پاك سازي بيولوژيكي خاك آلوده به نيتروفنول در فاز دوغابي با روش افزايش زيستي

Slurry-Phase Biological Treatment Of Nitrophenol Contaminated Soil Using Bioaugmentation Technique

P-nitrophenol (PNP), a nitroaromatic hydrocarbon, can be discharged in soil matrices during the production, distribution, and application of pesticides, insecticides and drugs. Therefore, rapid removal and detoxification of this compound is necessary. In this study, PNP biodegradation was investigated by using a microorganism which was selected among a microbial collection. Among the seven microorganisms examined in aqueous phase, Alcaligenes faecalise showed the maximum tolerance threshold against PNP toxicity and PNP biodegradation. Afterward, in order to investigate PNP biodegradation in contaminated soils, experiments were carried out in slurry phase for 21 days. Results at two initial PNP concentrations of 25 and 50(mgkg-l) showed 75 and 50% decrease in PNP amount in soil slurry, respectively. Our results indicate that A. feacalise has potential for use in in situ bioremediation of PNP-contaminated sites.