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Proyectos de Investigación y Desarrollo

PHYTOREMEDIATING ACTIVITY OF Baccharis latifolia (Ruiz & Pav.) Per IN SOILS CONTAMINATED


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Investigación básica

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Phytoremediation is a technique with a lower impact on the environment than other economic alternatives. It uses species that accumulate metals in their organs during their development. This study tested the capacity of the species Baccharis latifolia (Ruiz & Pav.) Per to accumulate heavy metals like cadmium, chromium, lead, cobalt and arsenic in order to determine if it is a potentially useful species for phytoremediation. Samples of the species were collected in the vicinity of the municipality of Villapinzón (upper basin of the Bogotá river), a sector where waters and soils are highly contaminated by heavy metals produced, over decades, by the local tannery industries, which shed their wastes into the river without any type of treatment and have caused health problems for the inhabitants. The samples of the Baccharis latifolia (Ruiz & Pav.) Per species, along with the soil where it grows, were collected in Villapinzón (problem plant) and the control plants were gathered in the municipality of La Calera-Cundinamarca. Each of the organs (leaves, stem, root) and the soil were subjected to a digestion process with hydrochloric acid and nitric acid 1:1 to obtain chlorides and nitrates, with the subsequent quantification of the heavy metals by the atomic absorption technique. The analyzed metals were: cadmium, chromium, cobalt, lead and arsenic. We obtained high concentrations of arsenic in the leaves (103.91 mg / kg) and stems (480.45 mg / kg). The levels of chromium in the leaves were: 19.54 mg / kg and in the stems: 136.40 mg / kg. The highest levels of arsenic in the roots and soil were 491.97 mg / kg and 461.77 mg / kg; And for chromium: 185.09 mg / kg, 1,294.43 mg / kg respectively. The study shows that the plant has a strong potential for phytoremediation in the area

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Documentos SILAE_2017_VF2.pdf_franco.pdf

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