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Decolorization Kinetics of Sludge Protein Solution by 60Co γ-Ray Irradiation/H2O2 Oxidation*(PDF)

Transactions of Tianjin University[ISSN:1006-4982/CN:12-1248/T]

Issue:
2011年01期
Page:
45-50
Publishing date:

Info

Title:
Decolorization Kinetics of Sludge Protein Solution by 60Co γ-Ray Irradiation/H2O2 Oxidation*
Author(s):
XIANG YulinZHANG WeijiangZHENG Hao
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Keywords:
DOI:

Abstract:
In order to carry out decolorization, sludge protein solution, a dark brown close to black solution from activated sludge, was subjected to 60Co γ-ray irradiation in the presence of hydrogen peroxide. UV/Vis spectropho- tometric method was used to investigate the effect of H2O2 on the coloration apparent kinetics and rate constants of sludge protein solution under γ-ray irradiation. In addition, the effects of irradiation dose, initial sludge protein solution concentration, and pH value on the decolorization efficiency of sludge protein solution were studied. Results showed that the decolorization apparent kinetics of sludge protein solution was a first-order reaction. The solution decoloriza- tion percentage increased with the increase of irradiation dose or the decrease of initial sludge protein solution concen- tration. The examination results of pH value showed that the sludge protein solution could be more efficiently decolor- ized in alkaline media than in acid media. Moreover, sensory evaluation and foamability analysis indicated that irradi- ated samples under H2O2 oxidation showed better sensory score and foamability.

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Last Update: 2011-04-07