title: Aided phytostabilization of a trace element-contaminated technosol developed on steel mill wastes.
abstract: Aided phytostabilization of a barren, alkaline metal(loid)-contaminated technosol developed on steel mill wastes, with high soluble Cr and Mo concentrations, was assessed in a pot experiment using (1) Ni/Cd-tolerant populations of Festuca pratensis Huds., Holcus lanatus L., and Plantago lanceolata L. sowed in mixed stand and (2) six soil treatments: untreated soil (UNT), ramial chipped wood (RCW, 500m3ha-1), composted sewage sludge (CSS, 120t DW ha-1), UNT soil amended with compost (5% w/w) and either vermiculite (5%, VOM) or iron grit (1%, OMZ), and an uncontaminated soil (CTRL). In the CSS soil, pH and soluble Cr decreased whereas soluble Cu, K, Fe, Mn, Mg, Ni and P increased. The RCW treatment enhanced soluble Fe, Mn, and Mg concentrations. After 15 weeks, shoot DW yield and shoot Cd, Cu, Fe, Mn, Mo, Zn, and Mg removals peaked for F. pratensis grown on the CSS soil, with lowest shoot Cr, Ni and Mo concentrations. Holcus lanatus only grew on the CTRL, UNT, and CSS soils and P. lanceolata on the CTRL soil. Best treatment, F. pratensis grown on the CSS soil, led to a dense grass cover but its shoot Mo concentration exceeded the maximum permitted concentration in forage.
authors: BIOGECO, INRA, Univ. Bordeaux, 33615 Pessac, France. Electronic address: oustriere.nadege@gmail.com.
authors: Nadège
authors: N
authors: Oustriere
authors: BIOGECO, INRA, Univ. Bordeaux, 33615 Pessac, France. Electronic address: marchand.lilian@gmail.com.
authors: Lilian
authors: L
authors: Marchand
authors: ENSM-SE Centre SPIN, 158 cours Fauriel, 42023 St Etienne, France. Electronic address: bouchardon@emse.fr.
authors: Jean Luc
authors: JL
authors: Bouchardon
authors: ENSM-SE Centre SPIN, 158 cours Fauriel, 42023 St Etienne, France; Université Jean Monnet, 23 rue Dr. Paul Michelon, 42100 St Etienne, France. Electronic address: ofaure@emse.fr.
authors: Olivier
authors: O
authors: Faure
authors: ENSM-SE Centre SPIN, 158 cours Fauriel, 42023 St Etienne, France. Electronic address: moutte@emse.fr.
authors: Jacques
authors: J
authors: Moutte
authors: BIOGECO, INRA, Univ. Bordeaux, 33615 Pessac, France. Electronic address: mench@bordeaux.inra.fr.
authors: Michel
authors: M
authors: Mench
keywords: Chromium; Composted sewage sludge; Festuca pratensis L.; Molybdenum; Nickel