinc; D002118:Calcium