Degradation half-life decreased 5-fold after a reduction of 1,1,2-TCA concentration.
Isotopic enrichment factor changed from − 14.6 ± 0.7‰ to − 0.72 ± 0.12‰.
Degradation mechanism changed from abiotic reductive degradation to biodegradation.
Co-culture of Desulfitobacterium and Dehalococcoides responsible for biodegradation