Degradation of an azo dye Orange II using a gas phase dielectric barrier discharge reactor submerged in water

Mok, Young Sun; Jo, Jin Oh; Whitehead, J. Christopher

doi:10.1016/j.cej.2007.11.012

Cited by 131 publications

(63 citation statements)

References 28 publications

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“…For example, water treatment by ozone and UV from AC powered dielectric barrier discharges [29], have efficiency 20 times higher than the reference reactor. It improves to 400 times higher than the reference reactor when a thin layer of solution is treated with pulsed DC powered dielectric barrier discharges in air [31].…”

Section: Discussionmentioning

confidence: 99%

Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Malik

2009

Plasma Chem Plasma Process

350

177

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Decomposition of toxic organic compounds is a major environmental problem. Increasingly, research is being conducted to use plasmas to decompose these wastes in water, as it is simple, effective and does not require the addition of other chemical agents. Different groups have used varied reactor designs. This study calculates and compares relative energy yields of about 27 major types of plasma reactors. The results reveal dramatic differences in the energy yields, up to five orders of magnitude. The most efficient are pulse powered reactors, in which plasma is formed in gas phase and the waste solution sprayed into it. Factors that account for this improved energy yield are discussed. This study will help narrow down efficient reactors for further studies, development and commercial uses.

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Section: Discussionmentioning

confidence: 99%

Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Malik

2009

Plasma Chem Plasma Process

350

177

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“…They reported that the dye molecules decompose into organic acids, aldehydes, resulting in a decrease in pH values and an increase in water conductivity. Mok et al [3] also reported that the degradation products from Orange II using a gas phase dielectric barrier discharge reactor in water like organic acids could decrease the pH value and increase the solution conductivity.…”

Section: Resultsmentioning

confidence: 99%

Oxidative Decoloration of Dyes by Pulsed Discharge Plasma over a Water Surface under Argon Atmospheric

Diono

Machmudah

Nagafuchi

et al. 2013

Trans. Mat. Res. Soc. Japan

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Pulsed discharge plasma is typical oxidation technologies for disposing organic compounds in aqueous solutions. In this paper, electric field generated by pulsed highvoltage discharge plasma over water surface has been performed under argon atmosphere to degrade dye compounds. The effects of various parameters with pulsed highvoltage arc discharge plasma are studied for decoloration of Orange G, Orange II, Congo Red, Naphthol Blue Black. The experiments were conducted at 313 K and 0.2 MPa using a batch type reactor. Intermediate compounds from the degradation of dyes in the aqueous products were analyzed by UVVis (ultra violet visible) spectrophotometer. The dyes degradation increases with increasing peak pulse voltage applied which leads to the formation of its derived compounds. The decoloration rate significantly increased also with the number of pulse discharge plasma. When the number of discharge plasma was 20000x with 9 kV peak pulse voltage applied, the degradation of Orange G, Orange II, Congo Red, and Naphthol Blue Black could approach to 50.81 wt%, 41.64 wt%, 56.41 wt%, and 53.25 wt%, respectively.

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“…Endeavors to decay engineered colors by ozonation based strategies have risen amid the most recent decade and gave promising results. Mok (2008) and Njatawidjaja (2005) researched the decay of azo color Orange II (Acid Orange 7), Dojcinovic (2011) and Cheng (2007) worked with four azo colors: Reactive Black 5, Reactive Blue 52, Reactive Yellow 125 and Reactive Green 15. Chen (2004) and Gomes (2012) reported a fruitful debasement of azo color Acid Orange 7 and antra Quinone color Acid Green 27 under ozonation.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study for Degradation of Organic Dyes Using Dual pin‐to‐plate Corona Discharge Plasma reactors for Industrial Wastewater Treatment

El-Tayeb

El-Shazly

Elkady

et al. 2016

Contrib. Plasma Phys.

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This work researches the possibility of increasing the dye removal efficiency from wastewater using nonthermal plasma. A study for the optimal air gap distance between dual pin and surface of Acid Blue 25 dye solution and thickness of ground plate is carried out using 3D-EM simulator to find maximum electric field intensity at the tip of both pins. The consequences display that the best gap for corona discharge is approximately 5 mm using 15 kV source. In addition, the optimum plate thickness is 0.1 mm. These distance and thickness were mentioned are constant during the study of other factors. Dual pin-to-plate high-voltage corona discharge plasma system is presented to investigation experimentally the gap distance, thickness of ground plate, initial dye concentration, pH solution and conductivity on the amount of Acid Blue 25 dye color removal efficiency from wastewater. There is a large consensus among the simulation and experimental work in the air gap and thickness of ground plate. Where the decolorization for air gap 5 mm is 95.74 at time 35 min compared with 91% and 17% for 1 mm and 20 mm gap distance respectively. Also, the discharge energy at each air gap are calculated. Measurement results for the impact of thickness of an Aluminum ground plate on color removal competence showed color removal efficiencies of 86.3%, 90.78% and 98.06%, after treatment time 15 min for thicknesses of 2, 0.5 and 0.1 mm respectively. The decolorization behavior utilizing dual pin-toplate corona discharge plasma system display 82% pigment evacuation proficiency inside 11min. The complete decolorization was accomplished within 28min for distinctive examined introductory color focuses 5 ppm up to 100 ppm. Likewise, the impacts of conductivity by utilizing diverse salts as AlCl3, CaCl2, KCl and NaCl and with distinctive focuses have been explored. The rising of the solution conductivity leads to the reduction of decolorization efficiency. The decolorization efficiency and discharge energy are calculated at different concentration molarity for AlCl3, CaCl2, KCl and NaCl. It was observed that the presence of salts at the same concentration level substantially decreased the rate and the extent of decolorization. The results indicate that the optimum pH for the decolorization of Acid Blue 25 dye is in the range between 3 and 6. Furthermore the conductivity and discharge energy were measurement at each value of pH. Energy yield for decolorization and Electrical Energy per Order (EE/O) under different initial pH value were calculated. A kinetic model is used to define the performance of corona discharge system under different value of pH. The model of pseudo -zero, pseudo-first order, and pseudo-second order reactions kinetic are utilized to investigate the decolorization of Acid Blue 25 dye. The rate of degradation of Acid Blue 25 dye follows the pseudo-first order kinetics in the dye concentration. Energy consumption requirements for decolorization was considered. The outcomes will be useful for designing the plasma treatment systems ...

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Degradation of an azo dye Orange II using a gas phase dielectric barrier discharge reactor submerged in water

Cited by 131 publications

References 28 publications

Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Water Purification by Plasmas: Which Reactors are Most Energy Efficient?

Oxidative Decoloration of Dyes by Pulsed Discharge Plasma over a Water Surface under Argon Atmospheric

Simulation and Experimental Study for Degradation of Organic Dyes Using Dual pin‐to‐plate Corona Discharge Plasma reactors for Industrial Wastewater Treatment

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