Dissertation > Excellent graduate degree dissertation topics show

Study on the Degradation of 2-MIB in Aqueous Solution by ZnOOH Catalized Ozonation

Author: DongLin
Tutor: ChenZhongLin
School: Harbin Institute of Technology
Course: Municipal Engineering
Keywords: ozone ZnOOH catalyzed oxidation 2-MIB hydroxyl radical
CLC: X703
Type: Master's thesis
Year: 2008
Downloads: 84
Quote: 0
Read: Download Dissertation

Abstract


In recent years, eutrophication has become a serious problem due to the discharge of domestic and industrial wastewater. Plankton such as algae blooms, which induces the significant increase of the odor-producing trace organic compounds produced in the microorganism metabolism.Lab-made ZnOOH is used as catalyst and its efficiency in removing trace organic matter-2-Methylisoborneol (2-MIB) cooperated with ozone is studied. The single ozone oxidation process is compared to O3/ZnOOH system. Factors such as ozone dose、catalyst dosage、solution pH、alkalinity、radical inhibitor and water quality difference are analyzed in detail to find those effects on catalysis activity and 2-MIB removal efficiency.Results shows that O3/ZnOOH system is good at removing 2-MIB, and the removal efficiency increases with the catalyst dosage, but when the dose rises up to 400mg, the increasing effect become inconspicuous. pH value is proved to be an important parameter for the 2-MIB removal. Without catalysis, the removal efficiency of 2-MIB increases with the water solution’s pH. The removal effect in basic water is far better than in acid solution. Though catalyst can enhance removal efficiency in acid condition, neutral or alkaline solution benefits the degradation process of O3/ZnOOH system and achieves better effect. HCO3-/ CO32- plays double roles in the 2-MIB degradation. It increases the pH value to benefit the oxidation process and inhibits hydroxyl radical (HO·) at some extent; the study indicates that though high alkalinity reduces the removal efficiency of O3/ZnOOH system, its efficiency is better than that of the process which uses ozone only, Tert-Butanol inhabits 2-MIB removal no matter with or without catalysis-ZnOOH, and this inhibition is even more obvious in O3/ZnOOH system. This result indicates that O3/ZnOOH system promote the HO·produce, and removal reaction procedure in this system follow the mechanism of hydroxyl radical reaction. Removal of 2-MIB is also effected by water quality. free-radical inhibitor tert-butyl alcohol have strong inhibition effect on single ozone oxidation and romoval using O3/ZnOOH system,and even more effective on O3/ZnOOH system, which suggests O3/ZnOOH system can stimulate the generation of HO , and also follow the reaction mechanism of Hydroxyl Radical.The difference of water quality also have effect on romoval of 2-MIB, tap water is better than distilled water in degradation of 2-MIB,and methods using single ozone oxidation removing 2-MIB has poor effcet on water from Songhuajiang River.

Related Dissertations

  1. The Environmental-Friendly Method and Process of Removing Non-Cellulosic Matters from Bamboo for Textile Fiber,TS652
  2. New Technology and Basic Study on the Direet Preparation of PbO Powder from Galena by Selective Leaching Technology,TQ134.33
  3. Effects of Ozone on Ascorbic Acid-Glutathione Cycle in Soybean (Glycine Max) Leaves,S565.1
  4. Study on Advanced Oxidation Technology of Ozonation for Berberine Pharmaceutical Wastewater Treatment,X787
  5. Ozone pre-oxidation and coagulation combined process of removal of arsenic in drinking water,R123.1
  6. Source Profile and Chemical Reactivity of Volatile Organic Compounds (VOCs) form Vehicle Exhaust and Paints,X51
  7. The Research and Implement of Key Technology of Network Management Based Web and SNMP,TN915.07
  8. Design and Implementation of the NMS park,TP311.52
  9. The Clinical Study of Different Concentrate Ozone-oxyen Intraarticular Injection in the Treatment of Knee Osteoarthritis,R684.3
  10. EGSB-MBR- ozone treatment process wastewater bamboo products,X798
  11. SNMP network management system MIB Compiler Implementation and Application,TN915.07
  12. Based on magnetic resonance images of brain glioma MIB-1 index Detection,TP391.41
  13. Ozone disinfection equipment reliability analysis and design,TH771.4
  14. The gaseous phase surface discharge / activated carbon fiber adsorption of bisphenol A joint wastewater treatment,X703
  15. Studies on DBPs and Bromate Control by Ozone Combined Processes in Drinking Water,R123.1
  16. Ozone Autologous Blood Transfusion Treatment on the Fatty Liver of Serum Cytokines,R575.5
  17. Pan management of network devices in the network model,TP393.02
  18. Integrated Management and Implementation of SNMP DoS attack defense system,TP393.08
  19. Experimental Research to Remove Indissolved Methyl Mercaptan with Ultraviolet,X703
  20. Grope for Treatment of the Refractory Organic Compounds in Reverse Osmosis Brine for Pertrochemiscal Wastewater,X703

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