中国环境科学
中國環境科學
중국배경과학
CHINA ENVIRONMENTAL SCIENCE
2010年
5期
694-698
,共5页
杨秀清%郑媛%李鹏丽%王婧人
楊秀清%鄭媛%李鵬麗%王婧人
양수청%정원%리붕려%왕청인
Rhodococcus sp.R04%降解%多卤代联苯
Rhodococcus sp.R04%降解%多滷代聯苯
Rhodococcus sp.R04%강해%다서대련분
Rhodococcus sp.R04%degradation%polyhalogenated biphenyls
研究了不同取代元素以及取代元素的数量、位簧等因素对Rhodococcus sp.R04降解多卤代联苯的影响.结果表明,联苯苯环第4位上的氢分别被氟、氯、溴以及甲基基团取代后降解率由高到低依次为4-FB>4-CB>4-MB>4-BrB;当取代元素相同时,随着取代原子数目的增加,多卤代联苯降解率降低;当取代元素及取代原子数目相同时,不同位置的取代对卤代联苯的降解影响较大,特别是2,6位取代会强烈抑制关键酶对卤代联苯的催化降解,导致降解率降低.
研究瞭不同取代元素以及取代元素的數量、位簧等因素對Rhodococcus sp.R04降解多滷代聯苯的影響.結果錶明,聯苯苯環第4位上的氫分彆被氟、氯、溴以及甲基基糰取代後降解率由高到低依次為4-FB>4-CB>4-MB>4-BrB;噹取代元素相同時,隨著取代原子數目的增加,多滷代聯苯降解率降低;噹取代元素及取代原子數目相同時,不同位置的取代對滷代聯苯的降解影響較大,特彆是2,6位取代會彊烈抑製關鍵酶對滷代聯苯的催化降解,導緻降解率降低.
연구료불동취대원소이급취대원소적수량、위황등인소대Rhodococcus sp.R04강해다서대련분적영향.결과표명,련분분배제4위상적경분별피불、록、추이급갑기기단취대후강해솔유고도저의차위4-FB>4-CB>4-MB>4-BrB;당취대원소상동시,수착취대원자수목적증가,다서대련분강해솔강저;당취대원소급취대원자수목상동시,불동위치적취대대서대련분적강해영향교대,특별시2,6위취대회강렬억제관건매대서대련분적최화강해,도치강해솔강저.
Three influencing factors,including different substituted elements,numbers and position of substituted elements were investigated to correlate structural features to degradation of polyhalogenated biphenyls by Rhodococcus sp.R04.For mono-substituents.degradation preference of R.sp.R04 were in the order 4-FB>4-CB>4-MB>4-BrB.When the substituted elements were same,degradation rotes of halogenated biphenyls reduced as halogen substitution increased.The strain Was relatively insensitive to the halogen substitution pattern on the biphenyl ring,when halogenated biphenyls containing the same halogen substitution and numbers,the effect of the position of substituted halogen on the degradation of polyhalogenated biphenyls was great,especially 2,6-CB,which intensively showed striking resistance to degradation,eventually led to the reduction of degradation rates.