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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (5): 140-144.doi: 10.11872/j.issn.1005-2518.2017.05.140

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Screening of High Correlation Variables of Elemental Carbon Degradation by Phanerochaete chrysosporium in Carbonaceous Gold Ores

LIU Qian1，YANG Hongying2，TONG Linlin2   

  1. 1.Shanghai Collaborative Innovation Centre for WEEE Recycling，Shanghai Polytechnic University，Shanghai    201209，China；
    2.School of Metallurgy，Northeastern University，Shenyang    110819，Liaoning，China
  • Received:2017-07-11 Revised:2017-08-18 Online:2017-10-30 Published:2018-02-12

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Abstract:

The high correlation variables of the elemental carbon degradation with P.chrysosporium were selected in carbonaceous gold ores by Plackett-Burman design method.Eight variables of fungal degradation of carbonaceous matter were confirmed by the previous single factor experiments，which were the guaiacol concentration，the dextrin concentration，the tween-80 concentration，the oxalic acid concentration，the hydrogen peroxide concentration，the pulp density，the fungal concentration and the reaction time.The high correlation variables influencing the fungal degradation of elemental carbon，as identified by a two-level Plackett-Burman design method，were the guaiacol concentration，the oxalic acid concentration and the pulp density.Guaiacol is a kind of inducer.The low concentration of guaiacol could promote the degradation of elemental carbon by improving the enzyme activity and inducing the production of enzymes.The high concentration of guaiacol was not conducive to the fungal degradation of elemental carbon because the generation of enzymes and the enzyme activity were inhibited.Oxalic acid could affect the fungal growth and the enzymes activity by adjusting pH value of the degradation system.The pulp density could influence the effective contact area between elemental carbon and fungi，the shear stress and the mass transfer efficiency of degradation system.

Key words: P.chrysosporium, elemental carbon, high correlation variables, Plackett-Burman design method, screening, carbonaceous gold ores

CLC Number: 

  • TF831
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