石油污染土壤中菲、蒽和正十六烷的微生物降解  

Biodegradation of phenanthrene,anthracene and n-hexadecane in petroleum-contaminated soil.

作　　者：赵晓秀[1] 赵慧敏[1] 全燮[1] 陈硕[1] 赵雅芝[1] 

机构地区：[1]大连理工大学环境与生命学院工业生态与环境工程教育部重点实验室,辽宁大连116023

出　　处：《生态学杂志》2009年第3期456-460,共5页Chinese Journal of Ecology

基　　金：国家重点基础研究发展计划资助项目(2004CB418504)

摘　　要：在模拟自然条件下,考察了芳香烃(菲、蒽)和脂肪烃(正十六烷)单独存在以及共存于土壤中时,土著微生物对它们降解的影响。结果表明,土著微生物对它们的降解均符合一级反应动力学。菲、蒽或正十六烷单独存在于土壤中时,其微生物降解速率常数分别为0.0226、0.0283和0.0096d-1。菲和正十六烷共存时,正十六烷能够作为土著微生物降解菲的共代谢底物,促进菲的降解,使菲的半衰期比其单独存在于土壤中缩短44%;同时,正十六烷的加氧酶被菲诱导,使其活性提高而增强对正十六烷的降解作用,其微生物降解半衰期比其单独存在于土壤中缩短49%。菲和蒽共存促进了土著微生物对菲的降解,却抑制了对蒽的降解。A simulation test was conducted to study the biodegradation of aromatic hydrocarbons （ phenanthrene and anthracene） and aliphatic hydrocarbon （n-hexadecane） by indigenous microorganisms when the test hydrocarbons were existed individually or in coexistence in soil. The results indicated that the biodegradation of test hydrocarbons followed first-order kinetics. The hiodegradation rate constant of phenanthrene, anthracene, and n-hexadecane existed individually in soil was 0. 0283,0. 0226 and 0. 0096 d^-1 , respectively. When co-existed with phenanthrene, nhexadecane could serve as a co-metabolic substrate and promote the biodegradation of phenanthrene, making the half life of phenanthrene reduced by 44% , comparing with that when phenanthrene existed individually. In the meanwhile, n-hexadecane oxygenase was induced by phenanthrene. The increase of the induced oxygenase activity promoted the degradation of n-hexadecane, and reduced the half life of n-hexadecane by 49% , comparing with that when n-hexadecane existed individually. Contrarily, the coexistence of phenanthrene and anthracene promoted the biodegradation of phenanthrene but inhibited that of anthracene.

关 键 词：菲 蒽 正十六烷 共代谢 土壤 

分 类 号：X53[环境科学与工程—环境工程]