Enhancement of the bleaching and degradation of textile wastewaters by Gliding arc discharge plasma in the presence of TiO2 catalyst

Ghezzar, Mouffok Rédouane; Abdelmalek, Fatiha; Belhadj, Mohamed; Benderdouche, N.; Addou, A.

doi:10.1016/j.jhazmat.2008.09.060

Cited by 101 publications

(60 citation statements)

References 35 publications

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“…8 for the two dyes (ARS and OG), each containing a sulfur atom. The formation of sulfate ions is due to sulfonate groups oxidation by hydroxyl radicals Å OH (Ghezzar et al, 2007) according to reactions (15) and (16):…”

Section: Evolution Of Sulfate Ions (Mineralization)mentioning

confidence: 99%

Plasma treatment by gliding arc discharge of dyes/dye mixtures in the presence of inorganic salts

Merouani

Abdelmalek

Taleb

et al. 2015

Arabian Journal of Chemistry

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The gliding arc discharge plasma (GAD) technique was used for discoloration and degradation of an anthraquinone dye Alizarin red S (ARS), an azo dye Orange G (OG) and their mixture. The influence of chloride and sulfate salts on the efficiency of treatment has also been studied. The aim of this study is the discoloration and degradation by GAD of ARS, and OG and their mixture.The GAD plasma generated between two moist air metallic electrodes connected to a high voltage produced chemical species and highly reactive molecules Å OH, NO Å , O Å , O 2 , HO 2 Å , H Å , H 2 O 2 , O 3 . . . and other excited-state neutral molecules. The reactions of discoloration for ARS and OG followed pseudo-first-order kinetics. The apparent kinetic constants of bleaching were found equal to 0.014 and 0.013 min À1 and degradation of 0.008 and 0.010 min À1 , respectively for the ARS and OG. For mixtures, the rate of discoloration was 80% in 120 min of treatment for mixtures III, IV and V, while the rate of COD reduction was fast in the first 30 min since it varied between 35% and 40% for all mixtures but stabilized at 68% toward the end of the treatment. The addition of chloride salts and sulfate showed a decrease in the effectiveness of treatment.

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Section: Evolution Of Sulfate Ions (Mineralization)mentioning

confidence: 99%

Plasma treatment by gliding arc discharge of dyes/dye mixtures in the presence of inorganic salts

Merouani

Abdelmalek

Taleb

et al. 2015

Arabian Journal of Chemistry

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“…Decolourization of dye solution is due to the destruction of chromospheres characterized by k max (484 mm) while degradation concerns bond breaking in the aromatic part of dye (C-C, C-N, C=C, et al) [41]. So the degradation of AO7 in terms of COD removal was investigated.…”

Section: Study Of Cod Removalmentioning

confidence: 99%

Degradation of Acid Orange 7 by Gliding Arc Discharge Plasma in Combination with Advanced Fenton Catalysis

Zhang

Wang

et al. 2010

Plasma Chem Plasma Process

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A new plasma-catalysis process of gliding arc discharge (GAD) plasma with zero-valent iron (ZVI) was examined. Because GAD plasma creates an acidic environment, solid iron releases ferrous ions which act as a catalyst for the decomposition of the hydrogen peroxide. A comparative study of the catalytic effects between Fe 2? and Fe 0 in GAD plasma was investigated. The decolorization reactions of Acid Orange 7 (AO7) followed pseudo-first-order kinetics. And the rate constants for the process of GAD with ZVI was increased by 30% and by 19%, respectively, compared with the process of GAD alone and the process of GAD with ferrous. The investigations of solution pH and hydrogen peroxide both demonstrated that the GAD plasma induced conditions are much suitable for advanced Fenton reactions. The corrosion of ZVI in GAD plasma can give continuous ferrous ions to sustain Fenton reaction. Also, ZVI was demonstrated to have favorable reusable feature.

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“…Parameters acting on plasma efficiency involved the nozzle diameter of plasma gas (Ф), the inter-electrode distance (e), the nature of the plasma gas, the electrode-film distance (d) and the gas flow rate (Q) and are relevant to all GAD devices at present [13,14]. They were subject to optimization in previous works [14][15][16][17][18][19][20] and have been maintained constant in this work.…”

Section: Falling Film Gad (Gad-ff)mentioning

confidence: 99%

“…These devices are characterized by appropriate electrical power supply modes. Among the most utilized techniques, there are (i) the electron beams reactors [5][6][7]; (ii) the corona discharges [8][9][10]; (iii) the dielectric barrier discharges (DBD) [11,12]; and (iv) the gliding arc discharges (GAD) [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…The GAD, i.e., a technique that operates close to ambient temperature and atmospheric pressure, has been successfully applied to the degradation of liquid solutes [14][15][16][17][18][19][20] for pollution abatement and for surface treatment in order to obtain high corrosion protection (for example for steels) [21,22]. At first, the previous GAD reactor configuration involved an open cell (GAD I).…”

Section: Introductionmentioning

confidence: 99%

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New prototype for the treatment of falling film liquid effluents by gliding arc discharge part I: Application to the discoloration and degradation of anthraquinonic Acid Green 25

Ghezzar

Saïm

Belhachemi

et al. 2013

Chemical Engineering and Processing: Process Intensification

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Enhancement of the bleaching and degradation of textile wastewaters by Gliding arc discharge plasma in the presence of TiO2 catalyst

Cited by 101 publications

References 35 publications

Plasma treatment by gliding arc discharge of dyes/dye mixtures in the presence of inorganic salts

Plasma treatment by gliding arc discharge of dyes/dye mixtures in the presence of inorganic salts

Degradation of Acid Orange 7 by Gliding Arc Discharge Plasma in Combination with Advanced Fenton Catalysis

New prototype for the treatment of falling film liquid effluents by gliding arc discharge part I: Application to the discoloration and degradation of anthraquinonic Acid Green 25

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