Co-metabolic degradation of pyrene in soil

Abstract

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.

CLC Number:

X172

GONG Zongqiang, LI Peijun, WANG Xin, ZHANG Hairong, SONG Yufang, LI Bin . Co-metabolic degradation of pyrene in soil[J]. Chinese Journal of Applied Ecology, 2001, (3): 447-450.

References

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