嗜铁钩端螺旋菌氧化难处理金矿的研究  

Study on Oxidization of Refractory Gold Ore by Leptospirillum Ferriphilum LJ-02

作　　者：刘杰[1] 张旭[1] 朱明龙[1] 谭文松[1] 

机构地区：[1]华东理工大学生物反应器工程国家重点实验室,上海200237

出　　处：《有色金属（冶炼部分）》2015年第10期62-66,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家高技术研究发展计划(863计划)项目(2007AA060904;2012AA061503)

摘　　要：采用改良双层板方法从酸性矿坑水（AMD）中筛选、鉴定并命名为氧化效果最佳的分离株—嗜铁钩端螺旋菌（Leptospirillum ferriphilum）LJ-02。当温度在36~46℃范围内,矿石氧化率呈现出先升后降的趋势;降低pH对提高细菌氧化能力有着显著影响;在接种量不超过10%（v/v）的条件下,接种量的提高有利于矿石的生物氧化。该菌株对难处理金矿的吸附属于Langmuir等温吸附,其吸附平衡常数为8.72×10-10 mL/cells,单位质量矿物颗粒的最大吸收能力为1.99×109 cells/g。Iron-oxidation strains were isolated from AMD by improved double-layer plating cultural technique,among which one strain with highest oxidation ability was identified and named as Leptospirillum ferriphilum LJ-02.Ore oxidation ratio rises and then drops within 36--41 ℃.Drops of pH value have obvious influence on oxidizability of LJ-02.Ore oxidation ratio rises with inoculums amount of 10%（v/v）below.Adsorption of LJ-02 on refractory gold ore is Langmuir isotherm adsorption with adsorption equilibrium constant of 8.72 ×10-10 mL/cells and maximum absorption capacity of unit mass mineral grain of 1.99× 109 cells/g.

关 键 词：嗜铁钩端螺旋菌 双层平板培养法 难处理金矿 吸附特性 

分 类 号：TF831[冶金工程—有色金属冶金]