State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Harbin 150090, PR China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Harbin 150090, PR China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Bioresour Technol. 2014;152:530-3. doi: 10.1016/j.biortech.2013.11.001. Epub 2013 Nov 10.
Pseudomonas sp. WYZ-2 was isolated from a biocathode which accelerating azo dye decolorization. When the electrode was polarized at -0.8 V (vs. SCE), WYZ-2 could exist on electrode, because the current of working electrode stabilized at -0.35 mA from -0.13 mA after inoculation. Moreover, cyclic voltammetry scanned an unidentified redox-active molecule which involved in the electron charge transfer potentially. On azo dye decolorization experiments by WYZ-2 modified electrode, electrochemical tests also indicated that the catalytic ability of WYZ-2 modified electrode was improved because charge transfer resistance decreased to 255 Ω from 720 Ω, azo dye reduction potential was shifted to -0.78 V from -0.89 V, and the maximum decolorization efficiency of azo dye was increased to 93.4% from 53.2%, comparing with unmodified electrode. Although numerous studies on azo dye decolorization employed biological agents, electrochemical activity bacteria accelerate the decolorization process using electrode as sole electron source has seldom been reported.
从生物阴极中分离到一株假单胞菌 WYZ-2，该阴极可加速偶氮染料的脱色。当电极在-0.8 V（相对于 SCE）极化时，WYZ-2 可以存在于电极上，因为接种后工作电极的电流从-0.13 mA 稳定在-0.35 mA。此外，循环伏安扫描到一种潜在参与电子电荷转移的未知氧化还原活性分子。在 WYZ-2 修饰电极对偶氮染料脱色实验中，电化学测试也表明，WYZ-2 修饰电极的催化能力得到提高，因为电荷转移电阻从 720 Ω降低到 255 Ω，偶氮染料还原电位从-0.89 V 移至-0.78 V，最大脱色效率从 53.2%提高到 93.4%，与未修饰电极相比。尽管许多偶氮染料脱色研究都采用了生物制剂，但很少有报道称电化学活性细菌使用电极作为唯一电子源来加速脱色过程。
