蒽醌-2-磺酸盐强化电辅助微生物体系对偶氮染料的脱色效果
发布时间：2018-08-20 12:17
【摘要】：为了提高微生物对偶氮染料的降解效率,将电辅助引入微生物还原降解过程,对比研究了EAMS(电辅助微生物体系)、ECS(电化学体系)和MS(微生物体系)对偶氮染料活性艳红X-3B的降解效果,并考察了不同摩尔浓度的AQS(蒽醌-2-磺酸盐)对电微生物体系降解染料的强化作用.结果表明:反应24 h时,EAMS对活性艳红X-3B的去除率达到99.8%,比MS(去除率为61.9%)和ECS(去除率为27.1%)二者之和还要大10.8%;EAMS对活性艳红X-3B的降解过程符合一级反应动力学特征.当c(AQS)为0.050 mmol/L时,降解最快,一级动力学常数为1.962 h~(-1),是未添加AQS(0.264 4 h~(-1))的7.42倍.加入AQS后,体系中电流升高,说明AQS加快了降解过程中电子传递速率.研究显示,AQS的加入实现了电极-远离电极的微生物-染料之间多相反应界面远程电子传递过程,使整个体系的微生物都可以快速发挥作用,达到强化降解偶氮染料.
[Abstract]:In order to improve the biodegradation efficiency of azo dyes, the electroassisted degradation process was introduced. The degradation effects of EAMS (Electrochemical system) and MS (microbial system) on reactive brilliant red X-3B of azo dyes were studied. The enhancement effect of AQS (anthraquinone-2-sulfonate) on the degradation of dyes by electromicrobial system was investigated. The results showed that the removal rate of reactive brilliant red X-3B was 99.8% at 24 h, which was 10.8% larger than the sum of MS (61.9%) and ECS (27.1%). When c (AQS) was 0.050 mmol/L, the degradation rate was the fastest and the first-order kinetic constant was 1.962 h ~ (-1), which was 7.42 times of that without AQS (0.264 4 h ~ (-1). After the addition of AQS, the current in the system increased, which indicated that AQS accelerated the electron transfer rate in the degradation process. The results show that the addition of AQS can realize the long-distance electron transfer process between the electrode and the microorganism far away from the electrode and the multiphase reaction interface, so that the microorganism of the whole system can play a rapid role to enhance the degradation of azo dyes.
【作者单位】： 天津工业大学环境与化学工程学院;
【基金】：国家自然科学基金项目(51078265)
【分类号】：X703.1
本文编号：2193583
[Abstract]:In order to improve the biodegradation efficiency of azo dyes, the electroassisted degradation process was introduced. The degradation effects of EAMS (Electrochemical system) and MS (microbial system) on reactive brilliant red X-3B of azo dyes were studied. The enhancement effect of AQS (anthraquinone-2-sulfonate) on the degradation of dyes by electromicrobial system was investigated. The results showed that the removal rate of reactive brilliant red X-3B was 99.8% at 24 h, which was 10.8% larger than the sum of MS (61.9%) and ECS (27.1%). When c (AQS) was 0.050 mmol/L, the degradation rate was the fastest and the first-order kinetic constant was 1.962 h ~ (-1), which was 7.42 times of that without AQS (0.264 4 h ~ (-1). After the addition of AQS, the current in the system increased, which indicated that AQS accelerated the electron transfer rate in the degradation process. The results show that the addition of AQS can realize the long-distance electron transfer process between the electrode and the microorganism far away from the electrode and the multiphase reaction interface, so that the microorganism of the whole system can play a rapid role to enhance the degradation of azo dyes.
【作者单位】： 天津工业大学环境与化学工程学院;
【基金】：国家自然科学基金项目(51078265)
【分类号】：X703.1
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