Identification of the Intermediates of in Vivo Oxidation of 1,4-Dioxane by Monooxygenase-Containing Bacteria

SHAILY  MAHENDRA; CHRISTOPHER   J.   PETZOLD; EDWARD   E.   BAIDOO; JAY  D.   KEASLING; LISA  ALVAREZ-COHEN

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Identification of the Intermediates of in Vivo Oxidation of 1,4-Dioxane by Monooxygenase-Containing Bacteria

机译：含单加氧酶的细菌体内氧化1，4-二恶烷的中间体的鉴定

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1,4-Dioxane is a probable human carcinogen and an emerging water contaminant. Monooxygenase-expressing bacteria have been shown to degrade dioxane via growth-supporting as well as cometabolic mechanisms. In this study, the intermediates of dioxane degradation by monooxygenase-expressing bacteria were determined by triple quadrupole-mass spectrometry and Fourier transform ion cyclotron resonance-mass spectrometry. The major intermediates were identified as 2-hydroxyethoxyacetic acid (HEAA), ethylene glycol, glycolate, and oxalate. Studies with uniformly labeled ~(14)C dioxane showed that over 50% of the dioxane was mineralized to CO_2 by CB1190, while 5% became biomass-associated after 48 h.

机译：1,4-二恶烷可能是人类致癌物，也是一种新兴的水污染物。已表明表达单加氧酶的细菌可通过生长支持和新陈代谢机制降解二恶烷。在这项研究中，通过三重四极杆质谱法和傅里叶变换离子回旋共振质谱法测定了表达单加氧酶的细菌降解二恶烷的中间体。鉴定出的主要中间体为2-羟基乙氧基乙酸（HEAA），乙二醇，乙醇酸酯和草酸酯。用统一标记的〜（14）C二恶烷进行的研究表明，超过50％的二恶烷被CB1190矿化为CO_2，而5％的48小时后与生物质相关。

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来源
《Environmental Science & Technology》 |2007年第21期|7330-7336|共7页
作者
SHAILY MAHENDRA; CHRISTOPHER J. PETZOLD; EDWARD E. BAIDOO; JAY D. KEASLING; LISA ALVAREZ-COHEN;
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作者单位

Department of Civil and Environmental Engineering, Rice University, MS-317, P.O. Box 1892, Houston, TX 77251;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类环境化学;
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2. Corrigendum to 'Effectiveness of zinc oxide-assisted photocatalysis for concerned constituents in reclaimed wastewater: 1,4-Dioxane, trihalomethanes, antibiotics, antibiotic resistant bacteria (ARB), and antibiotic resistance genes (ARGs)' [Sci.Total Environ. 649 (2019) 1189-1197] [J] . Hwangbo Myung, Claycomb Everett Caleb, Liu Yina, The Science of the Total Environment . 2019,第MARa10期

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4. Treatment of 1,4-Dioxane in Groundwater using Advanced Oxidation Processes: UV/Peroxide, Ozone/Peroxide, and UV/Titanium Dioxide [C] . L. Wojcicka, E. Edwards, J. Cavalcante World Congress on Ozone and Ultraviolet Technologies . 2007

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机译：氧化锌辅助光催化在回收废水中的氧化锌辅助光催化的有效性：1,4-二恶烷，三卤代甲烷，抗生素，抗生素抗性细菌（ARB）和抗生素抗性基因（Args）
8. 1,4-Dioxane Remediation by Extreme Soil Vapor Extraction (XSVE). Screening-Level Feasibility Assessment and Design Tool in Support of 1,4-Dioxane Remediation by Extreme Soil Vapor Extraction (XSVE). [R] . Hinchee, R. 2017

机译：极端土壤蒸汽萃取（XsVE）对1,4-二恶烷的修复。通过极端土壤蒸汽提取（XsVE）支持1,4-二恶烷修复的筛选级可行性评估和设计工具。

Identification of the Intermediates of in Vivo Oxidation of 1,4-Dioxane by Monooxygenase-Containing Bacteria

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