球红假单胞菌对活性炭的降解转化

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.

Bio-degradation of Activated Carbon by Rhodopseudomonas spheroides

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 <74μm， the pulp mass concentration was 5%， the degradation time was 14d and the microbial quantity was 1mL/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.