金刚石薄膜电极处理含氯酚废水的实验研究

以硼掺杂金刚石薄膜(BDD)为电极,采用电化学氧化的方法对含氯酚废水进行实验研究。采用循环流动的方式,结果表明:在给定不同恒电位的情况下,电流随时间变化的规律也不同;在高电位时电流密度比较大,使间接氧化增强,导致COD去除率和瞬时电流效率(ICE)增大;由于支持电解质N aC l在电解过程中产生的次氯酸盐氧化性强,因此N aC l比H2SO4对COD去除率和ICE增大更有利。采用钛基活性涂层(ACT)电极与金刚石电极的对比实验发现:由于BDD电极的弱吸附性,其处理效果明显优于ACT。

Experimental investigation of treatment of wastewater containing chlorophenols using boron-doped diamond film electrodes

The electrochemical oxidation of wastewater containing chlorophenols was investigated experimentally using synthetic boron-doped diamond(BDD) thin film electrodes.The variation of the current with time differs for the different galvanostatic potentials.Higher current densities resulting from higher cell voltages increase the formation of indirect reagents resulting in an increased COD removal rate and increased instant current efficiency(ICE).The stronger oxidation of hypochlorite from NaCl in the supporting media during galvanostatic electrolysis results in an increased COD removal rate and increased ICE than with H_2SO_4.The electrochemical characteristics of BDD electrodes were also investigated by comparing them with an active coating Ti(ACT) substrate anode.The experimental results show that BDD is markedly superior to ACT due to its weak absorption properties.