Degradation characteristics of single and mixed PAHs by Polyporellus picipes

Polyporellus picipes,which existed commonly in forest area of northeast China,was used to degrade single and mixed polycyclic aromatic hydrocarbons(PAHs).The accumulated degradations of phenanthrene,anthracene and pyrene were measured in 11,22and 33d respectively.The degradation of single PAHs were phenanthrene anthracene pyrene,and the accumulated degradation efficiencies of 33days were 96.56%,94.76% and 57.53%,respectively.The accumulated degradation efficiencies of phenanthrene and pyrene in the presence of anthracene were 99.46% and 61.09%.In mixed PAHs degradation,adding a bit of anthracene would stimulate Polyporellus picipes to degrade phenanthrene and pyrene,and make the degradation efficiencies of them raise 2.9% and 3.56%.In conclusion,to improve the degradation of high molecular weight(HMW) or refractory PAHs,the low molecular weight(LMW) PAHs could be used as the co-metabolism substrates for HMW PAHs degradation.