希瓦氏菌属NTOU1在厌氧条件下对蒽醌染料的生物降解作用
Biodegradation of anthraquinone dyes by Shewanella sp. NTOU1 under anaerobic conditions.
作者信息
Chi Wei-Chiung, Chen Chih-Hung, Liu Shiu-Mei
机构信息
Department of Food Engineering, National Kinmen Institute of Technology, 1-University Road, Kinmen, Chinese Taiwan.
出版信息
Water Sci Technol. 2009;60(4):889-99. doi: 10.2166/wst.2009.417.
Shewanella sp. NTOU1 was able to decolorize a range of anthraquinone dyes [Reactive Blue 4 (RB4), Reactive Blue 19 (RB19), Mordant Red 11 (MR11), Disperse Red 15 (DR15), and Disperse Blue 3 (DB3)] under anaerobic conditions. By supplementing the medium with formate and ferric citrate as the electron donor and acceptor, respectively and cultivating it under the optimum pH (8-9) and temperature (45 degrees C), this strain could decolorize these dyes (1,000 mg/L) at the initial color removal rates of 15-126 mg/L/h and the rates among them were RB19 > RB4 > DB3 > DR15 > MR11. The extent of color removal was in the range of 90-98% for RB19, 86-96% for RB4, 39-41% for MR11, 69-82% for DR15, and 89-91% for DB3. Based on the decolorization products detected by means of GC/MS analyses, probable pathways for the decolorization of these dyes by this strain were proposed.
希瓦氏菌属NTOU1能够在厌氧条件下使一系列蒽醌染料（活性蓝4（RB4）、活性蓝19（RB19）、媒介红11（MR11）、分散红15（DR15）和分散蓝3（DB3））脱色。通过分别向培养基中添加甲酸盐和柠檬酸铁作为电子供体和受体，并在最佳pH值（8 - 9）和温度（45℃）下培养，该菌株能够以15 - 126 mg/L/h的初始脱色速率使这些染料（1000 mg/L）脱色，其中脱色速率顺序为RB19 > RB4 > DB3 > DR15 > MR11。RB19的脱色程度在90 - 98%之间，RB4为86 - 96%，MR11为39 - 41%，DR15为69 - 82%，DB3为89 - 91%。基于通过气相色谱/质谱分析检测到的脱色产物，提出了该菌株使这些染料脱色的可能途径。
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