Study On Electrocatalytic Oxidation Treatment Of Phenol Waste Water By Titanium-based Oxide Electrodes

Nowadays, the globe becomes more and more industrialized, which results in serious problem of water pollution in many countries. Specially, the bio-refractory organic polluted water comes to be one of the challenging issues due to the lack of effective waste water treatment technology.This work is focused on preparing titanium-based tin dioxide and titanium-doped lead dioxide electrocatalytic electrodes and evaluating the effect and influence factors of the as-prepared electrodes in the treatment of specific organic waste water to optimize the technology for preparation of the electrodes, improve the degradation efficiency, reduce energy consumption, and present some feasible ways for bio-refractory organic waste water treatment.The electrocatalytic oxidation degradation of phenol in simulated waste water was studied by using the as-prepared titanium-based SnO2electrode as anode and titanium electrode as cathode. The effects of current density, initial concentration of phenol, pH value of waste water, electrolyte concentration, and catalyst concentration on the removal percentage of phenol in waste water were systematically investigated. The optimal conditions for effective degradation of phenol in waste water are following:1) pH value of waste water:2;2) catalyst concentration:500ppm;3) electrolyte concentration:0.1mol/L;4) current density:20mA/cm2. For the water containing100ppm phenol, The removal percentage can reach up to96.00%within3h under optimal conditions.The electrocatalytic oxidation degradation of phenol in simulated waste water was studied by using the as-prepared titanium-based PbO2electrode as anode and titanium electrode as cathode. The effects of current density, initial concentration of phenol, pH value of waste water, electrolyte concentration, and catalyst concentration on the removal percentage of phenol in waste water were systematically investigated. The optimal conditions for effective degradation of phenol in waste water are following:1) pH value of waste water:7;2) catalyst concentration:500ppm;3) electrolyte concentration:0.1mol/L;4) current density:20mA/cm2. For the water containing100ppm phenol, The removal percentage can reach up to96.13%within3h under optimal conditions.