Dissertation > Excellent graduate degree dissertation topics show

Study on Degradation of Aqueous Methyl Orange Solution with Ultrasonic Assisted Fenton Reagent

Author: GuoYong
Tutor: TaoChangYuan；ChenHong
School: Chongqing University
Course: Environmental Engineering
Keywords: Ultrasonic wave Fenton's reagent Methyl orange Azo dyes
CLC: X703
Type: Master's thesis
Year: 2005
Downloads: 383
Quote: 4
Read: Download Dissertation

Abstract


The ultrasonic Chemical is a new branch of chemistry, chemical engineering. Ultrasonic effect can be enhanced the quality of heat transfer and chemical reaction to improve the process rate. According to incomplete statistics, the national of dyeing wastewater discharge about 300 to 400 tons per day. Dye wastewater color and high biodegradability of complex components, is difficult to cost-effectively with traditional wastewater treatment methods for processing. Therefore, the theoretical basis of the unconventional treatment of dye wastewater, methods and techniques of research, has become one of the hot issues of concern. In this paper, a typical azo dye methyl orange objects carry ultrasonic promote Fenton process catalyzed oxidative degradation of methyl orange solution feasibility study. Paper systematically study the ultrasonic promote Fenton process catalyzed oxidative degradation of methyl orange solution of influencing factors and their degradation mechanism, research shows that: ① ultrasound with Fenton's reagent joint role in the degradation of methyl orange solution in a short time to make the most of the organic matter mineralization bleaching, up to less than the same effects as in the ultrasonic alone. This is because of the limited number of ultrasonic cavitation effect produced in the water and OH radicals, · OH radicals generated by Fenton's reagent in water to make up for this shortfall. The ② ultrasonic promote Fenton process catalyzed oxidative degradation of methyl orange solution, the sulfate ion formation law and methyl orange degradation law is consistent, but the sulfate ion generation rate is significantly less than the rate of decolorization. This shows that the catalytic degradation of the methyl orange reaction may be carried out by a multi-step, the bleaching reaction in, compared with the previous step, off-sulfonic acid group the reaction in a later step, the intermediate rate control step may be present, thus affecting the de-sulfonic acid group rate, the final performance of the decolorization rate is greater than the sulfate ion generation rate. The ③ study ultrasonic, Fenton reagent, methyl orange solution under ultrasonic-Fenton reagents decolorization and COD removal behavior. The results show that ultrasonic separate role in the melting of methyl orange, almost no decolorization effect; Fenton alone acting at the concentration of 400 mg / L of methyl orange solution the 30min, methyl orange solution color removal rate of 67.51%, COD go In addition to the rate of 63.15%; interaction of ultrasound and Fenton's reagent, methyl orange solution chroma removal rate of 86.91%, COD removal efficiency of 80.32%. Ultrasound with Fenton's reagent has a synergistic effect of methyl orange solution decolorizing and COD removal. The Fenton reagent decolorizing methyl orange solution strongly acidic oxidation reaction, while at pH> 5, the reduction reaction. By UV - visible spectroscopy shows that the methyl orange maximum absorption wavelength of 490 nm.

Related Dissertations

  1. Intrusion detection based on the ultrasonic echo envelope in the military security patrols,E919
  2. Study on Removal Efficiency of Organic Phosphorus Pesticides Residues by Ultrasonic and Air Bubble Cleaning,S481.8
  3. Iron, lanthanum -doped nano TiO \u003csub\u003e 2 \u003c/ sub\u003e Preparation and photocatalytic properties,O614.411
  4. Research on the Degradation of Straw Fiber for Chemical Derivatives Development,TQ352
  5. Hydroxyapatite modified and photocatalytic degradation of dye performance study,X703
  6. Studies on Preparations of Co-doping TiO2 with Rare Earth and Nitrogen and Its Photocatalytic Properties,TN304.21
  7. The Study of the Ultrasonic Wave Applied in the Nondestructive Test of the Defect Detection,P631.4
  8. Degradation of Methyl Orange Wastewater by Hydroxyl Radical and Ozone,X703.1
  9. Research on the Properties and Microstructure of Rheo-diecasting Al-Si Alloy Based on Ultrasonic Preparing Slurry,TG292
  10. Effect of Si in AL Alloy on Intermetallic Compounds Growth Behavior During Reaction between Solid Ti and Liquid AL,TB331
  11. Preparation and Characterization of Carbon Nanotubes Composite Materials,TB383.1
  12. Research on Hydrous High Pour-point Oil Transportation by Using Supersonic Instead of Heat Tracing,TE832
  13. Study on the Synthesis, Characterization, Quantum Chemistry Calculation and Absorption Spectra of Double-cyanoethyl Azo Dyes,TQ613.1
  14. The Effect of Ultrasound on the Properties and Conformation of Alliinase,O629.8
  15. Study on Measurement of Solid Concentration and Sedimentation Velocity of Liquid Solid Tow Phases Flow,TQ021.1
  16. Preparation and Application of Titanium Dioxide and Manganese Oxide Material,O614.711
  17. Study on the Preparion and Photo-catalytic Capability of Metal Ion Doped Nano Zinc Oxide,O643.36
  18. Ultrasound and Microbubble: Their Functions in Gene Transfection in Vitro and in Vivo,R735.7
  19. The Clinical Study of Ultrasound Wave and Point Stimulation in Preventing and Treating Angina Pectoris of Coronary Heart Disease,R541.4
  20. A Study on the Adsorption Property of Methyl Orange and Congo Red by Chitosan Immobilized on Quartz Sand and CTAB Motified Wheat Staw,X13
  21. Research on Removal and Inhibition of Algae by Ultrasound and Algal Residue Final Processing System,X52

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
© 2012 www.DissertationTopic.Net  Mobile