含氰废水除氰方法研究（Ⅰ）──二氧化铅阳极电解

STUDIES ON THE METHODS OF DECYANATING FROM CYANIDE WASTE WATER (Ⅰ)──Electrolytic Oxidating Cyanide Using Plumbic Dioxide Electrode As Anode

测定了在陶基二氧化铅电极上氧和氰的过电位及析出电位，对二氧化铅阳极电解除氰的电解参数进行了研究．用该法处理含氰浓度５×１０－２％～３％的废水后，残留ＣＮ－离子浓度小于５×１０－５％，电解的电流效率比用石墨阳极电解提高了２倍左右．

In this paper,a method of electrolytic oxidating CN- from waste water,in which plumbic dioxide electrode is used as electrolytic anode,is discussed.The anodic overpotentials of cyanide and oxygen on plumbic dioxide eloctrode were determined,and the electrolytic parameters were also studied.The examples of 5×10-3% to 0.3% waste water containing cyanide were treated by this method.The resutt showed that the residue concentration of CN-was less than 5×10-4%,and the electrolytic current efficiency was about as three times as the general method using plumbago electrode.