Su Dan, Li Pei-Jun, Wang Xin, Xu Hua-Xia
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Huan Jing Ke Xue. 2007 Apr;28(4):913-7.
Degradation kinetics of pyrene and benzo [a] pyrene (BaP) in soil by three individual strains of bacteria 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 three individual strains. When the initial concentrations of pyrene or BaP was 50 mg/kg in soil, the degradation rates of pyrene by Bacillus sp. SB02, Zoogloea sp.SB09, and Flavobacterium sp.SB10 in 42 days were 42.69%, 32.88% and 25.07% respectively for pyrene. Similarly, degradation rates of BaP by Bacillus sp. SB02, Zoogloea sp. SB09, and Flavobacterium sp. SB10 in 42 days were 33.04%, 25.39% and 22.02% respectively for BaP. In addition, there also were significant differences occurred in the degradation rates per day of pyrene and BaP by the three individual strains. The most rapid degradation of pyrene and BaP by Bacillus sp. SB02 occurred in one week, and 20.88% of pyrene and 12.6% of BaP were degraded. However, Zoogloea sp. SB09 had a slower degradation, while Flavobacterium sp. SB10 had the slowest degradation.
利用米氏动力学模型和莫诺德动力学模型，研究了三种单一菌株对土壤中芘和苯并[a]芘（BaP）的降解动力学。三种单一菌株对芘和BaP的降解速率存在显著差异。当土壤中芘或BaP的初始浓度为50 mg/kg时，芽孢杆菌属SB02、动胶菌属SB09和黄杆菌属SB10在42天内对芘的降解率分别为42.69%、32.88%和25.07%。同样，芽孢杆菌属SB02、动胶菌属SB09和黄杆菌属SB10在42天内对BaP的降解率分别为33.04%、25.39%和22.02%。此外，三种单一菌株对芘和BaP的每日降解率也存在显著差异。芽孢杆菌属SB02对芘和BaP的降解速度最快，在一周内，20.88%的芘和12.6%的BaP被降解。然而，动胶菌属SB09的降解速度较慢，而黄杆菌属SB10的降解速度最慢。
