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Navegando Artículos en revistas científicas por Autor "Cabo, L. de"

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  • Miniatura
    ÍtemAcceso Abierto
    Effect of stabilization time and soil chromium concentration on Sesbania virgata growth and metal tolerance
    (Journal of Environmental Management. Elsevier., 2023-08) Rodríguez, N. ; Carusso, S. ; Juárez, A. ; El Kassisse, Y. ; Rodríguez Salemi, V. ; Cabo, L. de
    Sesbania virgata is a pioneer shrub from the Fabaceae family, native to riparian environments in northeast of Argentina, southern of Brazil and Uruguay. In peri-urban riparian soils, metal contamination is a frequent problem, being its bioavailability partly determined by the stabilization time and frequency of contamination events. The effect of time elapsed between chromium (Cr) soil enrichment and plant seeding and Cr doses on S. virgata tolerance and metal absorption were evaluated. Treatments were developed by adding Cr (80–400 ppm) to the soil and allowing two days or fifteen months to elapse before sowing, and a control treatment without Cr addition. After 150 days from seeding, bioaccumulation and translocation factors, growth parameters (dry biomass and its aerial/radical allocation pattern, stem length and its elongation rate), morphological parameters (root volume and leaf area), and physiological parameters (chlorophyll content) of the specimens were determined. The emergence of S. virgata was inhibited since 150 ppm when Cr was added to the soil two days before seeding, with Cr accumulation in roots starting at 80 ppm (17.4 ± 2.5 mg/kg). Under 15 months of metal stabilization, S. virgata plants survived across the entire range of Cr doses tested, with accumulation in roots since 100 ppm (35.5 ± 0.2 mg/kg) and metal translocation to aerial tissues only under 400 ppm. The results obtained showed that S. virgata did not have high BCF and TF values, suggesting that it cannot be classified as bioaccumulator of Cr under the tested conditions. However, its presence in environments contaminated with Cr can be beneficial, as it helps to stabilize the metal in the soil.
  • Miniatura
    ÍtemAcceso Abierto
    Evaluación de la tolerancia y remoción de cromo (VI) en tres especies de macrófitas flotantes
    (Ingeniería Sanitaria y Ambiental, 2015) Gómez, B. ; Rodrigez Salemi, V.; El Kassisse, Y. ; Gómez, C. ; Cabo, L. de
    La contaminación de los sistemas acuáticos con metales, se puede producir como consecuencia del vertido de eflentes industriales con tratamientos inadecuados o sin tratamiento. Los metales son altamente persistentes en el ambiente y pueden ser muy tóxicos para la biota, bioacumularse en los tejidos de los organismos y depositarse en los sedimentos. A través de diferentes mecanismos de fitorremediación con plantas acuáticas, es posible extraer metales de las aguas residuales y promover la restauración de ambientes contaminados. El objetivo de este estudio es evaluar la tolerancia de tres especies de plantas fltantes (Lemna gibba, Salvinia minima y Azolla fiiculoides) a la exposición de cromo, así como su efiiencia para removerlo. Las plantas fueron expuestas individualmente y por triplicado (ensayo tipo batch) en reactores de plástico con un litro de medio de cultivo a diferentes concentraciones de cromo (1,5, 10 y 20 mg/L). Los ensayos se llevaron a cabo durante 6 días, en condiciones de invernadero con fotoperiodo natural, a una temperatura entre 20 y 24°C. Paralelamente, se realizaron controles bajo las mismas condiciones, pero sin el agregado de cromo. Se determinó la cantidad de cromo total bioacumulado en el tejido de las plantas y la cantidad de cromo total remanente en el agua. Las tres especies estudiadas mostraron ser tolerantes a la máxima concentración ensayada (20 mg Cr/L) y los niveles de cromo acumulados en los tejidos, permiten inferir que constituyen una herramienta factible de aplicar en el tratamiento de sitios contaminados con ese metal.
  • Miniatura
    ÍtemAcceso Abierto
    Metals uptake by Sagittaria montevidensis in contaminated riparian area of Matanza-Riachuelo River (Argentina)
    (Springer Nature Switzerland. SN Appl. Sci., 2020-11-10) Gómez, B.; Reale, M.; El Kassisse, Y.; Mujica, C.; Gómez, C.; Cabo, L. de; Rodríguez Salemi, V.
    The objective of this study was to evaluate the accumulation and uptake of Cr, Zn, Cu, Ni and Pb in Sagittaria montevidensis growing in highly contaminated riparian soils of Matanza Riachuelo Basin (MRB). It is a native and very abundant riparian plant exposed to heavy metal contamination. Samples of S. montevidensis, rhizosphere riparian soil and water were collected at three sites in the lower MR basin. The accumulation and the level of translocation of Cr, Zn, Cu, Ni and Pb in this species were determined. The soils were found to be the main reservoirs of metals (2225 mg Cr kg−1 d.w., 367 mg Cu kg−1 d.w., 61 mg Ni kg−1 d.w., 239 mg Pb kg−1 d.w., and 1495 mg Zn kg−1 d.w.). All studied metals were uptaken, but Zn and Cu were the most accumulated metals (426 ± 28 mg kg−1 d.w. and 129 ± 28 mg kg−1 d.w., respectively). S. montevidensis was an accumulator species for Cu and Ni (Translocation Factor (TF) > 1) and it showed an exclusionary behavior (TF < 1) for Cr, Pb, and Zn. Cu was mostly accumulated in the aerial biomass. The rest of the metals analyzed were mainly accumulated in the roots. The analyzed plant specimens did not show signs of stress, having completed their phenological states. This native species shows high tolerance of metals. Then the preservation and revegetation of this species in the riparian areas constitute a sustainable alternative for ecological restoration.