BIORREMOCIÓN DE PLOMO EN SOLUCIÓN POR FIBRAS DE FURCRAEA ANDINA Y BIOPELÍCULAS DE PSEUDOMONAS AERUGINOSA

Abstract:

The objective of this research was to study the bioremoval of lead in solution by fibers of F. andinaand fibers of F. andinawith biofils of P. aeruginosaon its surface. To achieve our objective:(1) P. aeruginosawere isolated and differentiated from contaminated sediment samples from an aquaculture plant.(2) Natural fibers were extracted from F. andinaand characterized.(3) P. aeruginosabiofilms were grown on the surface of F. andinafibers.(4) The smallest amount of lead required to inhibit the growth of P. aeruginosain planktonic state and in biofilms was evaluated.(5) The lead removal potential of fibers F. andinaand F. andinaplus biofilms of P. aeruginosawas evaluated. Our results confirm that the minimum lead concentration (about 500 mg L-1) that substantially inhibits the growth of P. aeuruginosais about 5 times higher when P. aeuruginosa cells form a biofilm when compared to the minimal inhibitory concentration of the cell growth in its planktonic state (approx. 200 mg L-1). In the two cases studied, lead in suspension with an initial concentration of 50 mg L-1 was removed by 99.99% in 2 hours. However, the presence of the biofilm of P. aeuruginosa accelerated the removal process, obtaining about 90% of the initial amount adsorbed in the EPS and fibers during the first hour of the treatment. The highest removal rate of lead in suspension was obtained when the ratio resulting from dividing the amount of fiber (expressed in grams) between the volume of the container (expressed in mL) is approximately equal to 0.15. The uses of natural fibers (P. andina) together with biofilms of P. aeuroginosaare an efficient, simple and economical alternative …

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