title: Is vetiver grass of interest for the remediation of Cu and Cd to protect marketing gardens in Burkina Faso?
abstract: In Burkina-Faso, urban vegetable agriculture is often characterized by urban solid waste fertilizer inputs containing heavy metals such as Cu and Cd. Thus, the relevance of surrounding urban vegetable plots with vetiver hedges to reduce environmental pollution by Cu and Cd was investigated by adsorption studies and pot experiments. Vetiver biomass, its metal contents and, its total and MgCl2 extractable soil metals were monitored over 6months in the presence of a mixture of metal at two concentrations: 2-10 and 100-500mgkg(-1), for Cd and Cu, respectively. The Freundlich adsorption coefficient (Kf) values increased after vetiver growth and were significantly higher for vertisol than for lixisol. After 6months, the vetiver that was grown on lixisol accumulated more metal, increasing up to 4635mgkg(-1) for Cu and to 21.8mgkg(-1) for Cd, than did the vetiver that was grown on vertisol, increasing up to 1534mgkg(-1) for Cu and to 7.2mgkg(-1) for Cd. The metal bioconcentration factor, which was significantly higher for Cd, increased with the applied concentration and ranged from 1.6 to 14 for Cu and from 2.3 to 22 for Cd. Additionally, the translocation factors were higher for Cd (0.38-7.3) than for Cu (0.07-2.6), and the translocation was easiest from lixisol than from vertisol. Thus our results demonstrate the ability of vetiver for Cu and Cd phytoremediation in Burkina Faso soils. Nevertheless, these results should be confirmed across the field to advocate the establishment of vetiver hedges.
authors: Université de Lorraine - CNRS, Laboratoire Interdisciplinaire des Environnements Continentaux, BP 70239, 54506 Vandœuvre-lès-Nancy, France.
authors: Norbert
authors: N
authors: Ondo Zue Abaga
authors: Université de Lorraine - CNRS, Laboratoire Interdisciplinaire des Environnements Continentaux, BP 70239, 54506 Vandœuvre-lès-Nancy, France. Electronic address: sylvie.dousset@univ-lorraine.fr.
authors: Sylvie
authors: S
authors: Dousset
authors: Ecole des Mines de Douai, Département Chimie et Environnement, 59508 Douai Cedex, France; Université Lille Nord de France, 59000 Lille, France.
authors: Saliou
authors: S
authors: Mbengue
authors: Université de Lorraine - CNRS, Laboratoire Interdisciplinaire des Environnements Continentaux, BP 70239, 54506 Vandœuvre-lès-Nancy, France.
authors: Colette
authors: C
authors: Munier-Lamy
mesh_terms: D000327:Adsorption; D000383:Agriculture; D001673:Biodegradation, Environmental; D002050:Burkina Faso; D002104:Cadmium / Q000737:chemistry* / Q000493:pharmacokinetics; D049930:Chrysopogon / Q000378:metabolism*; D003300:Copper / Q000737:chemistry* / Q000493:pharmacokinetics; D005308:Fertilizers / Q000032:analysis*; D051639:Gardening / Q000379:methods*; D012989:Soil Pollutants / Q000032:analysis*; D013997:Time Factors
chemical_list: D005308:Fertilizers; D012989:Soil Pollutants; D002104:Cadmium; D003300:Copper
keywords: Adsorption; Bioconcentration; Lixisol; Metal; Translocation; Vertisol