Study On Removal Of Colored Organics In Paper-making Wastewater By Electroflocculation And Electrocatalytic Oxidation Methods

Electrochemical methods used in environmental contaminants treatment have attracted more and more attentions for recent several decades. In these methods, electroflocculation has reached profitable commercialization in some industrial wastewater treatment. For electrocatalytic oxidation, a "environment friendly green technology", investigative interest focus on developing new electrode material recently. Our work aimed at removal of colored organics in paper-making wastewater by electroflocculation and electrocatalytic oxidation. Work has been carried out as follow:1. To investigate main factors that influence removal efficiency of colored organics from paper-making wastewater by electroflocculation when Fe and Al metal was used as anode respectively.2. To investigate initially electrocatalytic oxidation efficiency of PbO2 and SnO2 electrodes doped some transition metal ions.Main experimente conclusions are given as follow:1. Main factors that influence removal efficiency of colored organics from the wastewater are charge loading and pH value by electroflocculation when Fe and Al was used as anode respectivily. Under perfect treatment conditions, high removal efficiency of colored organics is obtained for the wastewater, Qs% = 78.6%, Qc% = 64.5% for Fe anode; Qs% = 62.2% , Qc% = 58.0% for Al anode.2. Doping Ni(II) to SnO2 electrode can remarkly increase oxidation efficiency of the electrodes. The oxidation efficiency of SnO2 electrode doped 4.0 wt.% Ni(II) is highest in all SnO2 electrodes doped Ni(II). Main factors that influence electrocatalytic oxidation efficiency are charge loading and current density for the SnO2 electrode containing 4.0 wt.% Ni (II).