Dissertation > Excellent graduate degree dissertation topics show

Synthesis and flocculation properties of formaldehyde and glyoxal graft polyacrylamide polymers

Author: LiZuo
Tutor: XieYueSheng
School: Guangxi Normal University
Course: Organic Chemistry
Keywords: organic flocculants acrylamide formaldehy glyoxal ployacrylamide graft polymerization reaction
CLC: X703
Type: Master's thesis
Year: 2010
Downloads: 109
Quote: 0
Read: Download Dissertation

Abstract


This paper summarizes the water purification process, which includes the flocculation of solid impurities, wastewater decolorization, the methods of organic toxins and heavy metals removal in wastewater, the modification of polyacrylamide. The discuss is about, under the microwave conditions, a series of NPAM with different molecular weight were prepared as water solution by oxidation and reduction initiatin gsystem. In order to get the best technical conditions,the effects of some factors on molecular weight are studied such as the amount of initiator,consisteney of the reactant, time of reaction and pH. Respectively the use of formaldehyde, glyoxal and other simple organic aldehyde as the raw material by the initiator react graft polymerization with ployacrylamide, and formaldehy-ployacrylamide, glyoxal-ployacrylamide were synthesized by infrared spectrum confirmed. The quality of product analysis and chemical analysis of the remaining raw materials are that the excessive use of low molecular weight aldehydes, there is a large number of monomer residues will bring secondary pollution in the environment.With the best ratio of raw materials,the molecular weight of ployacrylamide is 1.71×106, the molecular weight of formaldehy-ployacrylamide is 4.03×107, and the molecular weight of glyoxal-ployacrylamide is 4.22×107. Flocculation test testifies that the effects of NPAM and formaldehyde-ployacrylamide are equal to polyacrylamide which is saled in the market, while the effect of flocculation water purification of glyoxal-ployacrylamide slightly is better than the polyacrylamide which is saled in the market. Specially in the alkaline wastewater, it is better than other conditions that is the effect of flocculation water purification of glyoxal-ployacrylamide.

Related Dissertations

  1. Synthesis and Application of A Novel Series of Cation Hydrophobically Modified Polyacrylamide,TQ323.6
  2. Acrylic acid - acrylamide superabsorbent properties of high-powered,TQ324.8
  3. Isolation of Highly Purified Cellulose from Wheat Straw and Its Application,X712
  4. Design, Synthesis and Application of Fluorescent Sensing Materials Based on Naphthalimide,TP212.2
  5. Preparation and Performance of the Membrane of GMA Copolymer and Gelatin,TQ320.721
  6. Reseach of Temperature Sensitive Nanogels with Tuned Temperature Sensitivity,TB383.1
  7. Study of the Intervention Effect of Melatonin on ACR-Induced Neurobehavioral Damage in Rats,R114
  8. Intervention of Melatonin for Acrylamide-induced General Toxicity and Neurotoxicity in Rats,R114
  9. Acrylamide Copolymers and Application,TQ323.6
  10. Containing silver nanoparticles temperature stimuli-responsive hybrid nano- hydrogels,TB383.1
  11. SMPU / PNIPAM semi-interpenetrating polymer networks thermo-sensitive permeable membranes,O631.3
  12. Containing silver nanoparticles pH stimuli-responsive nanocomposite hydrogels,TB383.1
  13. Research on Safety of Wastewater Reuse in Municipal Water Treatment Plants,X703
  14. Preparation of a New Type of Hybrid Silica Composite Microspheres,O613.72
  15. Inverse emulsion prepared by the star P (AM-DMDAAC) flocculant and its application,X703.5
  16. Konjac Glucomannan/Acrylamide Modification Film in the Research and Application of LuGan Preservation,TS255.3
  17. Preparation of a Water Vapor Permeability Controllable Shape Memory Polymer and Its Application on Fabrics,TS195.2
  18. The composite hydrogel the PNIPA/Fe_3O_4 irradiation Preparation and Characterization,TB332
  19. Study on New Flocculants by Inverse Emulsion Polymerization and Its Performance,TQ314.24
  20. New Synthetic organic polymer flocculant,TQ316.33
  21. The Preparation and Property of LPAAM Superabsorbent Composite,TQ324.8

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