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Revista LASALLISTA de Investigación

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Browsing Revista LASALLISTA de Investigación by Author "Agudelo Betancur, Lina Marcela"

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    Aislamiento de consorcio de microorganismos degradadores de cianuro
    (Corporación Universitaria Lasallista, 2006) Garcés Molina, Adelaida María; Agudelo Betancur, Lina Marcela; Macías Mazo, Karina Isabel; Salinas Alzate, Natalia Andrea
    Introduction. Cyanide is used in the mining industry to recover gold, in the shape of a solution, from mother material. This compound is highly toxic and generates great environmental problems, therefore several physical and chemical technologies have been developed to solve them. Materials and methods. Three microogranisms´ consortiums were isolated from soils coming from gold mines in the municiple of Amalfi, Antioquia, where the gold extraction is made with mercuriy. o select the most efficient microorganisms the consortiums were cultivated in nutritive broth, increasing the potasium cyanide concentration from 2x10-4 ppm to 2000 ppm. All the process was made under aerobic and anaerobic conditions. Later, the nutritive broth was replaced, step by step, with minimum mineral medium, with 2000 ppm of potasium cyanide as a source of carbon and nitrogen. All the cultivation mediums were prepared at a pH value of 7. During this last stage, the consumed cyanide was quantified with a cyanide selective ion electrode. Results. During the development of this work consortiums of microorganisms were isolated from soils coming from mining zones, and their efficiency for the degradation of potasium cyanide was determined. Conclusion: The biological degradation can be a better alternative to eliminate this contaminant.
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    Fitorremediación: la alternativa para absorber metales pesados de los biosólidos
    (Corporación Universitaria Lasallista, 2005) Agudelo Betancur, Lina Marcela; Macías Mazo, Karina Isabel; Suárez Mendoza, Alfredo José
    Biosolids come from the treatment of waste water. As a special way to solve the problems they bring to environment, phytoremediation becomes an effective and cheap way to guarantee the result of biosolids without high content of contaminants, as heavy metals, and also guarantees that biosolids can be used as manure, among many other uses.
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    Valor biológico de las cucarachas en el compost
    (Corporación Universitaria Lasallista, 2004) Arango Gutiérrez, Gloria Patricia; Agudelo Betancur, Lina Marcela
    Between the fauna living in the compost, the insects play an important role in the transformation processes of the organic material, due to these help in between other functions, to triturate the vegetable material for others to perform transformation processes. For the crockrach, the compost is a proper environment to have a supervivency and reproduction process, besides of the contribution in the transformation processes of the organic materia in fertilize.
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