钛基氧化铅阳极电化学降解富里酸的研究

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国家环保部公益性项目

详细信息

STUDY ON ELECTROCHEMICAL DEGRADATION OF FULVIC ACID BY Ti-BASED PbO2 ANODE

摘要: 采用钛基PbO2阳极，分别以Cu和不锈钢为阴极进行了电化学去除富里酸的研究.结果表明PbO2/Cu电解池的去除效果较好.重点考察了PbO2 /Cu电解池中电解时间、外加电压、电解质浓度、pH等对TOC去除率的影响. 结果表明，最佳工艺条件下，TOC去除率接近100%.富里酸电化学降解符合表观一级动力学模型，其速率常数kobs与富里酸初始浓度C呈线性关系.
- 降解
Abstract: Fulvic acid (FA) is a major precursor of disinfection byproducts existing in surface water as natural organic matters. It is essential to control the concentration of fulvic acid in surface water. Using FA as a target pollutant, electrochemical oxidation was carried out using a PbO2 anode and a Cu or stainless steel cathode. The higher performance of electrochemical process in a PbO2/Cu cell was demonstrated. The influencing factors including electrolysis time, cell potential, electrolyte concentration and pH on TOC removal of fulvic acid in a PbO2/Cu cell were examined. Results showed that the degradation efficiency of TOC could approach 100% under the optimized condition. The electrochemical degradation of FA followed the pseudo-first-order kinetic model, and the rate constants were well linear with respect to the initial concentration of FA.
- degradation