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… 

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.

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.

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.

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.

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.

Desorption of nitramine and nitroaromatic explosive residues from soils detonated under controlled conditions

It is suggested that explosive compounds loaded to soils through detonation take longer to reach equilibrium concentrations in aqueous batches than soils loaded with explosive residues through aqueously addition.

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 development