【摘要】 为分析壬基酚在环境中的积累行为,基于间歇活性污泥实验和质谱解析方法,结合环境水体中NP检测分析,研究了污水生物处理过程中壬基酚同分异构体的生物降解差异与壬基分支结构的相关性。结果表明,生物处理出水和活性污泥中有3种壬基酚异构体残留量显著高于其他异构体,生物降解性较差;壬基酚异构体的生物降解性与其壬基取代基的链长、支链大小和数目具有相关性。由于壬基取代基的分支程度差异,活性污泥对壬基酚不同异构体的降解具有选择性,壬基取代基的支链长、数量多时不利于生物降解,容易在环境中积累。更多还原

【Abstract】 The relativity between biodegradability and nonyl branches structure for the isomers of nonylphenol(NP) is studied by the sequencing batch activated sludge process for NP accumulating behavior analyses in water environment.The results show that the residual content of three NP isomers is markedly higher than that of other isomers in the effluent and activated sludge.The three kinds of isomers have relatively low biodegradability.The biodegradability of NP isomers depends on the chain length,the size and number of branches in nonyl.Because of difference in the branches of nonyl,the biodegradation of NP through activated sludge process is associated with selectivity for different kinds of isomers.The NP isomers whose structure is of longer branch chain or more branches in nonyl are harder to biodegrade,so they may accumulate in the environment.更多还原