The decolorization effect of anthraquinone 2 sulfonate enhanced electro assisted microbial system on azo dyes

Q2 Environmental Science 环境科学研究 Pub Date : 2017-03-25 DOI:10.13198/j.issn.1001-6929.2017.01.69

张明慧, 曹占平, 李松松

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摘要

In order to improve the degradation efficiency of azo dyes by microorganisms, electrical assistance was introduced into the microbial reduction degradation process. A comparative study was conducted on the degradation effects of EAMS (Electrical Assisted Microbial System), ECS (Electrochemical System), and MS (Microbial System) on the reactive brilliant red X-3B of azo dyes. The strengthening effect of AQS (Anthraquinone-2-sulfonate) with different molar concentrations on the degradation of dyes by the electrochemical microbial system was also investigated. The results showed that, after 24 hours of reaction, The removal rate of active brilliant red X-3B by EAMS reached 99.8%, which is 10.8% higher than the sum of MS (removal rate of 61.9%) and ECS (removal rate of 27.1%); The degradation process of reactive brilliant red X-3B by EAMS follows the first-order reaction kinetics characteristics. When c (AQS) is 0.050 mmol/L, the degradation is fastest, with a first-order kinetics constant of 1.962 h-1, which is 7.42 times that of the system without AQS (0.2644 h-1). After adding AQS, the current in the system increases, indicating that AQS accelerates the electron transfer rate during the degradation process. Research shows that:, The addition of AQS enables the remote electron transfer process at the multiphase reaction interface between the electrode, microorganisms far from the electrode, and dyes, enabling the microorganisms in the entire system to quickly exert their effects and achieve enhanced degradation of azo dyes

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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

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（0.2644 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.

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