Dissertation > Excellent graduate degree dissertation topics show

The Study of Multi-equilibrium and Kinetics in the Adsorption Processes

Author: FanJianXin
Tutor: ShenDaZhong
School: Shandong Normal University
Course: Analytical Chemistry
Keywords: Bentonite Modified bentonite Adsorption isotherm Dynamics Cloud point extraction
CLC: X703
Type: Master's thesis
Year: 2010
Downloads: 191
Quote: 1
Read: Download Dissertation

Abstract


In this thesis, using multiple linear regression chemometric methods to conduct a comprehensive analysis of the simulated wastewater system in the process of removing a series of UV-visible absorption spectra thus obtained between the adsorption of each component in the process of competition or synergy adsorption of mechanism. The second chapter of bentonite cationic dye adsorption isotherms and kinetics studies. Bentonite as adsorbent, study malachite green, saffron red, rhodamine B dye decolorization mixed. The study showed that the bentonite on the cationic dye has a good adsorption performance, the initial concentrations of the three dyes 500μmol / L under the conditions, and adding the amount of bentonite is 0.64, 0.98 and 1.05 g / L, respectively safranine malachite green and rhodamine B decolorization rate could reach 95%. Exists between each of the dye mixed adsorption system, competitive adsorption, bentonite dosage case, adsorption constants larger dye preferentially adsorbed, Rhodamine B and Malachite Green are desorbed in the the ternary mixed adsorption process appears phenomenon. The study results showed that the adsorption kinetics, dye adsorption kinetics of single-component and mixed systems dynamics process in line with the second-order kinetics model. Meanwhile, the single dye system adsorption isotherm and diverse mixed system in line with the total adsorption isotherm Langmuir isotherm model. Chapter organic - sorb anionic dyes kinetics and isotherms. In order to improve the performance of the sorb dyes, poly dimethyl diallyl ammonium chloride (PDADMA) and sodium bentonite as raw materials, synthetic cationic PDADMA modified bentonite, its anionic dye adsorption capacity of the wastewater has been very greatly increased. This polyelectrolyte modified bentonite as adsorbent studied anionic dye acid scarlet acid 湖蓝 and the isatin and its mixed solution discoloration, 100μmol / L under the conditions in the initial concentration of each dye was added PDADMA modified bentonite were 0.42, 0.68 and 0.75 g / L, acid red, acidic sky blue and indigo red decolorization rate reached more than 95%. In the single dye adsorption system, each dye adsorption isotherms are Langmuir adsorption model, adsorption constants were 4.31 × 106,0.372 × 106 and 0.629 × 106 L / mol, and the maximum adsorption capacity of 228.7,176.3 and 149.2μmol / g. The mixed adsorption system each dye adsorption isotherms meets extended Langmuir adsorption model, the relationship between the sum and the sum of the equilibrium concentration of the dye adsorption amount Langmuir adsorption model. The study results showed that the adsorption kinetics, dye adsorption kinetics of single-component and mixed systems dynamics process in line with the second-order kinetics model. Chapter cloud point extraction for simulated dye wastewater decolorization study. Established phenomenon based on the cloud point of the surfactant cloud point extraction is a green extraction method. This selection of the non-ionic surfactant TX-114 cloud point extraction agent constituted by acid scarlet, reactive violet and eosin unit and mixed dye analog colored wastewater decolorization process was extracted, the surfactant concentration, dye concentration salt concentration, the equilibrium temperature, equilibrium time, and other factors affect the extraction efficiency. The results show that increasing the concentration of the surface active agent, salt concentration conducive to improve the extraction efficiency, and the dye concentration increases the extraction efficiency decreased slightly. The unit constituted by reactive violet, acid red and eosin and diverse mixed dye system, the the acid scarlet extraction efficiency significantly more reactive violet decolorization behavior of the extraction of the mixed dye system with single dye extraction decolorization behavior of the system is less. Chapter V CPC and bisphenol A exist sorb. Bentonite as an adsorbent has been widely used in the preliminary processing of organic matter in the wastewater, but bentonite adsorption properties of some organic is not very good, such as bisphenol-A. But under the existing conditions of the cationic surfactant, the amount of adsorption of bentonite on bisphenol A is far greater than the amount of adsorption of the surface active agent is present, the concentration of the cationic surfactant in the solution was adsorbed on bentonite bisphenol A process the impact. CPC concentration of 600mg / l, the experimental conditions, the removal efficiency of bisphenol A reaches a maximum of 95% bentonite adsorption isotherms of bisphenol A Langmuir adsorption model, the adsorption kinetics of the process in line with the second-order kinetics reaction process. The pH of the solution and the ion concentration affect the removal rates of the CPC and of bisphenol A, but little impact. In short, the conditions for the existence of the cationic surfactant CPC, the adsorption effect of the bentonite on bisphenol A good.

Related Dissertations

  1. Study on Characteristics of Contiuous Fiber-Reinforced Metal Matrix Composites under Hypervelocity Projectile Impact,TB332
  2. Modeling Analysis and Slip Estimation for Lunar Rovers,TP242
  3. Reaserch on Dynamics for Fast Walking of Biped Robot,TP242.6
  4. Analysis and Control of 6-DOF Electrical Driven Parallel Manipulator,TP242.2
  5. The Drying of Tilapia Fillet Using Supercritical Carbon Dioxide,TS254.4
  6. Influence of Nanostructure on Hydrophobic Properties at TiO2 Surface Studied by Molecular Dynamics Simulation,O614.411
  7. Hydrophilic structure of different types of surface -modified polyurethane material and coagulation 12 factor nine peptide fragments,and fibrinogen P1 fragment of computer simulation of the interaction,O631.3
  8. The Dynamic Performance Analysis of Oil Pumping Center and Structural Optimization of Improvement,TE933.1
  9. Influence of Nitrate Concentrations on the Production of N2, N2O, NO, and CO2 by Soil Cores During Anaerobic Incubation,X131.3
  10. The Research of Emergent Dispose for Organic Liquid Spills by Modified Bentonites,X703
  11. Research on Key Technology of Recycling Horizontal Subsea Pipe Conector,TE973
  12. Traumatic Brain Injury Patients with White Blood Cells in Peripheral Blood CD34~+ Cells and Content Changes,R651.1
  13. Alpine Meadow nitrogen mineralization and microbial Mechanism,S812
  14. Non- rigid body system kinematics and dynamics of the collision point,O313.3
  15. Magnetic field spin chain entanglement dynamics of particles in both,O413.1
  16. N-heptane HCCI combustion process temperature thermodynamics and kinetics theory,O643.21
  17. Molecular Dynamics Simulations of Temperature Effects on Pt/Au Heteroepitaxial Growth,O484.1
  18. The Nonlinear Optical Properties of Fuorenyl-based Chromophores,O437
  19. System Simulation of the Policy Design and Efficiency for the Water Ecology Carrying Capacity,X171
  20. Dynamic Analysis and Optimization of Six-bar Beating-up Mechanism of an Air-jet Loom,TS103.33
  21. Simulation Analysis and Improvement of Car Ride Based on Virtual Prototype,U461.4

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