一株菲高效降解菌的环境适应性研究

生物降解是多环芳烃从环境中去除的主要途径,菲是一种典型的三环芳烃。本研究考察了一株能高效降解多环芳烃菲的鞘氨醇单胞菌GY2B在含河沙环境及不同盐度的人工海水环境中的生长特性与降解菲的情况。结果表明：河沙的加入对菌株GY2B的生长及其高效降解菲的性能均无明显影响,65 h可将起始浓度为100 mg/L的菲降解99.5%以上;而经过驯化后在添加85%人工海水的条件下该菌也仍可正常生长并高效降解菲,66 h可将起始浓度为100 mg/L的菲几乎完全降解。本研究结果可为菌株GY2B在受多环芳烃污染的河滩、河口及近海海洋环境修复中的应用提供参考依据。

Environmental Adaptability Study on a Phenanthrene-Degrading Strain

Biodegradation has been suggested as the best way to remove polyeyclic aromatic hydrocarbons （PAHs） from contaminated environment. Phenanthrene is one of typical three - ring PAHs. This work had examined the growth of a phenanthrene - degrading strain Sphingomonas sp. GY2B and its degradation efficiency on phenanthrene in the effect of sand and differenct salinity of artificial seawater. The results showed that the addition of sand and determinate concentration of artificial seawater didn＇t obviously affect the growth of strain and the degradation rate of phenanthrene. Phenanthrene with initial concentration of 100 mg/ L was almost completely degraded after 66h. So the strain Sphingomonas sp. GY2B could be applied in the remcdiation of tideland, estuary and offshore sea contaminated by PAHs.