Dissertation > Excellent graduate degree dissertation topics show

Study of Degrade Dyeing Effluent by Modify Immobilized Nano-TiO2

Author: XiaYang
Tutor: HeZuoZuo
School: Donghua University
Course: Applied Chemistry
Keywords: TiO2 photocatalyst dyeing effluent surface modification transition metal ions dope plasma
CLC: X791
Type: Master's thesis
Year: 2008
Downloads: 39
Quote: 0
Read: Download Dissertation

Abstract


In recent years, the environment problem has been a focus around the world, The environmental protection in our country enters a new period, The idea of "Clean-work" has been accepted by people. "Clean-work" is a strategic measure guarding comprehensively against environmental pollution during Industrial processes. With the principles of saving energy, reducing material usage and minimizing the waste material, clean-work tries to resolve the environmental problems within producing processes themselves. In dyeing and finishing industry, clean-work consist of optimizing the producing formula, minimizing and cleaning the waste material. The dyeing water in dyeing production contains high quantity of organic materials, with high color strength and COD value, belonging to high concentration dyeing effluent. Dyeing of colored fabric consumes a lot of water. So, if dyeing wastewater can be treated, the pollution of dyeing production will be reduced dramatically, which may be regarded as a good approach to "Clean-work".To reduce the dyeing effluent pollution to environment, mainly to reduce its color and COD values. The deep oxidation capacity of TiO2 photocatalyst in dealing with dyeing effluent can degrade organic matter effectively, in order to achieve the purpose of lower color and COD values. This paper studied two methods of immobilized TiO2 film surface modification, which are transition metal ions dope and atmospheric RF plasma surface treat. Discussed several important factors that influence the quality of immobilized TiO2 film in Sol - gel prepare process, compared the practical application results of transition metal ions dope and atmospheric RF plasma surface treat, measured the decolorization rate and the COD degradation rate of dyeing effluent after photocatalytic reaction. Studied the surface characteristics of TiO2 film that after atmospheric RF plasma modification, by using FE-SEM, XRD, XPS, UV-VIS and other techniques. And analyzed the causes of enhanced photocatalytic activity after transition metal ions dope and atmospheric RF plasma surface treat. Compared these tow surface modification methods with their advantages and disadvantages. The experimental results show that the amount of added water and the types of acid and solvent in the Sol preparation process, as well as the coating frequency and calcination temperature in the photocatalyst film preparation process are influence the quality of TiO2 film. After transition metal ions dope and atmospheric RF plasma surface treat, their photocatalytic activity has varying degrees of increase. There is a best doping concentration of transition metal ions (Fe3+、Sn4+), Fe3+ and Sn4+ respectively 2.00% and 3.00%. After atmospheric RF plasma surface treatment, the thickness of TiO2 film is about 1 um, the TiO2 particles distributed evenly with an average diameter of 20.5 nm, the crystal form is basically Anatase, and the optical response range of TiO2 film has a trend to move to the visible light region. The TiO2 films modified by these two methods all have advantages of low energy consumption, non-selective mineralization, degradation complete, cheap, without secondary pollution and can be use repeatedly. While the process of both preparation and use is simple by modified with atmospheric RF plasma, it can be operate continuously, do not need any additives such as heavy metal or its compounds. Moreover, the TiO2 film modified by atmospheric RF plasma can absorb light of greater wavelength, improve the utilization rate of the light source, and reduce the light source requirements.

Related Dissertations

  1. Preparation and Tribological Properties of TZ3Y20A-SrSO4 Ceramic Matrix Composites,TB332
  2. Experimental Investigation and Mechanism Exploration on the Degradation of N-heterocyclic Compounds with Dielectric Barrier Discharge,X703
  3. Optical Spectrum Diagnose of Stationary Plasma Thruster Channel Wall Sputtering Erosion,V433.9
  4. Study on LC Resonance Charge and POS Based Pulsed Power Supply,TN782
  5. Research on the Methods of Nasopharyngeal and Gastric Cancer Detection Based on Surface-enhanced Raman Spectroscopy,R739.63
  6. Preparation of Crop Stalk-Based Sorption Materials with High Performances and Their Applications for Pah Removal from Water,X712
  7. Synthesis and Biocompatibility of different types of hydrophilic surface - modified polyurethane,R318.08
  8. The Application of Eggshell Membrane for Solid-phase Extraction and the Determination of Trace Metal Elements in Environment Water,X832
  9. Study on Separation、 Preconcentration and Analysis of Trace Elements with Carbon Nanometer Materials,TB383.1
  10. Research on PSA/Cotton Blend Fabric of Coatinging of Water Resistance and Moisture Permeability,TS195.6
  11. Preparation and Property Study of Polyaniline/Polyester Composite Conductive Fabric,TS195.6
  12. Study on Processing Functionalities and Application of Bovine Plasma Proteins,TS251.1
  13. Proteomic Research of Rice Plasma Membrane Protein under Blast Stress,S511
  14. Study on Ca2+/H+ Antiporter Avtivity and Its Gene Expression of Apple,S661.1
  15. Study on the Anesthestic Quality, Blood Concentration and Clinical Application of Shumianning Administered Intravenously by Continuous Rate Infusion Using Microinjection Pump in Dogs,R965
  16. Study on Effect of Recombination on Functionalities of Salt-Soluble Proteins from Pork,TS251.1
  17. GC-MS Analysis of Endogenous Metabolites in Plasma of Police Dog after Aflatoxicosis,S858.292
  18. Pharmacokinetics of Progesterone Cream in Beagle Dogs Determined with LC-MS/MS,R96
  19. Microdialysis Combine with Hollow Semipermeable Membrane Microextraction,R917
  20. Study on the Screening and Properties of Degradation Coking Waste Water Advantage Strains,X172
  21. Studies on the Interaction between Biomolecules by Surface Plasmon Resonance Technology and Fluorescence Spectrometry,Q503

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > Light industrial waste disposal and comprehensive utilization > Textile, printing and dyeing industry
© 2012 www.DissertationTopic.Net  Mobile