Please use this identifier to cite or link to this item:
Title: Biodegradable chelate enhances the phytoextraction of copper by Oenothera picensis grown in copper-contaminated acid soils
Author: González Miranda, María Isabel
Cortés Lucas, Amparo
Neaman, Alexander
Rubio Romero, Patricio
Keywords: Plantes
Mines de coure
Contaminació dels sòls
Copper mines
Soil pollution
Issue Date: 2011
Publisher: Elsevier Ltd
Abstract: Oenothera picensis plants grow in the acid soils contaminated by copper smelting in the coastal region of central Chile. We evaluated the effects of the biodegradable chelate MGDA on copper extraction by O. picensis and on leaching of copper through the soil profile, using an ex situ experiment with soil columns of varying heights. MGDA was applied in two doses, one month apart, at concentrations of 0 (control), 2, 6 and 10 mmol plant-1. MGDA application significantly increased biomass production and foliar concentration, permitting an effective increase in copper extraction, from 0.09 mg plant-1 in the control, to 1.3 mg plant-1 in the 6 and 10 mmol plant-1 treatments. With 10 mmol plant-1 of MGDA, the copper concentration in the leachate from the 30 cm columns was 20 times higher than in the control. For the 60 cm columns, copper concentration was 2 times higher than the control. It can be concluded that at increased soil depths, copper leaching would be minimal and that MGDA applications at the studied concentrations would not pose a high risk for leaching into groundwater. It can thus be stated that applications of MGDA are an effective and environmentally safe way to improve copper extraction by O. picensis in these soils.
Note: Versió postprint del document publicat a:
It is part of: Chemosphere, 2011, vol. 84, p. 490-496
Related resource:
ISSN: 0045-6535
Appears in Collections:Articles publicats en revistes (Biologia, Sanitat i Medi Ambient)
Articles publicats en revistes (Geografia)

Files in This Item:
File Description SizeFormat 
590045.pdf594.5 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.