Metals Phytoextraction by Cordia africana from Soils Contaminated with Oil Drilling Waste
Sobrinho, Nelson Moura Brasil do Amaral Andrade, André Fernão Martins de Lima, Erica Souto Abreu Zonta, Everaldo Magalhães, Márcio Osvaldo Lima
Metals Phytoextraction by Cordia africana from Soils Contaminated with Oil Drilling Waste
Publicação on-line; 27 ref.; 4 tables; 1 illus.; Summary (En)
Abstract
Oil exploration and production generate large quantities of waste, which may contain contaminants such as barium
and lead. Therefore, more studies aimed at decreasing the levels of heavy metals in contaminated sites, using methods
such as phytoremediation, are needed. In a preliminary assay, samples of soil contaminated with oil drilling waste were
incubated with different concentrations (2 or 6 mmol L-1) of ethylenediaminetetraacetic acid (EDTA). Subsequently,
an experiment was conducted in a greenhouse to evaluate the phytoremediation potential of the tree Cordia africana.
EDTA induced mobilization and translocation of lead, manganese, and iron into the C. africana leaves but had no
effect on barium. The quantity of heavy metal contaminants accumulated in the plant vegetative parts showed that
C. africana cannot be used as a phytoextractor for the tested metals; however, it can be used as a phytostabilizer.
Keywords: contamination, phytoremediation, heavy metals, EDTA.
CONTAMINAÇÃO
METAL PESADO
SOLO
Metals Phytoextraction by Cordia africana from Soils Contaminated with Oil Drilling Waste
Publicação on-line; 27 ref.; 4 tables; 1 illus.; Summary (En)
Abstract
Oil exploration and production generate large quantities of waste, which may contain contaminants such as barium
and lead. Therefore, more studies aimed at decreasing the levels of heavy metals in contaminated sites, using methods
such as phytoremediation, are needed. In a preliminary assay, samples of soil contaminated with oil drilling waste were
incubated with different concentrations (2 or 6 mmol L-1) of ethylenediaminetetraacetic acid (EDTA). Subsequently,
an experiment was conducted in a greenhouse to evaluate the phytoremediation potential of the tree Cordia africana.
EDTA induced mobilization and translocation of lead, manganese, and iron into the C. africana leaves but had no
effect on barium. The quantity of heavy metal contaminants accumulated in the plant vegetative parts showed that
C. africana cannot be used as a phytoextractor for the tested metals; however, it can be used as a phytostabilizer.
Keywords: contamination, phytoremediation, heavy metals, EDTA.
CONTAMINAÇÃO
METAL PESADO
SOLO
BINAGRI