Effects of operational parameters on the removal of brilliant green dye from aqueous solutions by electrocoagulation

Nandi, Barun Kumar; Patel, Shweta

doi:10.1016/j.arabjc.2013.11.032

Cited by 141 publications

(65 citation statements)

References 22 publications

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“…During the sorption, no toxic intermediates are formed, in contrast to the oxidation methods (ozonation, oxidation with NaOCl) [Wijannarong et al 2013]. Sorption also does not cause sediment formation or sewage salinity, like the precipitation methods do (coagulation and electrocoagulation) [Liang et al 2014, Nandi and Patel 2013].…”

Section: Introductionmentioning

confidence: 99%

The Use of Coconut Shells for the Removal of Dyes from Aqueous Solutions

Jóźwiak¹,

Filipkowska²,

Bugajska³

et al. 2018

J. Ecol. Eng.

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The main purpose of the work was to check the possibility of using coconut shells for the removal of the dyes popular in the textile industry from aqueous solutions. The sorption abilities of an unconventional sorbent were tested against four anionic dyes: Reactive Black 5, Reactive Yellow 84, Acid Yellow 23, Acid Red 18 as well as two cationic dyes: Basic Violet 10 and Basic Red 46. The scope of research included investigation pertaining to the effect of pH on the effectiveness of sorption of dyes, conducted in order to determine the time of equilibrium of sorption and determine the maximum sorption capacity of coconut shells with respect to pigments. The most favorable pH of sorption for the anionic dyes and Basic Violet 10 was pH 3 and for Basic Red 46 -pH 6. The equilibrium time of sorption was the shortest in the case of acidic dyes (Acid Yellow 23/ Acid Red 18 -45 min), while the longest in the case of alkaline dyes (Basic Red 46 -90 min, Basic Violet 10 -180 min). The sorption capacity of coconut shells in relation to anionic dyes was for Reactive Black 5 -0.82 mg/g, Reactive Yellow 84 -0.96 mg/g, Acid Yellow 23 -0.53 mg/g and for Acid Red 18 -0.66 mg/g. The tested sorbent showed much higher sorption capacity with respect to the cationic dyes, i.e. Basic Violet 10 (28.54 mg/g) and Basic Red 46 (68.52 mg/g).

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Section: Introductionmentioning

confidence: 99%

The Use of Coconut Shells for the Removal of Dyes from Aqueous Solutions

Jóźwiak¹,

Filipkowska²,

Bugajska³

et al. 2018

J. Ecol. Eng.

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“…At a lower inter electrode distance, the resistance encountered by the current flowing in the solution medium decreased, thereby, facilitated the electrolytic process resulting in enhanced dye removal. Nandi and Patel (2013) also observed that with weak inter electrode distance of 1 cm, there was maximum dye removal of 99.59, 89.98 and 76.14 % for three different current densities of 41.4, 27.8 and 13.9 A/m 2 , respectively.…”

Section: Effect Of Inter Electrode Distancementioning

confidence: 66%

Removal of nitrate and sulphate from biologically treated municipal wastewater by electrocoagulation

Sharma

Chopra

2015

Appl Water Sci

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The present investigation observed the effect of current density (j), electrocoagulation (EC) time, inter electrode distance, electrode area, initial pH and settling time on the removal of nitrate (NO 3 -) and sulphate (SO 4 2-) from biologically treated municipal wastewater (BTMW), and optimization of the operating conditions of the EC process. A glass chamber of two-liter volume was used for the experiments with DC power supply using two electrode plates of aluminum (Al-Al). The maximum removal of NO 3 -(63.21 %) and SO 4 2-(79.98 %) of BTMW was found with the optimum operating conditions: current density: 2.65 A/m 2 , EC time: 40 min, inter electrode distance: 0.5 cm, electrode area: 160 cm 2 , initial pH: 7.5 and settling time: 60 min. The EC brought down the concentration of NO 3 -within desirable limit of the Bureau of Indian Standard (BIS)/WHO for drinking water. Under optimal operating conditions, the operating cost was found to be 1.01$/m 3 of water in terms of the electrode consumption (23.71 9 10 -5 kg Al/m 3 ) and energy consumption (101.76 kWh/m 3 ).

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“…, in the present case) is enhanced facilitating higher rate of flocculation and hence the color removal rate [20,21]. However, on further raising current density above its optimum value, the advantage of enhanced ion formation or flocculation rate is counterbalanced by lowering of diffusion rate of flocculants due to enhanced inter-particle collision/hindrance.…”

Section: +mentioning

confidence: 81%

“…The lower rate of color removal below optimum pH may be due to the availability of fewer hydroxyl ( -OH) ions required for the formation of metal hydroxides flocculant. Further, on raising pH above the optimum value the color removal rate falls owing to diminishing positive charge at tertiary N of Malachite green molecules, minimizing its interaction with the metal ions released by anodic oxidation and hence the lower rate of flocculation [21,22].…”

Section: Effect Of Phmentioning

confidence: 99%

Removal of Malachite Green from Contaminated Water using Electro-Coagulation Technique

Getaye¹,

Hagos²,

Alemu³

et al. 2017

JAPLR

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Electro-coagulation analytical technique has been used for the removal of malachite green -a dyestuff used as antimicrobial in aquaculture. Effects of parameters such as current density, pH, dye initial concentration, interelectrode separation and amount of electrolyte on the dye color-removal have been investigated using Al and Fe as scarifying anodes. It was observed that whereas increase in dye initial concentration or inter-electrode separation, the rate of color removal continuously falls, however, on raising of electrolyte concentration, color removal rate enhances up to a definite electrolyte level, beyond that there was no further improvement in the color removal. Further, for achieving maximum color removal of malachite green aqueous solution optimum current density (76.5A/m 2 ) and pH (8.0) of solution, is required. Complete color removal of 100mg/L malachite green aqueous solution could be achieved in 30min using electrolyte (NaCl) concentration 0.4g/L, inter-electrode distance: 1cm and optimum pH and current density. Performance of Al and Fe as sacrificial electrodes, in terms of their color removal efficiency, was almost similar except in their response to inter-electrode separation, as variable, where in case of Fe as anode, color removal rate declined more rapidly. The outcome of the present research work may be useful for an effective large scale treatment of industrial effluents contaminated with malachite green dye. Keywords:

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Effects of operational parameters on the removal of brilliant green dye from aqueous solutions by electrocoagulation

Cited by 141 publications

References 22 publications

The Use of Coconut Shells for the Removal of Dyes from Aqueous Solutions

The Use of Coconut Shells for the Removal of Dyes from Aqueous Solutions

Removal of nitrate and sulphate from biologically treated municipal wastewater by electrocoagulation

Removal of Malachite Green from Contaminated Water using Electro-Coagulation Technique

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