六株真菌对土壤中芘和苯并芘的降解及其动力学

Degradation of pyrene and benzo[a]pyrene in soil by six strains of fungi and its kinetics

研究了6株真菌对土壤中芘和苯并芘(BaP)的降解动态,用Michaelis-Menton和Monod动力学模型对结果进行拟合.结果表明,6株真菌对芘和BaP的降解速率有显著性差异,降解率相差不大.产黄青霉(Penicillium chrysogenum,SF04),在42d内对BaP的降解能力最强,可达71.31%,对芘的降解能力相对最弱.镰刀菌(Fusariumsp.,SF11),黑曲霉(Aspergillusniger,SF05),木霉(Trichodermasp.,SF02)和毛霉(Mucorsp.,SF06)42d对芘的降解率分别为86.22%,86.18%,85.41%,85.04%,对BaP的降解率分别为71.11%,69.44%,69.05%,69.72%.木霉(Trichodermasp.,SF02)和毛霉(Mucorsp.,SF06)对芘和BaP的降解速率均很快.

Degradative kinetics of pyrene and benzo[a]pyrene （BaP） in soil by six individual strains of fungi were examined using the Michaelis-Menton and Monod dynamic models. There were significant differences occurred in the degradation rates of pyrene and BaP by the six individual strains, however, their final degradation was approaching each other. Penicillium chrysogenum SF04 had the highest degradation of BaP, up to 71.31%, and had the lowest degradation of pyrene in 42 days. The degradation rates of pyrene by Fusarium sp. SF11, Aspergillus niger SF05, Trichoderma sp. SF02, Mucor sp. SF06 in 42 days were 86.22%, 86.18%, 85.41%, 85.04%; and the degradation rates of BaP by Fusarium sp. SF 11, Aspergillus niger SF05, Trichoderma sp. SF02, Mucor sp. SF06 in 42 days were 71.11%, 69.44%, 69.05%, 69.72%, respectively. There was the most rapid degradation of pyrene and BaP by Trichoderma sp. SF02 and Mucor sp. SF06.