Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (5): 670-674.DOI: 10.12068/j.issn.1005-3026.2015.05.014

• Materials & Metallurgy • Previous Articles     Next Articles

Bio-degradation of Activated Carbon by Rhodopseudomonas spheroides

LIU Qian, YANG Hong-ying, TONG Lin-lin, QIAO Li-li   

  1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2014-05-21 Revised:2014-05-21 Online:2015-05-15 Published:2014-11-07
  • Contact: YANG Hong-ying
  • About author:-
  • Supported by:
    -

Abstract: 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.

Key words: Rhodopseudomonas spheroides, carbonaceous gold ores, activated carbon, bio-degradation, gold-adsorption capacity

CLC Number: