藻类对壬基酚微生物降解的影响

The effect of algae on biodegradation of nonylphenol by microorganism

壬基酚(NP)为在水环境中广泛存在的一种典型环境内分泌干扰物质。为了探讨NP在自然水体中的归趋,研究了水体中藻类对微生物降解NP的影响。结果表明,本研究筛选的耗氧混合菌可以有效降解NP,在暗环境下半衰期为1.16d,光照不利于NP的微生物降解,半衰期增加到5.19d;藻类和藻胞外分泌物可以提高光照条件下NP的微生物降解,这是藻类和菌加和作用的结果;而破碎的藻对降解作用改善不大。藻类和微生物相互作用对于有机污染物降解的影响还鲜见报道,本研究为全面理解NP在水环境中的归驱提供了重要的数据。

Nonylphenol （NP） is a classic environmental endocrine disruptor, which extensively exists in aquatic environments. In order to elucidate the fate of NP in aquatic environments, the effect of algae on biodegradation of NP by microorganism in water was studied. The results showed that the domesticated mix aerobic bacteria could degrade NP efficiently in the dark with t1/2 of 1.16 d. Introduction of light retarded the biodegradation of NP with t1/2 being prolonged to 5.19 d. Algae and algae-filtrate could improve the biodegradation of NP by the mix bacteria under the light because of the joint effect between algae and bacteria. But the broken algae didn＇t improve the biodegradation of NP. The mutual effects of algae and microorganisms in degradation of organic pollutants have been seldom reported, and hence, this study provides important data for complete understanding of the fate of NP in the aquatic environment.