BIOREMEDIATION STRATEGIES FOR PESTICIDE-CONTAMINATED SOIL: II. EVALUATION OF BIOAUGMENTATION UTILIZING A SELECTED MICROBIAL CONSORTIUM

摘要

A selected microbial consortium (SMC) capable of degrading two specific herbicides, alachlor (2-chloro-2’, 6’-diethyl-N-[methoxymethyl]-acetanilide; AL) and atrazine (2-chloro-4-ethylamino-6-isopropylamino-S-triazine; AT) was isolated from a pesticide-contaminated mix-load site soil. Evaluation of bioaugmentation as a feasible bioremediation strategy for this mix-load site soil was initiated using standard laboratory biometer flasks. Forty-eight percent of AT and 70% of AL was degraded in the inoculated biometers. Alachlor concentration decreased at a slower rate than AT and appeared to be dependent upon AT degradation. Complete disappearance of the herbicides was not achieved. The presence of 2 AL metabolites and several AT metabolites in the treated soil elucidate the possible transformation pathway of biodegradation.