锰离子浓度对氧化亚铁硫杆菌生长动力学的影响  

Effect of manganese ion concentration on growth kinetics of Acidithiobacillus ferrooxidans

作　　者：滕青[1,2] 冯雅丽[1] 李浩然[2] 张旭[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100190

出　　处：《中国有色金属学报》2016年第7期1547-1551,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(21176026;21176242);中国大洋矿产资源研究开发计划(DY125-25-T-08);中央高校基础研究基金资助项目(FRT-TP-09-002B)~~

摘　　要：考察不同初始ρ(Mn^(2+))条件下,氧化亚铁硫杆菌(A.ferrooxidans)培养体系中Fe^(2+)浓度的变化曲线和A.ferrooxidans菌的生长活性。结果表明:A.ferrooxidans菌对Mn^(2+)具有一定的耐受能力;当培养基中ρ(Mn^(2+))≤1 g/L时,Mn^(2+)对A.ferrooxidans菌生长活性影响很小;ρ(Mn^(2+))为5~15 g/L时,A.ferrooxidans菌生长开始受到抑制;ρ(Mn^(2+))=20 g/L时,A.ferrooxidans菌生长完全受到抑制。为了进一步描述Mn^(2+)对其生长活性的影响,利用[Fe^(2+)]/[Fe^(3+)]的比值及A.ferrooxidans菌对Fe^(2+)的得率系数对不同Mn^(2+)浓度下细菌的比生长速率进行拟合,较好地描述Mn^(2+)浓度对氧化亚铁硫杆菌生长的影响。Acidithiobacillus ferrooxidans（A.ferroxidans） can be used for microbial leaching of manganese oxide, the impact of the different initial Mn2＋ concentration on the activity of the growth of A.ferrooxidans was studied, and the bacterial growth and activity were obtained at different manganese ion concentrations. The results show that A.ferrooxidans is tolerant to Mn2＋ some extent. The effect of Mn2＋ on the growth and activity of A.ferrooxidans by Mn2＋is not bad when A.ferrooxidans are cultured in medium containing ρ（Mn^（2＋））≤1 g/L. The growth and activity of A.ferrooxidans are obviously influenced by Mn2＋ when ρ（Mn2＋） is 5-15 g/L. When the concentration of Mn2＋ is around 20 g/L, the growth and activity of A.ferrooxidans are completely inhibited. In orden to further describe the impact of Mn2＋ on growth activity of A.ferrooxidans, [Fe2＋]/[Fe3＋] and the yield coefficient of Fe2＋ on the specific growth rate of A.ferrooxidans in different concentrations of Mn2＋ were fitted, the effect of Mn2＋ concentration on the growth of A.ferrooxidans was described better.

关 键 词：氧化亚铁硫杆菌 生物浸锰 生长动力学 比生长速率 

分 类 号：Q935[生物学—微生物学]