Study On The Treatment Of Chlorophenol Wastewater By Three Dimensional Electrode Photoelectrocatalytic Degradation

In this paper, based on the characteristics of the three dimensional electrode photo-electroncatalytic degradation, MgPC-TiO2/bamboo charcoal composite was prepared by sol-gel method with easy recycling and high efficiency. Used some different test technologies, such as XRD, UV-VIS, SEM, IR to research its structure, composition and light absorption. With toxic and difficult degradation of trichlorophenol (TCP) as pollutants, the catalytic activity and catalytic degradation photoelectric effect of compound material were studied with three dimensional electrode assistance. Studying on the catalytic activity and the photo catalytic degradation effect of the compound material under three dimensional electrode, and the preparation of compound material and reaction conditions of photocatalytic degradation were analyzed in detail. The conclusions are shown as follow:1. The composite material mineral phase was changed with different temperature,from amorphous to anatase. The TiO2was firmly loaded on bamboo charcoal especially near the big holes which on the surface of the bamboo charcoal. The specific surface area and total pore volume of TiO2modified bamboo charcoal could be improved in a certain extent, so the adsorption and degradation capability of chlorophenol increased. And due to bamboo charcoal good adsorption performance, MgPC restrain the role of light born electronic and hole compound so that the photocatalysis has strong effect of degradation.2. Through the researching we got the best photocatalytic reaction conditions:TCP concentration25mg/L, duple loading layers, MgPC doping quantity for1wt%,2hours calcination under400℃, catalyst dosage1g/L, pH=5, the removal rate after degradation for180minutes reached88.46%.3. Three dimensional particle electrode could increase the electrode surface area, provide larger current intensity by lower current density, shorten the moving distance of the particle pollution and shorten the moving distance of the particle pollution. This paper combined the characteristic of three dimension electrode and the photocatalytic degradation to fulfill the combination achieved photoelectric collaborative catalytic reaction. The best degradation conditions:the initial TCP concentration25mg/L, slot voltage12V, the distance of plate6cm, pH=5, particle electrode (MgPC-TiO2/bamboo charcoal)1g/L, electrolyte Na2SO43g/L, and reaction to120minutes the removal rate can reach93.13%.