Removal of two organophosphate pesticides by a bacterial consortium immobilized in alginate or tezontle.
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.
Yañez-Ocampo
Gustavo
G
Laboratorio de Investigaciones Ambientales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, avenida universidad 1001, colonia Chamilpa Cuernavaca, Morelos, CP 62209, Mexico.
Sanchez-Salinas
Enrique
E
Jimenez-Tobon
Gloria Alicia
GA
Penninckx
Michel
M
Ortiz-Hernández
María Laura
ML
D000464:Alginates; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D008855:Microscopy, Electron, Scanning; D009943:Organophosphorus Compounds / Q000302:isolation & purification* / Q000378:metabolism; D010575:Pesticides / Q000302:isolation & purification* / Q000378:metabolism
D000464:Alginates; D006603:Hexuronic Acids; D009943:Organophosphorus Compounds; D010575:Pesticides; D020723:Glucuronic Acid