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| Titel |
Phytoextraction and phytostabilisation of metal-contaminated soil in temperate maritime climate of coastal British Columbia, Canada |
| VerfasserIn |
P. K. Padmavathiamma, L. Y. Li |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250020265
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| Zusammenfassung |
| This research addressed the phytoremediation of roadside soils subjected to multi-component
metal solutions. A typical right of way for roads in Canada is around 30 m, and at
least 33% of that land in the right of way is unpaved and can support animal life.
Thus, land associated with 12,000 km of roads in the province of British Columbia
and millions of kilometres around the world represent a substantial quantity of
wildlife habitat where metal contamination needs to be remediated. Phytostabilisation,
requires least maintenance among different phytoremediation techniques, and it
could be a feasible and practical method of remediating in roadside soils along
highways and for improving highway runoff drainage. The suitability of five plant
species was studied for phytoextraction and phytostabilisation in a region with
temperate maritime climate of coastal British Columbia, Canada. Pot experiments were
conducted using Lolium perenne L (perennial rye grass), Festuca rubra L (creeping red
fescue), Helianthus annuus L (sunflower), Poa pratensis L (Kentucky bluegrass) and
Brassica napus L (rape) in soils treated with three different metal (Cu, Pb, Mn and Zn)
concentrations. The bio-metric characters of plants in soils with multiple-metal
contaminations, their metal accumulation characteristics, translocation properties and metal
removal were assessed at different stages of plant growth, 90 and 120 DAS (days after
sowing). Lolium was found to be suitable for the phytostabilisation of Cu and Pb,
Festuca for Mn and Poa for Zn. Metal removal was higher at 120 than at 90 days
after sowing, and metals concentrated more in the underground tissues with less
translocation to the above-ground parts. Bioconcentration factors indicate that Festuca
had the highest accumulation for Cu, Helianthus for Pb and Zn and Poa for Mn. |
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