PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
capítulos de libros
Título:
Lindane removal by Streptomyces sp. M7 from Soil Extract Medium and soil samples contaminated with this pesticide
Autor/es:
BENIMELI CLAUDIA S.; AMOROSO MARÍA J.
Libro:
Pesticide Research Trends
Editorial:
Nova Science Publishers, Inc
Referencias:
Lugar: New York; Año: 2007; p. 1 - 25
Resumen:
The g-HCH is an organochlorine pesticide (OP) worldwide used in agriculture and medicine. It has a big tendency to bioaccumulate into the environment and humans. In Salí River, Tucumán, Argentina 10- fold lindane and metoxichlor were detected in relation to the traces permitted concentrations. The development of new technologies to remediate these sites using microorganisms is every time more necessary. The actinomycetes are Gram positive bacteria with great potential to bioremediate xenobiotic compounds. Streptomyces sp. M7, isolated from OP contaminated sediment was selected for its capacity to grow in presence of lindane as only carbon source and to remove it from a culture medium. The aim of this work was to study the bioremediation capacity of Streptomyces sp. M7 in Soil Extract Medium (SEM) and sterile soil contaminated with lindane and to know the pesticide effects on maize plants seeded in lindane contaminated soil previously inoculated with Streptomyces  sp. M.7This microorganism was cultured in SEM added of lindane 100 mg L-1, obtaining a maximal growth of 0.065 mg mL-1, similar to the control, with a highest lindane removal of 70.4% at 30 ºC and pH 7. The variation of initial pesticide concentration (100,150, 200 and 300 mg L-1) in SEM produced an increment of the microbial growth similar in all the tested concentrations. However when these concentrations were added to the sterile soil, the microbial growth was similar to the controls. A decrease of the residual lindane concentration was detected in soils samples in relation to the abiotic controls (29.1; 78.03; 38.81 and 14.42% respectively).