【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与富里酸初始质量浓度C呈线性关系.更多还原

【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.更多还原