期刊
CHEMOSPHERE
卷 44, 期 5, 页码 1079-1086出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0045-6535(00)00475-6
关键词
pyrene; adsorption; desorption; intrinsic biodegradation rate; enhanced solubility; Mycobacterium; Pseudomonas aeruginosa; Pseudomonas fluorescens
To better understand complex bioavailability issues, pyrene degradation was examined in aqueous and soil slurry solutions using pure Mycobacterium sp. PYR-1 and a microbial consortium. The intrinsic rates of the aqueous pyrene degradation were very similar, 1.3 x 10(-9) mug pyrene/CFU-h for Mycobacterium sp. PYR-1 and 1.1 x 10(-9) mug pyrene/CFU-h for the consortium. Rates were much lower with the soil-slurry experiments, ranging from 1.2 x 10(-12) to 7.8 x 10(-10) mug/CFU-h, depicting the strong negative effects of soils on bioavailability. Supernatants from the slurry experiments were found to increase the aqueous-phase pyrene solubility significantly. Pyrene solubility was increased from 120.5 to over 230 mug/l. However, the linear adsorption constants of pyrene on the soil were reduced. (C) 2001 Elsevier Science Ltd. All rights reserved.
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