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Removal of two organophosphate pesticides by a bacterial consortium immobilized in alginate or tezontle.

par Yañez-Ocampo, Gustavo;Sanchez-Salinas, Enrique;Jimenez-Tobon, Gloria ;Penninckx, Michel ;Ortiz-Hernández, María Laura
Référence Journal of hazardous materials, 168, 2-3, page (1554-1561)
Publication Publié, 2009-09

Article révisé par les pairs

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Résumé :

In order to remove methyl-parathion (MP) and tetrachlorvinphos (TCF), a bacterial consortium was immobilized with two supports consisting of alginate beads or stones of tezontle colonized by biofilm. Removal kinetics were recorded for suspended and immobilized consortium using a mineral salt medium supplemented with MP and TCF at 25mg/L and with 0.1% (w/v) glucose as a co-substrate. The viability of the consortium cultivated in suspension was maintained for 6 days, whereas the viability of the consortium immobilized in alginate and tezontle supports was maintained for up to 11 and 13 days, respectively. Growth was enhanced when using glucose as a co-substrate. The percentage of MP removed was significantly higher (alpha=0.05) when consortium was immobilized in alginate beads and biofilm on tezontle as compared to suspension culture.