Effect of gamma irradiation on pulp and paper mill effluents
The effect of gamma irradiation on lignin was studied under various irradiation conditions, such as concentration of pollutant, pH of effluents, amount of iron, alcohols, acetic acid and peroxides in effluent, and application of air bubbling. The efficiency of gamma irradiation is most remarkably influenced by the application of air bubbling. For the radiolytic degradation of the aromatic nucleus in the lignin molecule, application of this method is considered to be indispensable. Addition of a small amount of alcohols, sodium acetate, and peroxides accelerates the radiolytic brightening of lignin. On the other hand, a small amount of iron has a remarkably detrimental effect. The efficiency of gamma irradiation on pulp and paper mill effluents was also studied by the use of four kinds of kraft mill effluents, such as screen washing effluent, chlorine stage effluent, caustic extraction stage effluent, and total effluents.
- Research Organization:
- Tokyo Univ.
- OSTI ID:
- 7142477
- Journal Information:
- Appl. Polym. Symp.; (United States), Journal Name: Appl. Polym. Symp.; (United States) Vol. 28; ISSN APPSB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
CARBOHYDRATES
CHEMICAL RADIATION EFFECTS
CHEMISTRY
DISPERSIONS
ECONOMICS
EFFICIENCY
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
INDUSTRIAL PLANTS
IONIZING RADIATIONS
LIGNIN
LIQUID WASTES
MATRIX ELEMENTS
MIXTURES
ORGANIC COMPOUNDS
PAPER
PH VALUE
POLYSACCHARIDES
QUANTITY RATIO
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SACCHARIDES
SLURRIES
SUSPENSIONS
WASTES