Biodegradation of phenanthrene and pyrene in compost-amended soil.
This study investigated the biodegradation of the polycyclic aromatic hydrocarbons (PAHs) phenanthrene and pyrene in compost and compost-amended soil. The degradation rates of the two PAHs were phenanthrene>pyrene. The degradation of PAH was enhanced when the two PAHs were present simultaneously in the soil. The addition of either of the two types of compost (straw and animal manure) individually enhanced PAH degradation. Compost samples were separated into fractions with various particle size ranges, which spanned 2-50 microm, 50-105 microm, 105-500 microm, and 500-2000 microm. We observed that the compost fractions with smaller particle sizes demonstrated higher PAH degradation rates. However, when the different compost fractions were added to soil, compost particle size had no significant effect on the rate of PAH degradation. Of the micro-organisms isolated from the soil-compost mixtures, strains S1, S2, and S8, which were identified as Arthrobacter nicotianae, Pseudomonas fluorescens, and Bordetella Petrii, respectively, demonstrated the best degradation ability.
Department of Microbiology, Soochow University, Taipei, Taiwan.
Shaw Y
SY
Yuan
Lai M
LM
Su
Bea V
BV
Chang
D002851:Chromatography, High Pressure Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D008855:Microscopy, Electron, Scanning; D010616:Phenanthrenes / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D011721:Pyrenes / Q000378:metabolism*; D012987:Soil; D012988:Soil Microbiology; D013050:Spectrometry, Fluorescence
D010616:Phenanthrenes; D011721:Pyrenes; D012987:Soil; C031181:phenanthrene; C030984:pyrene