五价钒的生物还原过程特征研究  

Study on the bio-deoxidization process of pentavalent vanadium

作　　者：肖春艳[1] 李少华[2] 李浩然[2] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454003 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100080

出　　处：《河南理工大学学报（自然科学版）》2008年第2期244-249,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(20476009)

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.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.

关 键 词：偏钒酸钒 葡萄糖 还原率 菌质量浓度 5价钒 

分 类 号：Q493.4[生物学—生理学]