Cinética de Absorción de Plomo en Especies Vegetativas Previo a Procesos de Fitorremediación de Suelos Altamente Contaminados

Translated title of the contribution: Lead Absorption Kinetics in Vegetative Species Prior to Phytoremediation Processes of Highly Contaminated Soils

Elena Del Rocio Coyago Cruz, Sara Maria Bonilla Valencia

Research output: Contribution to journalArticle

Abstract

Industrialization, population growth and inappropriate disposal of hazardous wastes have generated severe contamination episodes in soil, air and water. The objective of this study was to evaluate the kinetics of heavy metal uptake in three vegetative species Amaranthus hybrideus (amaranth), Beta Vulgaris (chard) and Medicago sativa (alfalfa) transplanted in highly contaminated soils at 2.5, 5 and 10% lead concentrations and evaluated by flame atomic absorption spectrophotometry after acid digestion; the evolution of the uptake process was quantified at 0, 20, 30, 30, 45, 60 and 90 days. The results reported that the higher the biomass value, the higher the lead absorption, this was due to the fact that lead had more space for its deposition; on the other hand, all the species presented detoxification stages when they reached a maximum absorption, this stage being less pronounced in alfalfa and chard. In the case of species with higher biomass, the detoxification stage lasted approximately 10 days with phytoremediation percentages of 90%, while species with lower biomass after 70 days did not manage to recover their absorption power, reporting maximum phytoremediation values of 25%, Therefore, any phytoremediation process should be accompanied by the kinetics of heavy metal absorption in vegetative species, since the detoxification stages make the soil remediation process less effective, with the probability of reaching very low decontamination rates.
Translated title of the contributionLead Absorption Kinetics in Vegetative Species Prior to Phytoremediation Processes of Highly Contaminated Soils
Original languageSpanish (Ecuador)
Pages (from-to)47-58
Number of pages12
JournalRevista de Investigación en Ciencias Agronómicas y Veterinarias
Volume3
Issue number3
DOIs
StatePublished - 15 Apr 2020

Keywords

  • Absorption kinetics
  • Phytoremediation
  • Soil contamination

CACES Knowledge Areas

  • 8515A Biodiversity

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