中文摘要：

针对钒化合物随价态升高其毒性也升高对环境造成的危害,深入研究了高价钒化合物的生物还原过程.以NaVO3做电子受体,葡萄糖做底物,利用C.N菌对5价钒还原过程,探讨了微生物还原5价钒的最佳条件,考察了C.N菌生长过程中对5价钒的还原率,葡萄糖的消耗程度以及pH值的变化.实验结果表明,当溶液中NaVO3浓度为4 mmol/L时,该菌在溶液中的生长较好,菌质量浓度最大达39.11μg/mL;NaVO3浓度为5 mmol/L时,5价钒的还原率较高,达到75.35%,而NaVO3的浓度过大,则抑制微生物的生长,5价钒的还原率也降低.

英文摘要：

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 39.11 μg/mL when the concentration of sodium vanadium was 4 mmol/L. The prime deoxidization efficiency of vanadium reached 75.35% when the concentration of sodium vanadium was 5 mmol,/L. A- long 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.