当前位置：
X-MOL 学术
›
Environ. Sci. Technol. Lett.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
A Mixed Microbial Community for the Biodegradation of Chlorinated Ethenes and 1,4-Dioxane
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2018-12-19 , DOI: 10.1021/acs.estlett.8b00591 Alexandra LaPat Polasko 1 , Alessandro Zulli 1 , Phillip B. Gedalanga 2 , Peerapong Pornwongthong 3 , Shaily Mahendra 1
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2018-12-19 , DOI: 10.1021/acs.estlett.8b00591 Alexandra LaPat Polasko 1 , Alessandro Zulli 1 , Phillip B. Gedalanga 2 , Peerapong Pornwongthong 3 , Shaily Mahendra 1
Affiliation
|
We developed a microbial community capable of biodegrading mixtures of chlorinated ethenes and 1,4-dioxane under varying redox conditions. Achieving the removal of chlorinated ethenes as well as 1,4-dioxane to below health advisory levels in groundwater that has anaerobic and aerobic zones has proven to be challenging. However, our mixed community, composed of the anaerobic chlorinated ethene-degrading consortium KB-1 and aerobic bacterial strain, Pseudonocardia dioxanivorans CB1190, was able to reduce trichloroethene (TCE) in anaerobic environments and oxidize 1,4-dioxane in the presence of oxygen. Aerobic biodegradation of cis-1,2-dichloroethene by CB1190 was also confirmed, thus decreasing the accumulation of TCE transformation products, such as vinyl chloride. The results of this study demonstrate that the assembled microbial community not only survived significant redox changes but sequentially biodegraded chlorinated ethenes and 1,4-dioxane. This approach toward degrading mixed contaminants with a consortium containing anaerobic and aerobic bacteria provides greater insight as to when and how to transition from active enhanced reductive dechlorination to enhanced aerobic attenuation of chlorinated ethenes and 1,4-dioxane.
中文翻译：
氯化乙烯和1,4-二恶烷生物降解的混合微生物群落
我们开发了一种微生物群落，能够在不同的氧化还原条件下生物降解氯化乙烯和1,4-二恶烷的混合物。在具有厌氧和好氧区的地下水中，要使氯化乙烯和1,4-二恶烷的去除达到低于健康建议的水平已被证明具有挑战性。但是，我们的混合社区由厌氧氯化乙烯降解财团KB-1和好氧细菌菌株假单胞菌二恶草腈组成CB1190能够在厌氧环境中还原三氯乙烯（TCE），并在氧气存在下氧化1,4-二恶烷。还证实了CB1190有氧生物降解顺式1,2-二氯乙烯，从而减少了三氯乙烯（TCE）转化产物（如氯乙烯）的积累。这项研究的结果表明，组装后的微生物群落不仅能经受住明显的氧化还原变化，而且还能被生物降解的氯化乙烯和1,4-二恶烷所降解。这种用含有厌氧和好氧细菌的财团降解混合污染物的方法，可以更好地了解何时以及如何从主动增强的还原性脱氯转变为增强的氯化乙烯和1,4-二恶烷的有氧衰减。
更新日期：2018-12-19
中文翻译：
氯化乙烯和1,4-二恶烷生物降解的混合微生物群落
我们开发了一种微生物群落，能够在不同的氧化还原条件下生物降解氯化乙烯和1,4-二恶烷的混合物。在具有厌氧和好氧区的地下水中，要使氯化乙烯和1,4-二恶烷的去除达到低于健康建议的水平已被证明具有挑战性。但是，我们的混合社区由厌氧氯化乙烯降解财团KB-1和好氧细菌菌株假单胞菌二恶草腈组成CB1190能够在厌氧环境中还原三氯乙烯（TCE），并在氧气存在下氧化1,4-二恶烷。还证实了CB1190有氧生物降解顺式1,2-二氯乙烯，从而减少了三氯乙烯（TCE）转化产物（如氯乙烯）的积累。这项研究的结果表明，组装后的微生物群落不仅能经受住明显的氧化还原变化，而且还能被生物降解的氯化乙烯和1,4-二恶烷所降解。这种用含有厌氧和好氧细菌的财团降解混合污染物的方法，可以更好地了解何时以及如何从主动增强的还原性脱氯转变为增强的氯化乙烯和1,4-二恶烷的有氧衰减。
京公网安备 11010802027423号