title: Removal of COD and colour in real pharmaceutical wastewater by photoelectrocatalytic oxidation method.
abstract: In this study, TiO2/Ni photo-anode and multi-walled carbon nano-tubes (MWCNTs) air cathode were prepared by the dip-coating method, and the photoelectrocatalytic degradation of real pharmaceutical wastewater was investigated in the self-made reactor. The combination of the TiO2/Ni electrode and MWCNTs air cathode was adopted to treat the pharmaceutical wastewater by the process of photoelectrocatalysis. Various operational parameters to achieve optimum efficiency of this photoelectrocatalytic degradation system are presented, such as applied bias voltage, NaCl concentration, pH and different degradation methods. Under the optimal conditions, the removal of chemical oxygen demand (COD) and colour are 93.5% and 78.5% respectively. The possible roles of the anode-cathode on the reactions and the probable mechanisms of effect were also discussed. The photoelectrocatalytic technology can be used for the long-term treatment of real pharmaceutical wastewater.
authors.affiliation: Department of Chemistry and Chemical Engineering, College of Science, Northeast Forestry University, Harbin 150040, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Fang
authors.forename: Lixia
authors.initials: L
authors.lastname: Liao
authors.forename: Xiangju
authors.initials: X
authors.lastname: Xu
authors.forename: Jinsong
authors.initials: J
authors.lastname: Peng
authors.forename: Yingqi
authors.initials: Y
authors.lastname: Jing
mesh_terms: D057919:Biological Oxygen Demand Analysis; D004345:Drug Industry; D004563:Electrochemistry / Q000379:methods*; D004574:Electromagnetic Fields; D007220:Industrial Waste / Q000517:prevention & control*; D008027:Light; D037742:Nanotubes, Carbon / Q000737:chemistry; D010084:Oxidation-Reduction / Q000528:radiation effects; D010100:Oxygen / Q000737:chemistry / Q000302:isolation & purification*; D010777:Photochemistry / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D037742:Nanotubes, Carbon; D010100:Oxygen; D062065:Wastewater; D014874:Water Pollutants, Chemical