BDD电化学氧化苯酚及垃圾渗滤液研究

ELECTROCHEMICAL OXIDATION OF PHENOL AND LANDFILL LEACHATE WITH BDD ELECTRODES

研究了BDD电化学氧化苯酚废水时电流密度、电解质浓度、初始浓度及pH与降解效率的关系。经正交实验表明,这4个因素影响权重为:电流密度>初始苯酚浓度>Na2SO4浓度>初始pH值。在正交实验的最优工艺参数组合:阳极电流4.5A,初始苯酚浓度为0.47 g/L,Na2SO4浓度为15 g/L,电解液pH为7的条件下,经4 h电解处理,苯酚被完全降解。BDD对垃圾渗滤液有良好降解效果,能有效去除COD和氨氮,并具有优异的脱色效果。

The effects of current density, electrolyte concentration, initial concentration and pH of organic matters on the degradation efficiency of phenol wastewater by electrochemical oxidation with BDD electrodes were evaluated. Orthogonal experiments showed that these four factors＂ effect weight were as follows： current density 〉 initial concentration of phenol 〉 concentration of Na2SO4 〉 initial pH value. The optimal combination of the parameters was as below： anode current, initial concentration of phenol, concentration of Na2SO4 and pH were 4.5 A, 0.47 g/L, 15 g/L and 7, respectively. Under this combined condition, phenol was nearly completely degraded after electrolysis treatment for 4 h. BDD had excellent degradation and decolorization effects on landfill ]eachate, also effectively removed COD and NH4＋ -N.