DOI: 10.1101/503896Dec 21, 2018Paper

A Novel Uranium Bioremediation Approach using Radioresistance Deinocoocus radiodurans Biofilm

BioRxiv : the Preprint Server for Biology
T ManobalaM Dharmedira Kumar


Deinococcus radiodurans, the most radiation resistant organism ever known, has gained importance in recent years as a potential candidate for bioremediation of heavy metals, especially radioactive ones. This study investigates the efficiency of a recombinant D. radiodurans (DR1-bf+) strain with an ability to form biofilm for uranium remediation. In this study, a modified Arsenazo III dye method was used to estimate the uranium concentration. Uranyl nitrate aqueous solution, wherein U exists as uranyl ion, is generated during the operation of nuclear fuel reprocessing. The D. radiodurans biofilm (DR1-bf+) grown in the presence of 20 mM Ca2+ ion showed a phenomenal ability of uranyl ion removal. DR1-bf+ (+Ca2+) biofilm removed ~75% of 1000 mg/L uranium within 30 minutes post treatment from uranyl nitrate aqueous solution. U removal rate was also found to be directly proportional to biofilm age. This study discusses the extraordinary ability of D. radiodurans biofilm in uranium removal.

Related Concepts

Uranyl Nitrate
Microbial Biofilms
DR1 protein, human
Metals, Heavy
Deinococcus radiodurans
Biofilm Formation

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