State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China.
School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China.
J Hazard Mater. 2017 May 5;329:159-165. doi: 10.1016/j.jhazmat.2017.01.043. Epub 2017 Jan 24.
The degradations of Reactive Brilliant Red X-3B (RBRX-3B) in an electric-assisted microbial system (EAMS), a microbial system (MS) and an electrochemical system (ECS) were compared. The degradation efficiency of RBRX-3B in EAMS (99.8%) was 10.8% higher than the sum in MS (61.9%) and ECS (27.1%) at 24h at the optimal voltage of 0.4V, indicating that there was a synergistic effect between the electrode reaction and the biodegradation. The RBRX-3B degradation in EAMS followed first-order kinetic model. The activation energy of RBRX-3B degradation in EAMS was calculated to be 60.53kJmol by the Arrhenius equation, showing that the degradation rate of RBRX-3B mainly depended on bio-chemical reaction. RBRX-3B was degraded to both low-strength toxic compounds and nontoxic compounds in EAMS and those intermediates were easier to be further degraded. The pathway of RBRX-3B degradation in EAMS was different from that in MS.
比较了在电辅助微生物系统（EAMS）、微生物系统（MS）和电化学系统（ECS）中活性艳红 X-3B（RBRX-3B）的降解情况。在 24 小时内，最优电压为 0.4V 时，EAMS 中 RBRX-3B 的降解效率（99.8%）比 MS（61.9%）和 ECS（27.1%）的总和高 10.8%，表明电极反应和生物降解之间存在协同作用。EAMS 中 RBRX-3B 的降解符合一级动力学模型。通过阿累尼乌斯方程计算得出，EAMS 中 RBRX-3B 降解的活化能为 60.53kJmol，表明 RBRX-3B 的降解速率主要取决于生化反应。在 EAMS 中，RBRX-3B 被降解为低毒性化合物和无毒化合物，这些中间产物更容易进一步降解。EAMS 中 RBRX-3B 的降解途径与 MS 不同。
