Dissertation > Excellent graduate degree dissertation topics show

Experiments on Nitrobenzene by Cavitating Water Jets with Fenton

Author: FengWeiQiang
Tutor: LiXiaoHong；LuYiYu
School: Chongqing University
Course: Mining engineering
Keywords: Cavitating effect nitrobenzene nitrobenzenephthalein hydroxyl radical synergetic effect
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 145
Quote: 1
Read: Download Dissertation

Abstract


Nitrobenzene contamination is a sort of representive organic pollutants which are difficult to be degraded. The numerous amount of nitrobenzene contamination is doing great harm to the environment and can be widely found in industrial waster water. So it must be discharged with an adequate treatment. The disposal methods of nitrobenzene waster water include physical method, chemical method and biological method. However, these methods can’t degrade nitrobenzene adequately. Yet the cavitating water jet can provide extreme condition, high temperature (5000K) and high pressure (1.013×108Pa), which can degrade the complicated organic pollutant. The scholars have applied it to the degrading of PCP, benzene and toluene, but there’s no report of degrading the nitrobenzene.The thesis applies cavitating water jet to degrading nitrobenzene waste water which is prepared in the lab, and then studies the process conditions for degradation techniques of the cavitating water jet only and the technology of Fenton oxidative degradation, combining with cavitating water jets. The results of these two techniques are analyzed and compared. What’s more, the by-products of the technology of Fenton oxidative degradation combined with cavitating water jets on nitrobenzene are analyzed with HPLC, and thus the mechanism of reaction is confirmed. The main contents are as follows:①The best action condition to degrade the polluted water that includes nitrobenzene by cavitating water jet only is that pH reaches 3.0, initial nitrobenzene concentration hits 50mg/L, confining pressure hits 0.5MPa, reaction time touches 30 minutes and pumping pressure reaches 10Mpa. The degrading rate is most significant, reaching 31.89%. However, for the techniques of cavitating water jet combining Fenton, the degrading rate is 95.06%.Meanwhile, the best action condition is that Fe2+ concentration reaches 40mg/L, Fenton concentration touches 150mg/L, confining pressure hits 0.5MPa, pH reaches 3.0 and pumping pressure hits 10Mpa. So the techniques of cavitating water jet combining Fenton can degrade the nitrobenzene effectively.②Through examing the influence of dosage of HO·radical scavenger on degradation effect of nitrobenzene and the analysis of HPLC, it can be concluded that the mechanism of cavitating degradation of nitrobenzene is oxidizing of HO·. And then the mechanism of reaction of the technology of Fenton degradation combining cavitating water jets on nitrobenzene has been confirmed. Cavitating Water Jets can make Fenton release more HO·as well as enhance the catalytic capacity of Fe2+, so as to directly degrade or oxidative nitrobenzene, which turns into some small organic molecules such as chain hydrocarbon and organic acids etc.③Synergetic effect of cavitation and nitrobenzenephthalein has appeared in the technology of nitrobenzenephthalein oxidative degradation combining cavitating water jets on nitrobenzene. The promoted factor for nitrobenzene degradation rate constant to be at about 2.37.

Related Dissertations

  1. Study of Nitrobenzene Wastewater’s Treatment by Combination of Immobile Phanerochaete Chrysosporium and Activated Sludge,X703
  2. TiO 2 nanotube synthesis and modification and photocatalytic properties of,O643.32
  3. NZVI/SBA-15 composite material synthesis and removal mechanisms of nitrobenzene in water,X703
  4. Microbial fuel cell processing aniline and nitrobenzene wastewater,TM911.4
  5. Titanium-based metal oxide coating preparation and application of the electrodes,X703
  6. Study on Treating Organic Waste-water by Photoelectrocatalytic Oxidation Pillared Clay Mineral Materials,X703
  7. Research on the Prepration of 2, 4 (2,6)-Dimethyl Nitrobenzene by m-Xylene Nitrating,TQ246.1
  8. The Study of the Remediation of Soil Polluted by Nitrobenzene and the Disposal of Leaching Water,X53
  9. Study on Electrochemical Electrode Behavior of Nitrobenzene Compouds,X756
  10. In-situ Bioremediation of Complex Organic Polluted Groundwater by Bio-augmentation in Laboratory,X172
  11. Study on the Biodegradation Characteristics of Nitrobenzzene in Weihe Water Sample and the Medium,X13
  12. Study on Migration of Nitrobenzene in Groundwater,X131.2
  13. Study on Zero Valent Iron and Magnetism on Anaerobic Biodegradation of Nitrobenzene,X703
  14. Ethylenediamine-assisted Solvothermal Synthesis of CdxZn1-xS Solid Slutions and Their Photocatalytic Reduction for Nitrobenzene,TB383.1
  15. On incidents emulsion containing toluene and nitrobenzene wastewater treatment emergency control strategies,X703
  16. Removal of Microcystis Aeruginosa-Synthetic Organic Compounds Pollution by Pre-Oxidtion and Coagulation-Precipitation,TU991.2
  17. The Screening Strain of Dehalogenases,Q93
  18. Microemulsion was prepared electrochemical reduction of nitrobenzene Aminophenol,O625.312
  19. The Effective Conversion of Nitrobenzene in Bioelectrochemical System (BES),X703
  20. Isolation and Breeding of High Efficient Strain of Benzmoid Organics Degradation from Baiyangdian,X172
  21. Study on Wastewater Treatment of Aniline and Nitrobenzene with Solvent Extraction,X783

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