Dissertation > Excellent graduate degree dissertation topics show

Polymer Materials Radiation Modification and Application in Surplus Sludge Treatment

Author: ChenQun
Tutor: WangYongHui
School: Donghua University
Course: Environmental Engineering
Keywords: Radiation graft Chemically modified Polymer materials Flocculant Heavy metal adsorbent
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 82
Quote: 0
Read: Download Dissertation

Abstract


In this thesis using 60Co_γ rays modification of polymer materials, polymer modified functional materials with flocculation and adsorption of heavy metals were synthesized. Key research and optimize the process conditions of radiation modification of polymer materials, and explore the synthesized flocculant flocculation of excess sludge dehydration, as well as heavy metal adsorbent removal of the aqueous solution and sludge Cu2 and Ni2 . The preirradiated prepared cellulose - acrylamide graft copolymer, pre-irradiation dose, reaction time, reaction temperature, the quality of raw materials and monomer ratio and polymerization inhibitor to add the amount of reaction conditions on the grafting reaction the impact. The results show that, 60Coγ pre-radiation triggered cellulose (MCC) and acrylamide (AM) graft copolymer, the optimal conditions as follows: reaction time 3h, the radiation dose 35kGy reaction temperature of 40 ° C, MCC and AM quality with than 0.5:1, inhibitor agent addition 0.01% AM, monomer concentration of 5%, the product of grafting rate and monomer can reach more than 65% utilization. By Mannich reaction of the polymerization product cationized Cationic cellulose - acrylamide flocculant (CCPAM), was prepared, its residual sludge flocculation dewatering effect, and were compared with the commercially available polyacrylamide (PAM). The results show that CCPAM better flocculation effect of excess sludge flocculation dehydration effect, under the present experimental conditions, PAM quite, and the optimal dosage is less than PAM. Total irradiation starch - acrylamide graft copolymer prepared by pre-irradiation dose, the quality of raw materials and monomer ratio and polymerization inhibitor added amount of graft reaction. The cationic graft product by Mannich reaction expedition dewatering properties of the sludge flocculation. The optimal synthesis conditions: radiation dose of 15kGy, starch AM mass ratio of 0.5:1, 5% of the added amount of polymerization inhibitor 0.02% AM, monomer concentration, product grafting rate of 244% monomer utilization rate of 171 %. The sludge flocculation dewatering performance experimental results show, CSPAM optimum dosage to 40mg / L, the sludge flocculation conditioning by CSPAM dehydration effect good. The pre-irradiation grafting method in high-density polyethylene (HDPE) powder grafting methyl acrylate the glyceride (GMA), explored the optimum conditions of the synthesis reaction. Methanol system, GMA was successfully grafted onto HDPE polymer the best graft reaction conditions: the irradiation dose 35kGy, the reaction temperature is 40 ℃, reaction time 4h, 1% of the polymerization inhibitor, the monomer concentration of 20%, GMA grafting rate of 332%. The products were further chemically modified with amine, prepared with the amine group of heavy metal adsorption material. Heavy metal ions Cu2 and Ni2 adsorption properties of the material of the aqueous phase, the results show that: the Cu2 and Ni2 adsorption at pH 6; Cu2 and Ni2 adsorption amount with the initial concentration increases, the maximum saturation The adsorption capacity of up to 162mg / g, 74mg / g; Cu2 and Ni2 adsorption kinetics are basically in line with the quasi-two kinetic model, and other adsorption isotherm model meets langmuir adsorption model. Explore the adsorption properties of the the amine adsorption materials on the sludge acidification of precipitation of heavy metals. The study shows that: the use of nitrate in the sludge acidification When adding 2g / L adsorbent and the acidification of the pH = 3, acidification time of 24h, the removal rate of 90.3% adsorbent for acid precipitation Cu2 precipitation of Ni2 removal efficiency up to 79.2%.

Related Dissertations

  1. Preparation, Characterization and Application of Prussian Blue Composite Nanomaterials,TB383.1
  2. Experimental Research of Chemically Modified Silicate for Mercury Removal from Flue Gas,X773
  3. Functional Materials Modified Electrode and Its Application,TB34
  4. Stability of Recombinant Enzyme Preparation of α-CGTase,Q814
  5. Iron -modified poly composite flocculant PFDMS Synthesis and flocculation performance,X703.5
  6. Preparation of modified corn cob on Pd (Ⅱ) adsorption properties of,X703
  7. Flocculation and Filter Experiment of Effluent from T6 Tube,X703
  8. Evaluation on Heavy Metal Contamination in Some Typical Mine Zone Soils in Hunan Province and Research on Chemical Amelioration of Heavy Metal Contaminated Soils and Soybean Planting,X53
  9. Preparation and Application of Modified Chitosan Magnetic Microscopic Particles,O636.1
  10. Preparation of Hydrophobically Modified PAM by Irradiation Grafting,O631.3
  11. Construction of Functional Membrane Electrodes Based on Nano-Interface and the Applications,O657.1
  12. Studies on the Determination of Bisphenol A as Well as on the Simultaneous Determination of AA, UA and XA Using Nano-mesoporous Silica Modified Carbon Paste Electrode,O657.1
  13. Study on Augmentation Treatment of Domestic Sewage by Bioflocculant-producing Microbes,X703
  14. Research on the Treatment of Gas Slime Wastewater in QidaShan Iron Mine,X703
  15. Application of Flocculation Precipitation Process on the Water Treatment Project in Haixin River,X52
  16. Application of Flocculants in the Treatment of Lees from Grape Wine,TS262.6
  17. The Effect of Ultrasound on the Properties and Conformation of Alliinase,O629.8
  18. Preparation and Evaluation of P-methylphenyl Bonded Monolithic Silica Column,O657.7
  19. Fluorgypsum masonry and plaster works in the Applied Research,TU526
  20. Research on Effects of Microbial Flocculant on the Growth of Chlorella Pyrenoidosa,TU991.2
  21. Microbial Flocculants Efficient Bacterium Screening, Cultivation Condition Optimization and the Application in Wastewater,X172

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