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研究黄孢原毛平革菌(Phanerochaete chrysosporium)对碳质金矿中碳质物的替代物——活性炭的降解转化及劫金能力的影响。经Phanerochaetechrysosporium作用14d后,活性炭的降解率高达27.59%。XRD和FTIR分析表明,Phanerochaete chrysosporium可使活性炭的微晶结构发生一定的畸变;含氧官能团和脂族结构的含量增多,一些芳烃结构氧化脱落。金吸附性试验表明,经Phanerochaete chrysosporium作用后,活性炭的吸金能力明显降低,可达12.88%。这说明Phanerochaete chrysosporium在降解转化活性炭类碳质物及降低其劫金能力方面是一种有效的微生物,可用于处理碳质金矿中碳质物,以降低其劫金性,提高金浸出率。探讨了Phanerochaete chrysosporium对碳质物的联合作用机理(钝化机理、碱作用机理和生物酶-自由基作用机理)。
To study the effects of Phanerochaete chrysosporium on the carbonaceous material substitutes in carbonaceous gold deposits - the degradation and transformation of activated carbon and the ability of robbing gold. After Phanerochaetechrysosporium for 14 days, the degradation rate of activated carbon was as high as 27.59%. The results of XRD and FTIR showed that Phanerochaete chrysosporium could distort the microcrystalline structure of activated carbon. The content of oxygen-containing functional groups and aliphatic structures increased and some aromatic structures oxidized and dropped off. Gold adsorption test showed that after the action of Phanerochaete chrysosporium, the absorption capacity of activated carbon decreased obviously, reaching 12.88%. This indicates that Phanerochaete chrysosporium is an effective microorganism in degrading carbonaceous materials and reducing their robbing ability, which can be used to treat carbonaceous materials in carbonaceous gold mines to reduce gold robbing and gold leaching rates. The mechanism of the combined action of Phanerochaete chrysosporium on carbonaceous matter was discussed (passivation mechanism, alkali action mechanism and biological enzyme - free radical mechanism).