A phytoremediation field trial was established on a site contaminated with Cu, Pb and Zn in the City of Montreal (Canada) using Brassicajuncea, Salix miyabeana and Salix viminalis. The study compared metal content i...A phytoremediation field trial was established on a site contaminated with Cu, Pb and Zn in the City of Montreal (Canada) using Brassicajuncea, Salix miyabeana and Salix viminalis. The study compared metal content in plant tissues of each species at the end of the first growing season and assessed the effects of EDTA as a chelating agent to increase availability of metals for the plants. Brassicajuncea accumulated more metals (Cu, Pb and Zn) in aerial parts than in roots, whereas the willows accumulated Cu and Pb mainly in roots and Zn in aerial parts (mostly in leaves). EDTA increased metal transfer in Brassica but had no effect on the two willow species. After one growing season, the total biomass yield of Brassica juncea was higher than that of the willows, and consequently, total metal accumulation by the plants was also greater. However, the high yield of willows over several years may make them more successful in brownfield phytoremediation.展开更多
文摘A phytoremediation field trial was established on a site contaminated with Cu, Pb and Zn in the City of Montreal (Canada) using Brassicajuncea, Salix miyabeana and Salix viminalis. The study compared metal content in plant tissues of each species at the end of the first growing season and assessed the effects of EDTA as a chelating agent to increase availability of metals for the plants. Brassicajuncea accumulated more metals (Cu, Pb and Zn) in aerial parts than in roots, whereas the willows accumulated Cu and Pb mainly in roots and Zn in aerial parts (mostly in leaves). EDTA increased metal transfer in Brassica but had no effect on the two willow species. After one growing season, the total biomass yield of Brassica juncea was higher than that of the willows, and consequently, total metal accumulation by the plants was also greater. However, the high yield of willows over several years may make them more successful in brownfield phytoremediation.