三维电极体系降解含酚废水的研究

Degradation of Phenol-containing Wastewater by Three-dimensional Electrode System

利用有机物易于接枝修饰的优点,以壳聚糖基有机物为粒子电极、Ti/Sn-Sb-La钛锡电极为阳极、石墨电极为阴极,构建了三维电极体系,研究了其对含酚废水的降解效果,并探究了降解机制。结果表明,因为壳聚糖基粒子电极的填充,构建的三维电极体系极板间距缩小、比表面积增大、活性反应位点增加、传质速率加快,降解速率显著提高,其对150 mg•L^(-1)含酚废水的100 min降解率可以达到80%,且废水浓度较高时降解速率较快。

Taking advantage of the easy grafting modification of organic compounds,we constructed a three-dimensional electrode system by using chitosan-based organic compounds as particle electrode,Ti/Sn-Sb-La titanium-tin electrode as anode,and graphite electrode as cathode.Moreover,we studied the degradation effect-iveness of the system to phenol-containing wastewater,and explored the degradation mechanism.The results show that,due to the filling of chitosan-based particle electrode,the electrode spacing of the constructed three-dimensional electrode system reduces,the specific surface area and the active reaction sites increase,the mass transfer rate acculerates,and the degradation speed significantly increases.The degradation rate of 150 mg•L^(-1) phenol-containing wastewater can reach 80%in 100 min by using the constructed three-dimensional electrode system,and the degradation speed is faster when the wastewater concentration is high.