Molecular approach to evaluate biostimulation of 1,2-dibromoethane in contaminated groundwater

► This study investigated the potential for biostimulation of 1,2-dibromoethane in contaminated groundwater using a molecular approach. ► Microcosm experiments diligently mimicked in situ conditions. ► The addition of jet fuel (50 mg/l) yielded the highest biodegradation of EDB. ► Jet fuel addition led to highest bacterial numbers compared with other amendments. ► Members of genera associated with monooxygenase dominated all microcosms. ► Gene abundances for monoxygenase were significantly higher in jet fuel treatments.