Printing and dyeing wastewater has the characteristics of high content of organic pollutants, high difficulty in treatment, strong alkalinity, and high chroma. The electrochemical method for treating printing and dyeing wastewater has the advantages of simple equipment, no secondary pollution, thorough degradation, and high chroma removal rate. At present, crystal violet has been widely used as a dye in biological dyeing, medicine, leather and other fields. However, crystal violet is a toxic, high-residue "three-hazard" substance. Crystal violet wastewater discharged into the water without effective treatment will cause serious harm to the environment, which has driven the development of research on the degradation of crystal violet). We used a homemade Ti/SnO2-RuO2 anode to degrade crystal violet wastewater. The results showed that the factors affecting the degradation were: current density i, NaCl content in the solution, pH and temperature. Under the conditions of i=2.5mA/Lm2, NaCl concentration of 2.5g/L, pH=7, T=25℃, the degradation was 40min, and the removal rates of crystal violet and COD in the wastewater were as high as 98.9% and 85.3%, respectively. We used a homemade Ti/SnO2-RuO2 anode to form a three-dimensional electrode system to treat methylene blue simulated wastewater. It was concluded that the decolorization effect of the homemade electrode was significantly better than that of other electrodes. After 60 minutes of electrolysis, the methylene blue decolorization rate and COD removal rate could reach 87.83% and 74.45%, respectively.
The multi-component ruthenium-coated titanium anode has good treatment effects on organic pollutant wastewater due to its good electrocatalytic activity, low working voltage and long life. From the aspects of electrode preparation conditions, active coating composition, electrolysis conditions, etc., domestic and foreign scholars have carried out in-depth research, among which the rare earth element doped modified ruthenium titanium anode is worthy of further exploration. When using ruthenium-coated anodes to treat high-chlorine heavy metal wastewater, chlorine evolution and oxygen evolution reactions occur simultaneously. The production of chlorine will damage the health of workers on the one hand, and reduce the current efficiency on the other hand, which is not conducive to energy saving. Coating a negatively charged active exchange coating on the surface of the anode coating produces electrostatic repulsion of chloride ions, which can effectively inhibit the production of chlorine. However, the binding force between the electrode and the active exchange coating is often weak, and the exchange coating is easy to fall off and inactivate. Therefore, enhancing the viscosity between the coatings and inhibiting the production of chlorine will become a future development trend.
Baoji JM-TITANIUM-Professional anode design and manufacturer
Over the years, we have been specialized in anode research and development, production and manufacturing, and our products are exported to many countries around the world. Various series of anodes can be designed and produced according to the actual environmental parameters of different users. You are welcome to visit and negotiate.
Nicole
Company: Baoji Jimiyun Dynamic Co., Ltd
Country:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel:+86 13369210920
Gmail:nicole@jmyunti.com
Website:www.jm-titanium.com
