Potential application of native microorganism from Córdoba in bioremediation.

ONTAÑON, OM., ; AMBROSIO LF, ; PAISIO CE, ; AGOSTINI E, ; GONZÁLEZ PS.

San Juan

Congreso; ?. Congreso Conjunto de Sociedades de Biología de Argentina.; 2011

SBC

Bioremediation is an important process to reduce or remove organic and inorganic pollutants from the environment. Chromium and phenolic compounds are examples of these hazardous pollutants. In the present work, we analyzed the capability of the rhizospheric microorganism RTS 13 A.3, a Gram negative bacteria isolated from a polluted industrial area near Rio Tercero, to tolerate and remove high concentrations of chromium (VI), phenol and 2,4-dichlorophenol (2,4-DCP), with the aim to evaluate the potential of this microorganism for bioremediation processes. RTS 13 A. 3 was able to grow up to 300 mg/l Cr (VI), 1000 mg/l phenol and 100 mg/l 2,4-DCP in TY medium, while in mineral medium, MM9, the microorganism tolerated smaller concentrations. In the removal assays, a total Cr (VI) reduction was observed in TY medium when the concentrations were 5, 10 and 20 mg/l after 1, 3 and 7 days of incubation, respectively. In addition, a 75 % of removal was observed in a solution initially containing 50 mg/l after 7 days. In the same period of time, a decrease in the chromium removal was observed in MM9 medium supplemented with glucose 1 mg/l. Regarding to phenolic compounds removal, the microorganism was able to remove 100 mg/l of phenol and 20 mg/l of 2,4-DCP in MM9 medium after 14 days. These results could indicate the potential of RTS 13 A for future applications in bioremediation of environmental pollutants.