Photocatalytic decomposition of direct red 16 and kinetics analysis in a conic body packed bed reactor with nanostructure titania coated Raschig rings

Saien, Javad; Asgari, M.; Soleymani, Ali Reza; Taghavinia, Nima

doi:10.1016/j.cej.2009.03.011

Cited by 77 publications

(39 citation statements)

References 31 publications

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“…The rate constant then remained constant and independent of the dye concentration as the initial dye concentration increased to greater than 50 mg L −1 . This is typical Langmuir-Hinshelwood (L-H) reaction kinetics which is generally capable of modeling UV/ZnO photocatalytic oxidation process [27][28][29][30]. According to the L-H reaction kinetics, the rate of dye degradation can be described by the following equation:…”

Section: Effect Of Dye Initial Concentrationmentioning

confidence: 99%

Supported Zinc Oxide Photocatalyst for Decolorization and Mineralization of Orange G Dye Wastewater under UV365 Irradiation

Chang

Shu

Tseng

et al. 2013

International Journal of Photoenergy

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To solve the environmental challenge of textile wastewater, a UV/ZnO photocatalytic system was proposed. The objective of this study was to prepare a photocatalytic system by utilizing both cold cathode fluorescent light (CCFL) UV irradiation and steel mesh supported ZnO nanoparticles in a closed reactor for the degradation of azo dye C.I. Orange G (OG). Various operating parameters such as reaction time, preparation temperature, mixing speed, ZnO dosage, UV intensity, pH, initial dye concentration, and service duration were studied. Results presented efficient color and total organic carbon (TOC) removal of the OG azo dye by the designed photocatalytic system. The optimal ZnO dosage for color removal was 60 g m −2 . An alkaline pH of 11.0 was sufficient for photocatalytic decolorization and mineralization. The rate of color removal decreased with the increase in the initial dye concentration. However, the rate of color removal increased with the increase in the UV intensity. The steel mesh supported ZnO can be used repeatedly over 10 times without losing the color removal efficiency for 120 min reaction time. Results of Fourier transform infrared (FTIR) and ion chromatography (IC) indicated the breakage of N=N bonds and formation of sulfate, nitrate, and nitrite as the major and minor products. The observation indicated degradation of dye molecules.

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Section: Effect Of Dye Initial Concentrationmentioning

confidence: 99%

Supported Zinc Oxide Photocatalyst for Decolorization and Mineralization of Orange G Dye Wastewater under UV365 Irradiation

Chang

Shu

Tseng

et al. 2013

International Journal of Photoenergy

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“…The waste water generally consists of dye stuff that is hardly degraded. Among these stuffs, Direct Blue 71 (DB71) is considered as the most toxic and hardest degraded (Boumaza et al, 2014;Bulut et al, 2007;Saien et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Synthesized of Double Layer Thin Film ZnO/ZnO:Ag by Sol-Gel Method for Direct Blue 71 Photodegradation

Sutanto¹,

Wibowo

Hidayanto

et al. 2015

REAKTOR

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“…Temperature helps the degradation reaction to compete more effectively according to the Arrhenius equation; however, at the same time, it reduces the oxygen solubility in water which is not desirable [44].…”

Section: Effect Of the Initial Phmentioning

confidence: 99%

Photochemical oxidation of methyldiethanolamine (MDEA) in aqueous solution by UV/K2S2O8 process

2016

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Methyldiethanolamine (MDEA) as an organic material is a hazardous contaminant in the aquatic environment because of its adverse effects on aquatic life, environment, and humans. In this study, a batch reactor of ultraviolet (UV) light and peroxydisulfate was performed to investigate the degradation of MDEA in aqueous media. The effect of different experimental parameters such as UV irradiation, peroxydisulfate concentration, MDEA concentration, temperature, and solution pH on removal of MDEA was evaluated precisely. No significant degradation was observed with a separate UV light. Adding peroxydisulfate to the solution increased the removal performance more than 75 %.

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Photocatalytic decomposition of direct red 16 and kinetics analysis in a conic body packed bed reactor with nanostructure titania coated Raschig rings

Cited by 77 publications

References 31 publications

Supported Zinc Oxide Photocatalyst for Decolorization and Mineralization of Orange G Dye Wastewater under UV365 Irradiation

Supported Zinc Oxide Photocatalyst for Decolorization and Mineralization of Orange G Dye Wastewater under UV365 Irradiation

Synthesized of Double Layer Thin Film ZnO/ZnO:Ag by Sol-Gel Method for Direct Blue 71 Photodegradation

Photochemical oxidation of methyldiethanolamine (MDEA) in aqueous solution by UV/K2S2O8 process

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