球红假单胞菌对活性炭的降解转化  

Bio-degradation of Activated Carbon by Rhodopseudomonas spheroides

作　　者：刘倩[1] 杨洪英[1] 佟琳琳[1] 乔丽丽[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2015年第5期670-674,共5页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2012AA061501);国家自然科学基金资助项目(51174062;51374066;51304047);中央高校基本科研业务费专项资金资助项目(N120602006;N110302002;N110602005)

摘　　要：以活性炭作为含碳金矿中碳质物的替代物,研究了球红假单胞菌对其的降解转化及吸金能力的影响.通过正交试验确定了球红假单胞菌降解活性炭的最优工艺组合:粒度<74μm、炭浆质量分数5%、降解时间14 d、菌液用量1 m L/100 m L,此时活性炭的降解率高达28.35%.金吸附性试验表明,球红假单胞菌可使活性炭的吸金能力降低11.46%.球红假单胞菌使活性炭的微晶结构发生变化;一些芳环结构被破坏;含氧基团和芳香族结构的数量增多.这说明球红假单胞菌在降低碳质物劫金性方面是一种有效微生物.The effect of Rhodopseudomonas spheroides on the degradation and the gold adsorption capacity of activated carbon were investigated, and activated carbon was used as a substitute of carbonaceous materials in carbonaceous gold ores. The optimum process conditions of bio- degradation of activated carbon were confirmed by orthogonal experiment, i.e. the granularity was 〈 74 μm, the pulp mass concentration was 5% , the degradation time was 14 d and the microbial quantity was 1 mL/100mL. Under the optimum process conditions, the bio-degradation rate of activated carbon reached to 28.35%. The gold-adsorption tests showed that Rhodopseudomonas spheroides decreased the gold-adsorption capacity of activated carbon, about 11.46%. The micro-crystalline structure of activated carbon and some of the aromatic ring structures were distorted, and the content of oxygen-containing groups and aromatics was increased. These indicated that Rhodopseudomonas spheroides is an available bacterium, which can be employed to reduce the preg-robbing capacity of carbonaceous matter.

关 键 词：球红假单胞菌 含碳金矿 活性炭 生物降解 吸金能力 

分 类 号：TF18[冶金工程—冶金物理化学]