BIODEGRADATION OF LINDANE BY A NATIVE BACTERIAL CONSORTIUM ISOLATED FROM CONTAMINATED RIVER SEDIMENT

ELSEVIER SCI LTD

Año: 2004 p. 255 - 255

bstract The aerobic biodegradation of lindane (hexachlorocyclohexane) by a consortium of acclimated bacteria from sediment at a polluted site on the Suquia River, Cordoba, Argentina, is reported. The bacteria were acclimated for 30 days under aerobic conditions, using a minimal culture medium containing lindane (0:034 mM) as sole carbon source. Growth of the bacterial consortium decreased at a lindane concentration of 1:03 mM and was totally inhibited at 2:41 mM. The consortium showed initial lindane degradation rates of 4:92.10−3, 11:0.10−3 and 34:8.10−3 mM h−1 when exposed to lindane concentrations of 0.069, 0.137 and 0:412 mM, respectively. Chloride concentration increased during aerobic biodegradation, indicating lindane mineralization. A metabolite identified as -2,3,4,5,6-pentachlorocyclohexene appeared during the first 24 h of biodegradation. Four diferent bacteria, identifed as Sphingobacterium spiritivorum, Ochrobactrum anthropi, Bosea thiooxida