Irradiation treatment of azo dye containing wastewater: An overview

Wojnárovits, László; Takács, Erzsébet

doi:10.1016/j.radphyschem.2007.05.003

Cited by 180 publications

(68 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As a result, decolorization yields for aqueous solutions of soluble organic dyes, as a rule, are equal to 0.1-0.3 μmol/J, depending on the structure of dye (for disperse dyes, which are water-insoluble and form aqueous dispersions, the yield is lower because of impediments to radical penetration into dye particulates) [37,38]. The yield of decolorization decreases with increasing absorbed dose, since the rate constants of radicals' reactions with original dye molecules and with the products of dye d e g r a d a t i o na r eo ft h es a m eo r d e r ;s ow h i l et h ec oncentration of the latter increases during irradiation, the fraction of radicals being spent in reactions with those products also increases, reducing thereby the fraction of radicals required for "decolorization" of the original dye molecules.…”

Section: Handmentioning

confidence: 99%

Radiation-Induced Degradation of Organic Compounds and Radiation Technologies for Purification of Aqueous Systems

Makarov¹,

Пономарев²

2018

Ionizing Radiation Effects and Applications

View full text Add to dashboard Cite

Environmental application of radiation technologies is an important part of radiation processing. Radiation treatment of aqueous systems contaminated with organic compounds is a promising method of water and wastewater purification and corresponding technologies are being developed. In this chapter, the following aspects of radiation treatment process are considered: sources of contamination and major contaminants of water and wastewater; primary processes in aqueous systems initiated by ionizing radiation; principal ways of contaminant conversion as consequences of primary processes (complete mineralization of organic compounds, partial decomposition of organic molecules resulted in detoxification, decolorization, disinfection of polluted water, and improvement in biological degradation of contaminant, polymerization of monomers' contaminants, oxidation-reduction processes, and coagulation of colloids); sources of ionizing radiation; and main equipment applied in radiation technologies of aqueous system purification.

show abstract

Section: Handmentioning

confidence: 99%

Radiation-Induced Degradation of Organic Compounds and Radiation Technologies for Purification of Aqueous Systems

Makarov¹,

Пономарев²

2018

Ionizing Radiation Effects and Applications

View full text Add to dashboard Cite

show abstract

“…Photolysis is a process that uses radiation with ultraviolet (UV) light to generate such reactive species as radicals, ions, and excited molecules [3,4].…”

Section: Photodegradationmentioning

confidence: 99%

Simultaneous Determination of Organic Dyes Using Second-Order Data

Callao

Larrechi

2015

Data Handling in Science and Technology

View full text Add to dashboard Cite

“…7) result from the • OH addition to the aromatic ring in the dye molecule. This is due to the fact that cyclohexadienyl and naphthoxyl-type radicals show typical absorbance bands in the wavelengths between 300 and 400 nm [35,38].…”

Section: Radiolysismentioning

confidence: 99%

Electrochemical discolouration and degradation of reactive dichlorotriazine dyes: reaction pathways

et al. 2010

View full text Add to dashboard Cite

Results of electrochemical oxidation of two reactive dichlorotriazine dyes: Reactive Red 2 and Reactive Blue 81, are presented in this paper. Two electrode materials: Ti/TiO 2 (70%)-RuO 2 (30%) and carbon felt, were applied in the investigations as anodes. Voltammetric measurements show that Reactive Blue 81 electrooxidation proceeds easier and with higher rate than electrooxidation of Reactive Red 2. Both dyes are oxidised irreversibly in at least one electrode step before oxygen evolution starts at the electrode. Effectiveness of electrochemical oxidation under potentiostatic conditions achieved for Reactive Blue 81 was higher than for Reactive Red 2, with application of a carbon felt anode. Pulse radiolysis measurements prove addition of • OH radical to the dye molecule and formation of cyclohexadienyl and naphthoxyl radicals. Results of voltammetric analysis, pulse radiolysis measurements and GC-MS identification of intermediate products suggest two possible pathways of the dyes electrochemical oxidation.

show abstract

Irradiation treatment of azo dye containing wastewater: An overview

Cited by 180 publications

References 70 publications

Radiation-Induced Degradation of Organic Compounds and Radiation Technologies for Purification of Aqueous Systems

Radiation-Induced Degradation of Organic Compounds and Radiation Technologies for Purification of Aqueous Systems

Simultaneous Determination of Organic Dyes Using Second-Order Data

Electrochemical discolouration and degradation of reactive dichlorotriazine dyes: reaction pathways

Contact Info

Product

Resources

About