Study on the bio-deoxidization process of pentavalent vanadium

Abstract：In view of toxicity of pentavalent vanadium is highest in the vanadium compounds which create to the environment, the deoxidizing process of V (Ⅴ) by bacteria was thoroughly studied.Use V (Ⅴ) as the final electron acceptor, glucose as organic substrat and C.N bacteria to deoxidize pentavalent vanadium, the microbe-catalyzed bio-deoxidization process of sodium vanadium was discussed.The results of the experiment indicated that the bacteria grew well with the presence of sodium vanadium.The highest concentration of bacteria was 39.11μg/mL when the concentration of sodium vanadium was 4mmol/L.The prime deoxidization efficiency of vanadium reached 75.35% when the concentration of sodium vanadium was 5mmol/L.Along with the increasing of the concentration of pentavalent vanadium, vanadium would restrain the growth of bacteria, thus cause a dropping in the deoxidization efficiency of pentavalent vanadium.

Keyword：vanadium;glucose;deoxidization efficiency;concentration of bacteria;pentavalent vanadium;