چاپ صفحه |  صفحه نخست سامانه |  چکیده مقاله |  نویسندگان |  دانلود مقاله | دانشگاه علوم پزشکی تبریز |
| Abstract: Environmental bacteria have an important role in the removal and improvement of metals from polluted area. Metal–microbe interactions as a form of detoxification of metal have been developed. In this study, we investigated the ability of Tabrizicola aquatica RCRI19T, a novel environmental bacterium isolated from deepwater from Qurugöl Lake nearby Tabriz city, Iran, to Fe(III)-reduction as an electron acceptor in minimal essential elements condition. Subsequently, bioabsorption behaviour of heavy metals (Ni2+, Co2+, pb2+) by strain RCRI19T has been demonstrated. Our results showed that strain RCRI19T can reduce 20mM ferric-citrate particularly in anaerobic condition, and a positive correlation was observed between bacterial growth and iron (II) production. Owing to its iron reduction rate, T. aquatica RCRI19T may contribute to iron mineral transformation and element cycling in deepwater of the lake. We further observed that the dead biomass of strain RCRI19T absorbs of heavy metals (Ni2+, Co2+ and Pb2+) from aqueous solution. The optimum conditions of biosorption are in pH = 4 for Ni2+, Pb2+ and pH = 5 for Co2+. The equilibrium experimental data fitted both of Freundlich and Langmuir isotherms and displayed monolayer adsorption. Two kinetic models, namely pseudo-first-order and pseudo-second-order were used to describe the kinetics of heavy metal ion biosorption on T. aquatica. Pseudo second order was the best of the other kinetic. |
| نویسنده | نفر چندم مقاله |
|---|---|
| وحیده طرح ریز | اول |
| زهرا اکبری | دوم |
| آزیتا دیلمقانی | سوم |
| محمد سعید حجازی | پنجم |
| نام فایل | تاریخ درج فایل | اندازه فایل | دانلود |
|---|---|---|---|
| aeticle.pdf | 1398/04/19 | 793325 | دانلود |
