Endosulfan is an organochlorine pesticide included in the Stockholm Convention for Persistent Organic Compounds. The utilization of endosulfan as the sole source of carbon and its mineralization was evaluated using pure strains of Bacillus subtilis, Bacillus pseudomycoides, Peribacillus simplex, Enterobacter cloacae, Achromobacter spanius, and Pseudomonas putida, isolated from soil with historical pesticide use. The consumption of the α isomer of endosulfan by five of the six strains studied was higher than 95%, while B. subtilis degraded only 76% of the initial concentration (14 mg/L). On the other hand, the degradation of the β isomer was approximately 86% of the initial concentration (6 mg/L) by B. subtilis, P. simplex, and B. pseudomycoides and 95% by P. putida, E. cloacae, and A. spanius. The ability of A. spanius, P. simplex, and B. pseudomycoides to degrade endosulfan has not been previously reported. The production of endosulfan lactone by the Bacillus strains, as well as A. spanius and P. putida, indicated that endosulfan was degraded by the hydrolytic pathway.

Depto de Alimentos y Biotecnología Facultad de Química Universidad Nacional Autónoma de México Mexico City Mexico

Depto de Ingeniería Agrícola y uso de la tierra Facultad de Agronomía Universidad de Buenos Aires Buenos Aires Argentine

Depto de Procesos y Tecnología Universidad Autónoma Metropolitana Cuajimalpa Av Vasco de Quiroga 4871 Col Santa Fe C P 05348 México City Mexico

Licenciatura en Ingeniería Biológica Universidad Autónoma Metropolitana Cuajimalpa Mexico City Mexico

Citace poskytuje Crossref.org