Bioremediation of Explosive TNT by Trichoderma viride

Area of Science:

• Environmental Microbiology
• Bioremediation
• Chemical Engineering

Background:

• Nitroaromatic compounds like 2,4,6-trinitrotoluene (TNT) pose significant environmental and health risks due to their teratogenic and cytotoxic properties.
• Microbial-based bioremediation presents an advantageous approach to mitigate the toxicity of nitro-organic pollutants.
• Effective biological agents are needed to address soil and water contamination by explosives.

Purpose of the Study:

• To evaluate the degradation capability of the fungus *Trichoderma viride* on TNT.
• To analyze the biodegradation products of TNT using Gas Chromatography-Mass Spectrometry (GC-MS).
• To assess the potential of *T. viride* as a bioremediation agent for TNT.

Main Methods:

• Microbiological assay was employed to observe the growth of *Trichoderma viride* in the presence of TNT.
• TNT was supplied as a nitrogen source at concentrations of 50 and 100 ppm.
• Gas Chromatography-Mass Spectrometry (GC-MS) was utilized to identify TNT degradation products.

Main Results:

• *Trichoderma viride* demonstrated the ability to decompose TNT, utilizing it as a nitrogen source for growth.
• GC-MS analysis confirmed TNT biodegradation, evidenced by the disappearance of the initial TNT peak and the appearance of new peaks.
• Major biodegradation products identified were 5-(hydroxymethyl)-2-furancarboxaldehyde and 4-propyl benzaldehyde.

Conclusions:

• *Trichoderma viride* is a viable biological agent for the bioremediation of TNT-contaminated environments.
• The study confirms the potential of *T. viride* in eradicating the toxicity associated with TNT.
• Further molecular studies are recommended to identify specific enzymes and genes involved in TNT degradation by *T. viride*.