Ti/PbO_(2)电极电催化氧化处理含盐有机废水的研究

Research on the treatment of saline organic wastewater by Ti/PbO_(2)electrode electrocatalytic oxidation

为了考察电催化氧化法处理含盐有机废水过程中工艺参数对污染物去除能力的影响,对电极材料进行了对比选择,随后采用网状Ti/PbO_(2)电极作为优势阳极,钛板作为阴极处理含盐有机废水.通过正交实验,考察了电流密度、流量、初始pH、板间距、处理时间5个因素对化学需氧量(COD_(cr))、氨氮、总有机碳(TOC)、总氮(TN)的处理效果.实验结果表明,在电流密度为20 mA·cm^(-2)、流量125 mL·min^(-1)、pH为6~7、板间距为2.2 cm、处理时间为5 h的条件下,COD cr、氨氮、TOC、TN去除率分别为71.2%、98.5%、54.3%、93.6%.

In order to investigate the effect of the process parameters of electrocatalytic oxidation on the removal of pollutants from saline organic wastewater,the electrode materials were first compared and selected,and then the Ti/PbO_(2)and the titanium plate were used as dominant anode and the cathode to deal with saline organic wastewater.Through orthogonal experiments,five factors of current density,flow rate,initial pH,plate spacing and treatment time on the treatment effects of chemical oxygen demand(COD_(cr)),ammonia nitrogen,total organic carbon(TOC)and total nitrogen(TN)were investigated,and the appropriate reaction conditions were established.The experimental results show that the removal rates of COD_(cr),ammonia nitrogen,TOC and TN are 71.2%,98.5%,54.3%and 93.6%,respectively,under the conditions of optimal current density of 20 mA·cm^(-2),flow rate of 125 mL·min^(-1),initial pH of 6 to 7,plate spacing of 2.2 cm and treatment time of 5 hours.