مقايسه توانايي باكتري ها و قارچ ها در تيمار زيستي آب و خاك آلوده به 2،4، 6- تري نيتروتولوئن

Comparision Study On Bacterial And Fungal Bioremediation Of 2,4,6-Trinitrotoluene Contaminated Water And Soil

In recent years, considerable efforts have been invested in finding economical remediation technologies for man-made chemicals elimination from environment, among which biological treatment processes have attracted the attention of many researchers. Due to the toxic and mutagenic effects of nitroaromatic explosive, these energetic materials are recognized as a major environmental problem. Particularly, 2,4,6- trinitrotoluene, a widely exploited military and industrial explosive, had a great contribution in contamination of water and soil. In this research, for identifying the appropriate organisms among the 7 bacterial and fungal strains reported as effective in aromatic hydrocarbon biodegradation, trinitrotoluene biotransformation was firstly examined in aqueous phase at water solubility of trinitrotoluene (100(mg/l)). Pseudornonas putida, showing complete biotransformation of trinitrotoluene, was selected as a superior organism under aerobic condition. Afterwards, bioremediation of a trinitrotoluene contaminated soil (1000(mg/kg)) in slurry phase was performed using Pseudornonas putida where 97% trinitrotoluene biotransformation was achieved whitin 25 days.