Decomposition and decoloration of a direct dye by electron beam radiation

Vahdat, Ali; Bahrami, S. Hajir; Arami, Mokhtar; Motahari, Ahmad

doi:10.1016/j.radphyschem.2009.08.012

Cited by 40 publications

(13 citation statements)

References 21 publications

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“…Opening of the hydroxylated aromatic ring formed upon the addition of the HO· radical and formation of lower molecular weight organic compounds, including organic acidic species, are common steps during degradation of contaminants containing aromatic groups (Silva et al, 2016). The decrease in pH with increasing dose has been previously reported for treating dye-contaminated wastewater exposed to electron beam (Vahdat et al, 2010).…”

Section: Figurementioning

confidence: 95%

Electron beam irradiation of pharmaceuticals aiming at toxicity reduction: a binary mixture of fluoxetine and propranolol

Boiani¹,

Silva

Garcia

et al. 2024

Ecotoxicol. Environ. Contam.

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Significant evidence is available in the literature justifying the search for treatment technologies or process combinations to improve the decomposition of dozens of pharmaceuticals in wastewater. Conventional processing techniques are insufficient in removal of the pharmaceuticals, for having resistant waste and low biodegradability. Electron beam irradiation (EBI) may play an important role in this context, and relatively low doses have been reported for such purposes. The objective of this study was to apply the process of irradiation with electron beam in order to reduce the toxic effects of fluoxetine, propranolol, and a binary mixture of these pharmaceuticals in aqueous solution. Ecotoxicological tests conducted in two model organisms, Daphnia similis microcrustacean, and Vibrio fischeri bacterium. It was observed that D. similis was more sensitive to the pharmaceuticals and binary mixture, when compared to V. fischeri. When EBI was applied, all doses showed significant reduction of toxicity for D. similis, and the opposite for V. fischeri, when only 5.0 kGy showed a significant reduced of toxicity for the pharmaceuticals and binary mixture. 5.0 kGy was the best removal efficiency for toxicity, approximately 80% for D. similis and 20% for V. fischeri.

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Section: Figurementioning

confidence: 95%

Electron beam irradiation of pharmaceuticals aiming at toxicity reduction: a binary mixture of fluoxetine and propranolol

Boiani¹,

Silva

Garcia

et al. 2024

Ecotoxicol. Environ. Contam.

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show abstract

“…These active radicals take part in decomposition of macromolecules of pollutants into less harmful and smaller substances [13][14]. Fenton process, sonolysis, ozonation process, radiation-induced degradation, biodegradation and heterogeneous photo catalysis are techniques which are employed in the AOP approach [15][16][17][18][19]. The heterogeneous photo catalysis, which can be used for degradation of organic pollutants by initiation of redox transformations, has been proved as an efficient tool for degradation of aqueous as well as atmospheric organic pollutants.…”

Section: Photo Catalytic Degradationmentioning

confidence: 99%

Catalytic Degradation of Organic Dyes in Aqueous Medium

Saeed¹,

Usman²

2018

Photochemistry and Photophysics - Fundamentals to Applications

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Water pollution by the textile industry is an emerging issue. Textile industry is the major industrial sector which contributes to water pollution. Textile industry releases a huge amount of unfixed dyes in wastewater effluents. About 20% of the dye production all over the world is discharged as waste in industrial effluents by textile industry. These dyes are highly stable and colored substances which disturb the aqueous ecosystem significantly. Therefore, there is a need for methods to remove organic dyes from textile industrial effluents. Photo catalysis and catalytic wet oxidation are best practices for degradation of dyes in wastewater. In photo catalysis, the dye molecules can be completely degraded into inorganic non-toxic compounds by irradiation of the dye solution under visible or ultraviolet light in the presence of semiconductor metal-oxide photo catalysts. In catalytic wet oxidation, various metal-based catalysts in supported or unsupported form can be used as heterogeneous catalysts for degradation of dyes in the presence of oxygen or hydrogen peroxide. These processes have several preferences like easy separation of the catalyst from reaction mixture and recycling of the catalyst.

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“…Amin (2010) The electron beam irradiation demonstrated to be effective in decomposing the molecules of a direct dye in aqueous solution, but higher absorbed dose was necessary to achieve complete degradation to inorganic forms (Vahdat et al, 2010).…”

Section: Physico-chemical Processesmentioning

confidence: 99%

Textiles

Chiavola¹

2011

Water Environment Research

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A review of the literature published in 2010 on topics relating to the treatment alternatives for wastewater from the textile industries is presented. This paper is divided into the following sections: some general reviews of the processes removing organic dyes and of the toxicity of textiles, followed by the more promising treatment technologies distinguished into physicochemical, biological and combined processes

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Decomposition and decoloration of a direct dye by electron beam radiation

Cited by 40 publications

References 21 publications

Electron beam irradiation of pharmaceuticals aiming at toxicity reduction: a binary mixture of fluoxetine and propranolol

Electron beam irradiation of pharmaceuticals aiming at toxicity reduction: a binary mixture of fluoxetine and propranolol

Catalytic Degradation of Organic Dyes in Aqueous Medium

Textiles

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