Influence of biochars, compost and iron grit, alone and in combination, on copper solubility and phytotoxicity in a Cu-contaminated soil from a wood preservation site.
Two biochars, a green waste compost and iron grit were used, alone and in combination, as amendment to improve soil properties and in situ stabilize Cu in a contaminated soil (964mgCukg(-1)) from a wood preservation site. The pot experiment consisted in 9 soil treatments (% w/w): untreated Cu-contaminated soil (Unt); Unt soil amended respectively with compost (5%, C), iron grit (1%, Z), pine bark-derived biochar (1%, PB), poultry-manure-derived biochar (1%, AB), PB or AB+C (5%, PBC and ABC), and PB or AB+Z (1%, PBZ and ABZ). After a 3-month reaction period, the soil pore water (SPW) was sampled in potted soils and dwarf beans were grown for a 2-week period. In the SPW, all amendments decreased the Cu(2+) concentration, but total Cu concentration increased in all AB-amended soils due to high dissolved organic matter (DOM) concentration. No treatment improved root and shoot DW yields, which even decreased in the ABC and ABZ treatments. The PBZ treatment decreased total Cu concentration in the SPW while reducing the gap with common values for root and shoot yields of dwarf bean plants. A field trial is underway before any recommendation for the PB-based treatments.
UMR BIOGECO INRA 1202, Diversity and Functioning of Communities, University of Bordeaux, Bât. B2, allée Geoffroy St-Hilaire, CS50023, F-33615 Pessac cedex, France; INRA, UMR BIOGECO INRA 1202, 69 Route d'Arcachon, 33610 Cestas, France. Electronic address: oustriere.nadege@gmail.com.
Nadège
N
Oustriere
UMR BIOGECO INRA 1202, Diversity and Functioning of Communities, University of Bordeaux, Bât. B2, allée Geoffroy St-Hilaire, CS50023, F-33615 Pessac cedex, France; INRA, UMR BIOGECO INRA 1202, 69 Route d'Arcachon, 33610 Cestas, France. Electronic address: marchand.lilian@gmail.com.
Lilian
L
Marchand
UMR BIOGECO INRA 1202, Diversity and Functioning of Communities, University of Bordeaux, Bât. B2, allée Geoffroy St-Hilaire, CS50023, F-33615 Pessac cedex, France; INRA, UMR BIOGECO INRA 1202, 69 Route d'Arcachon, 33610 Cestas, France. Electronic address: galland.william@outlook.fr.
William
W
Galland
UMR BIOGECO INRA 1202, Diversity and Functioning of Communities, University of Bordeaux, Bât. B2, allée Geoffroy St-Hilaire, CS50023, F-33615 Pessac cedex, France; INRA, UMR BIOGECO INRA 1202, 69 Route d'Arcachon, 33610 Cestas, France. Electronic address: lunelgabon@gmail.com.
Lunel
L
Gabbon
ISTO UMR 7327-CNRS, University of Orléans, campus géosciences, 1A, rue de la ferollerie, 45071 Orléans cedex 2, France. Electronic address: nathalie.lottier@univ-orleans.fr.
Nathalie
N
Lottier
ISTO UMR 7327-CNRS, University of Orléans, campus géosciences, 1A, rue de la ferollerie, 45071 Orléans cedex 2, France. Electronic address: mikael.motelica@univ-orleans.fr.
Mikael
M
Motelica
UMR BIOGECO INRA 1202, Diversity and Functioning of Communities, University of Bordeaux, Bât. B2, allée Geoffroy St-Hilaire, CS50023, F-33615 Pessac cedex, France; INRA, UMR BIOGECO INRA 1202, 69 Route d'Arcachon, 33610 Cestas, France. Electronic address: mench@bordeaux.inra.fr.
Michel
M
Mench
D001673:Biodegradation, Environmental; D002606:Charcoal / Q000032:analysis*; D000076282:Composting; D003300:Copper / Q000633:toxicity*; D005602:France; D007501:Iron / Q000737:chemistry*; D027805:Phaseolus / Q000737:chemistry / Q000187:drug effects* / Q000254:growth & development; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000633:toxicity*; D012995:Solubility
D012987:Soil; D012989:Soil Pollutants; C540010:biochar; D002606:Charcoal; D003300:Copper; D007501:Iron
Copper contamination; In situ stabilization; Phaseolus vulgaris L.; Soil pore water; Soil remediation