Microbial degradation of explosives: biotransformation versus mineralization

  title={Microbial degradation of explosives: biotransformation versus mineralization},
  author={J. A.-A. Hawari and Sylvie Beaudet and Annamaria Halasz and Sonia Thiboutot and Guy Ampleman},
  journal={Applied Microbiology and Biotechnology},
Abstract The nitroaromatic explosive 2,4,6-trinitrotoluene (TNT) is a reactive molecule that biotransforms readily under both aerobic and anaerobic conditions to give aminodinitrotoluenes. The resulting amines biotransform to give several other products, including azo, azoxy, acetyl and phenolic derivatives, leaving the aromatic ring intact. Although some Meisenheimer complexes, initiated by hydride ion attack on the ring, can be formed during TNT biodegradation, little or no mineralization is… Expand
Transformation of 2,4,6-trinitrotoluene (TNT) by Raoultella terrigena
One isolate, Raoultella  terrigena strain HB, removed TNT at concentrations between 10 and 100 mg l−1 completely from culture supernatants under optimum aerobic conditions within several hours, and could be useful for the removal of TNT from contaminated waters. Expand
Anaerobic biotransformation of explosives in aquifer slurries amended with ethanol and propylene glycol.
Findings indicate the addition of ethanol and propylene to the aquifer slurries increased the hydrogen concentrations and enhanced the biotransformation of RDX and HMX in the explosive-contaminated soil. Expand
Bioremediation of Explosive TNT by Trichoderma viride
T. viride fungus was shown to have the ability to decompose, and TNT explosives were used at doses of 50 and 100 ppm on the respective growth media as a nitrogenous source needed for normal growth to confirm the biodegradable efficiency of TNT. Expand
TNT biotransformation: when chemistry confronts mineralization
While the possibility for TNT mineralization was rekindled with the discovery of TNT denitration and oxygenolytic and respiration-associated pathways, further characterization of responsible enzymes and their reaction mechanisms are required. Expand
Promising Strategies for the Mineralisation of 2,4,6-trinitrotoluene
Abstract2,4,6-trinitrotoluene (TNT) is known to be one of the most common military explosives. In spite of its established toxicity and mutagenicity for many organisms, soils and groundwater areExpand
Biodegradation of the cyclic nitramine explosives RDX, HMX, and CL-20
Recent developments on the biodegradation of cyclic nitramines and the potential of genomics to identify novel functional genes of explosive metabolism are reviewed. Expand
Stimulating the anaerobic biodegradation of explosives by the addition of hydrogen or electron donors that produce hydrogen.
It is suggested that the addition of H2 or electron donors that produce H2 may be a useful strategy for enhancing the anaerobic biodegradation of explosives in contaminated groundwater and soils. Expand
Microbial 2,4,6-trinitrotoluene degradation: could we learn from (bio)chemistry for bioremediation and vice versa?
The deciphering of the physiological roles of promiscuous enzymes involved in TNT biodegradation, such as type II hydride transferases of the Old Yellow Enzyme family, opens new perspectives for bioremediation. Expand
Aerobic Biodegradation of 2,4,6-Trinitrotoluene (TNT) by Bacillus cereus İsolated from Contaminated Soil
Results of this study propose which environmental pollutant can be removed by using microorganisms that are indigenous to the contaminated site by using Microbes isolated from North Atlantic Treaty Organization (NATO) TNT-contaminated soils. Expand
Biodegradation and Bioremediation of Explosives
Explosives are highly energetic chemicals that release large amounts of energy and gaseous products upon detonation in a short period of time. The history of explosives dates back to the developmentExpand