Examinando por Autor "Arias-Saldarriaga, S. C. (Sandra Cristina)"

Mostrando 1 - 2 de 2
  • Miniatura
    PublicaciónAcceso abierto
    Lixiviación de nitratos en dos suelos al alterar sus propiedades físicas
    (2014-05-06) Arias-Saldarriaga, S. C. (Sandra Cristina); Pérez-Naranjo, J. C. (Juan Carlos); Rueda, O. M. ()Orfely María)
    Two experiments in columns were carried out, to study how changes in organic matter and sand content of soil could affect its ability to retain added nitric nitrogen. Mixtures of A and B horizons or quartz sand and B horizon taken from soils belonging to Andisol and Oxisol orders, let us artificially change organic matter and sand content in each soil before a nitrate leaching test. Changes in sand content significantly reduce the ability to retain nitric nitrogen in both soils, and organic matter reduction accounted for a increase in nitrate leaching only in the Andisol. A brief discussion is shown, about the possible role of another conditions influencing nitrate leaching in this soils.
  • Miniatura
    PublicaciónAcceso abierto
    Seguimiento de una celda experimental de residuos sólidos urbanos
    (2014-05-07) Arias-Saldarriaga, S. C. (Sandra Cristina); Agudelo-Garcia, R. A. (Rubén Alberto)
    The urban solid wastes generation is a consequence of the human beings’ different activities carried out daily in a municipality. The magnitude of the environmental impact generated is local or regional, depending on how the waste management and disposal are carried out. An experiment was designed in order to study, during six months, variables related to the decomposition and stabilization of the urban solid wastes, some of them dealing with the waste and others with the leachate. From the beginning of the experimentation it was specified that there is an outstanding factor in the observed waste, and it is the exposal to rainfall. Therefore, two experiments with the same conformation conditions, but one subjected to the rain incidence, and other protected by a cover were carried out.