摘要
利用测定微生物呼吸耗氧量的方法，对氯苯类中的５种优先污染物：氯苯，邻、间、对－二氯苯，１，２，４－三氯苯的生物降解性能进行测试，比较了它们用不同的驯化污泥试验的生物降解性能差异。结果表明，五种氯苯在各自驯化污泥作用下的降解性易难顺序为：氯苯＞邻二氯苯＞间二氯苯＞对二氯苯＞１，２，４－三氯苯，对于氯苯、邻二氯苯、间二氯苯分别驯化污泥，它们能彼此降解，但不能降解对二氯苯和１，２，４－三氯苯，对于对二氯苯和１，２，４－三氯苯分别驯化污泥，对５种受试有机物都能产生降解作用，且能提高它们的生物降解速率。分析表明，５种受试物诱导产生了两种不同类型的酶系统，共代谢作用在它们的生物降解过程中发挥了重要作用。
A study on the biodegradability of five priority pollutants,including chlorobenzene,o 、m and p dichlorobene and 1,2,4 trichlorobenzene,was conducted by measuring the respiratory oxygen consumption, and the differences of the biodegradability resulting from different acclimated activated sludge were also discussed.The experimental results indicate that the rank of biodegradability from high to low is chlorobene,o 、m 、p dichlorobenzene and 1,2,4 trichlorobenzene.For the three activated sludges acclimated with chlorobenzenzene,o dichlorobenzene and m dichlorobenzene separately,they can biodegrade these three substrates each other, but not the p dichlorobenzene and 1,2,4 trichlorobenzene.For the two activated sludges acclimated with p dichlorobenzene and 1,2,4 trichlorobenzene,they can biodegrade all five tested organic compounds and improve the biodegradation rate. The analysis shows that these five tested organic compounds can induce to produce two kinds of enzyme system with different characteristics. Cometabolism plays a very important role in the biodegradation process of chlorobenzenes.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1997年第2期142-145,共4页
China Environmental Science
基金
国家自然科学基金
环境模拟与污染控制国家重点联合实验室水污染控制实验室开放基金
