High-energy irradiation treatment of aqueous solutions of azo dyes: steady-state gamma radiolysis experiments

Şolpan, Dilek; Güven, Olgun; Takács, Erzsébet; Wojnárovits, László; Dajka, Katalin

doi:10.1016/s0969-806x(03)00100-2

Cited by 37 publications

(10 citation statements)

References 11 publications

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“…The final degradation products of the irradiated dye solution can be further investigated using additional analytical tools such as HPLC [45], FTIR [46], GC/MS [47] and NMR [48], etc.…”

Section: Experimental Techniques Used For Studying Dye Degradationmentioning

confidence: 99%

“…Increasing the hydrogen peroxide concentration above 1.2 mM resulted in a decrease in the degree of degradation, probably due to the scavenging of • OH radicals by the excess hydrogen peroxide. The radiation induced degradation and decoloration of three textile dyes namely, Janus Green B (JGB), Reactive Black 5 (RB5) and Apollofix Red (AR) have also been studied as a function of gamma irradiation dose and dose rate [46]. In all the three cases the G value strongly decreased with the decreasing dose.…”

Section: Steady State Radiolysismentioning

confidence: 99%

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Radiation induced degradation of dyes—An overview

Rauf

Ashraf

2009

Journal of Hazardous Materials

247

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“…The final degradation products of the irradiated dye solution can be further investigated using additional analytical tools such as HPLC [45], FTIR [46], GC/MS [47] and NMR [48], etc.…”

Section: Experimental Techniques Used For Studying Dye Degradationmentioning

confidence: 99%

Section: Steady State Radiolysismentioning

confidence: 99%

Radiation induced degradation of dyes—An overview

Rauf

Ashraf

2009

Journal of Hazardous Materials

247

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“…The effect of γ-radiation on colour intensity of aerated, oxygenated, N 2 , N 2 O saturated aqueous solution of dyes have also been reported 5,6 . Mansoori et al 7 have studied the photographic bleaching of Rhodamine-B (Rh-B) over the zinc powder in presence of light.…”

Section: Introductionmentioning

confidence: 94%

Gamma Radiolysis Studies of Aqueous Solution of Brilliant Green Dye

Parwate

Mankar

2010

Journal of Chemistry

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The effect of γ–radiation on colour intensity of aqueous solution of Brilliant Green has been investigated at two different concentrations. The degradation of Brilliant Green (BG) has also been investigated in presence of suspended ZnO, by adding different amounts of ZnO. Simultaneously the conductance and pH of each solution system were measured before and after γ-irradiation. All the γ–irradiations were performed at a dose rate of 0.60 kGyhr-1in GC-900. The maximum dose required for the complete degradation of the dye was found to be 0.39 kGy. G(-dye) values were found to decrease with increase in gamma dose and were in the range 4.26 - 12.81. The conductance (7.6 - 25.3 μS) and pH values increased marginally with dose for both the concentrations. The rate of decolouration was found to be high at lower doses and the efficiency of dye removal was higher at low concentration of the dye. This may be attributed to the presence of reaction by-products from the destruction of parent compound build up and compete for reaction intermediate species. The rate of reaction and rate constants were calculated and it was found that the degradation reaction follows first order kinetics. It was found that the decolouration percentage was more in dye systems in absence of ZnO.

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“…BOD 5 / COD ratio is important for the remediation of such colored contaminants since a high value corresponds that conventional methods is not enough for the removal of such structures [80,81]. The most important criteria for the use of textile dyes are their stability to light and microbial attack [82]. Textile dyes in wastewater are non-biodegradable [83,84] and they cause huge problems for living organisms because of high toxicity and stable structure.…”

Section: Textile Dyesmentioning

confidence: 99%