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Chinese Journal of Applied Ecology ›› 2001, Vol. ›› Issue (3): 447-450.

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Co-metabolic degradation of pyrene in soil

GONG Zongqiang, LI Peijun, WANG Xin, ZHANG Hairong, SONG Yufang, LI Bin   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016;
    2. Department of Architecture and Environment, Shenyang University, Shenyang 110044
  • Received:2001-06-01 Revised:2000-09-29 Online:2001-05-25

Abstract: High molecular weight Polycyclic Aromatic Hydrocarbons (PAHs) are always degraded by means of co metabolism.This study compared the degradation process of pyrene as sole source of carbon and energy and co metabolic degradation process of pyrene.The degradation rate of pyrene after 25 days in the first process was 57%,while the degradation rate of pyrene in the co metabolic processes were about 80%.The half life of pyrene in the co metabolic process was shorter than those in the processes without co metabolism.Salicylic acid,phthalic acid,sodium succinate could serve as co metabolic substrate to enhance the degradation rate of pyrene,and sodium succinate has the best effect.There was co metabolic relationship between pyrene and phenanthrene which was a kind of low molecular weight PAHs,phenanthrene accelerated the degradation of pyrene,while naphthalene didn’t.The principle of the co metabolism and the optimal material used as co metabolic substrate were demonstrated in this paper.

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