Fe(III)-enhanced anaerobic transformation of 2,4-dichlorophenoxyacetic acid by an iron-reducing bacterium Comamonas koreensis CY01.
Fe(III)-enhanced anaerobic transformation of 2,4-dichlorophenoxyacetic acid by an iron-reducing bacterium Comamonas koreensis CY01.
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DOI：
10.1111/j.1574-6941.2009.00796.x
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发表时间：
2010
影响因子：
4.2
通讯作者：
Chunyuan Wu;Zhuang Li;Shungui Zhou;Fangbai Li;Xiao-min Li
中科院分区：
文献类型：
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作者：
Chunyuan Wu;Zhuang Li;Shungui Zhou;Fangbai Li;Xiao-min Li
这项工作研究了朝鲜丛毛单胞菌 CY01 通过耦合电子供体的氧化和 Fe(III) (氢氧化)氧化物的存在增强 2,4-二氯苯氧基乙酸 (2,4-D) 的生物降解来还原 Fe(III) (氢氧化)氧化物的能力。实验结果表明，菌株CY01可以利用水铁矿、针铁矿、纤铁矿或赤铁矿作为末端电子受体，以柠檬酸盐、甘油、葡萄糖或蔗糖作为电子供体。菌株CY01可以通过还原性侧链去除和脱氯将2,4-D转化为4-氯苯酚。在厌氧条件下，菌株CY01的Fe(III)还原和2,4-D生物降解同时发生。 Fe(III)（氢）氧化物的存在将显着增强 2,4-D 生物降解，这可能是由于 Fe(III) 还原产生的反应性矿物结合 Fe(II) 物质可以非生物方式还原 2,4-D。这是首次报道能够还原 Fe(III)（氢）氧化物和 2,4-D 的韩国 C. koreensis 菌株，它扩展了与脱氯相关的铁还原细菌的多样性。
This work studied the ability of Comamonas koreensis CY01 to reduce Fe(III) (hydr)oxides by coupling the oxidation of electron donors and the enhanced biodegradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by the presence of Fe(III) (hydr)oxides. The experimental results suggested that strain CY01 can utilize ferrihydrite, goethite, lepidocrocite or hematite as the terminal electron acceptor and citrate, glycerol, glucose or sucrose as the electron donor. Strain CY01 could transform 2,4-D to 4-chlorophenol through reductive side-chain removal and dechlorination. Under the anaerobic conditions, Fe(III) reduction and 2,4-D biodegradation by strain CY01 occurred simultaneously. The presence of Fe(III) (hydr)oxides would significantly enhance 2,4-D biodegradation, probably due to the fact that the reactive mineral-bound Fe(II) species generated from Fe(III) reduction can abiotically reduce 2,4-D. This is the first report of a strain of C. koreensis capable of reducing Fe(III) (hydr)oxides and 2,4-D, which extends the diversity of iron-reducing bacteria associated with dechlorination.