[Co-metabolic degradation of pyrene in soil].
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.
Gong
Z
Z
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016. gong-zq@yahoo.com
Li
P
P
Wang
X
X
Zhang
H
H
Song
Y
Y
Li
B
B
D004787:Environmental Pollution; D006207:Half-Life; D010795:Phthalic Acids / Q000378:metabolism; D011721:Pyrenes / Q000378:metabolism*; D020156:Salicylic Acid / Q000378:metabolism; D012987:Soil; D012988:Soil Microbiology; D013997:Time Factors
D010795:Phthalic Acids; D011721:Pyrenes; D012987:Soil; C032279:phthalic acid; D020156:Salicylic Acid