title: Simultaneous hyperaccumulation of multiple heavy metals by Helianthus annuus grown in a contaminated sandy-loam soil.
abstract: Phytoremediation is a promising means for the treatment of contamination arising from heavy metal spills. Although several species have been identified as hyperaccumulators, most of the studies were performed with only one heavy metal. Experiments were conducted with two cultivars of H. annuus exposed to different combinations of metal contamination (30 mg/kg Cd, Cr, Ni, As, and/or Fe). Cultivar efficiency was based on total metal uptake, as well as translocation and selectivity of each metal. The results for each cultivar were also compared after 0.1 g/kg or 0.3 g/kg EDTA was added to enhance metal bioavailability. The key finding was that H. annuus achieved hyperaccumulator status for multiple metals simultaneously: Cd, Cr, and As.
authors.affiliation: Department of Civil Engineering, The University of Akron, Akron, OH 44325-3905, USA. tcutright@uakron.edu
authors.forename: Teresa
authors.initials: T
authors.lastname: Cutright
authors.forename: Nagaraju
authors.initials: N
authors.lastname: Gunda
authors.forename: Firat
authors.initials: F
authors.lastname: Kurt
mesh_terms: D001151:Arsenic / Q000378:metabolism; D002104:Cadmium / Q000378:metabolism; D019187:Cadmium Compounds / Q000378:metabolism; D002712:Chlorides / Q000378:metabolism; D017608:Chromium Compounds / Q000378:metabolism; D005290:Ferric Compounds / Q000378:metabolism; D006368:Helianthus / Q000254:growth & development / Q000378:metabolism*; D008027:Light; D019216:Metals, Heavy / Q000378:metabolism*; D009532:Nickel / Q000378:metabolism; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis*; D013431:Sulfates / Q000378:metabolism
chemical_list: D019187:Cadmium Compounds; D002712:Chlorides; D017608:Chromium Compounds; D005290:Ferric Compounds; D019216:Metals, Heavy; D012989:Soil Pollutants; D013431:Sulfates; D002104:Cadmium; C024823:ferric sulfate; C029938:nickel sulfate; D009532:Nickel; C037123:cadmium sulfate; C017133:chromous chloride; D001151:Arsenic