Comparison of homogeneous and heterogeneous Fenton processes for the removal of reactive dye Magenta MB from aqueous solution

Xavier, Shilpa; Gandhimathi, R.; Nidheesh, P.V.; Ramesh, S.

doi:10.1080/19443994.2013.844083

Cited by 104 publications

(42 citation statements)

References 26 publications

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“…The dye removal efficiency of PS oxidation is severely affected by fluoride ions' addition. Similar result has been observed by Xavier et al [43] for the degradation of dye by Fenton oxidation. With the addition of 40-mg/L NaF during the Fenton oxidation, the efficiency of the Fenton process reduced by 58%.…”

Section: Effect Of Inorganic Ionssupporting

confidence: 88%

“…(6)) at pH 2. Further increase in solution pH from 3 decreased the dye removal efficiency, following the same trends of Fenton reactions [40][41][42][43]. The concentration of ferrous ions is very high at pH near to 3 [44,45].…”

Section: Effect Of Solution Phmentioning

confidence: 76%

“…Our previous work [43] reported 90.9% removal efficiency for the Fenton system at optimal conditions of catalyst concentration of 400 mg/L, H 2 O 2 dosage of 0.38 M, initial pH 3 and dye concentration of 50 mg/L. In the present study, the optimal conditions are Fe(II) dosage of 60 mg/L, PS dosage of 100 mg/L and pH of 3 with a removal efficiency of 96.3% from 100 mg/L MMB dye.…”

Section: Comparison With Fenton Processmentioning

confidence: 99%

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Removal of reactive magenta-MB from aqueous solution by persulphate-based advanced oxidation process

Sarath

Gandhimathi

Ramesh

et al. 2015

Desalination and Water Treatment

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In this study, the possibility of removing magenta-MB by persulphate (PS)-based advanced oxidation process has been evaluated. PS was activated by chemical means with the use of ferrous ion to produce sulphate radical (SO Å 4 ). Experiments were conducted in batch mode. The effect of operational parameters such as PS dosage (varied from 40 to 140 mg/L), ferrous ion dosage (varied from 0 to 100 mg/L), pH (both acidic and basic) and contact time were studied. For an initial dye concentration of 100 mg/L, maximum decolourization efficiency of 96.33% was obtained within 30 min with a PS dosage of 100 mg/L and ferrous ion dosage of 60 mg/L. At the optimum conditions, TOC removal efficiencies of 55.23 and 61.2% were obtained in 30 and 60 min, respectively. The effect of inorganic ions (Cl − , F − and SO 2À 4 ) on the treatment efficiency was also evaluated. It was found that the inhibiting effect due to the presence of inorganic ions followed the order as: F − >> Cl − > SO 2À 4 . Very good removal efficiency obtained with very low chemical dosage (PS and Fe 2+ ) makes iron-activated PS a good alternative for the removal of dye from aqueous solution.

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Section: Effect Of Inorganic Ionssupporting

confidence: 88%

Section: Effect Of Solution Phmentioning

confidence: 76%

Section: Comparison With Fenton Processmentioning

confidence: 99%

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Removal of reactive magenta-MB from aqueous solution by persulphate-based advanced oxidation process

Sarath

Gandhimathi

Ramesh

et al. 2015

Desalination and Water Treatment

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“…Our previous studies [19,20] show that magnetite is an efficient Fenton and electro Fenton catalyst. But the catalytic activity of this magnetite in the presence of UV light is not tested.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Comparative removal of Magenta MB from aqueous solution by homogeneous and heterogeneous photo-Fenton processes

Xavier

Gandhimathi

Nidheesh

et al. 2015

Desalination and Water Treatment

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A B S T R A C TWastewaters originating from dyes production and application industries pose a major threat to surrounding ecosystems because of their toxicity and potentially carcinogenic nature. In this study, the removal of a reactive azo dye called Magenta MB (MMB) was done by photo-Fenton process using heterogeneous Fe 3 O 4 catalyst and homogeneous FeSO 4 catalyst. The effect of different system variables namely catalyst concentration, H 2 O 2 dosage, pH, and initial concentration of the dye were studied. The influence of inorganic salts and ligands in the photo-Fenton system were examined. The stability of Fe 3 O 4 catalyst has also been determined. The homogeneous photo-Fenton system exhibited the highest removal efficiency of 96.7% under the operating conditions of catalyst concentration of 300 mg L −1 , H 2 O 2 dosage of 9 g L −1 , initial pH of 2.5, and concentration of MMB of 50 mg L −1 . The optimum operating condition as per the experimental results for the heterogeneous photo-Fenton system, while using Fe 3 O 4 catalyst is 500 mg L −1 of catalyst dosage and 6 g L −1 of H 2 O 2 dosage for 50 mg L −1 of initial dye concentration at an initial pH of 2.5 in 90 min with a dye removal efficiency of 94.9%. The addition of salts and ligands were found to be having an inhibiting effect on the Fenton system. Results showed that magnetite was found to be an efficient photo-Fenton catalyst for dye removal.

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“…Heterogeneous Fenton processes are powerful method for the destruction of azo dyes in aqueous solutions [8][9][10], especially, those catalyzed by nano-sized magnetite (Fe 3 O 4 ) particles [11][12][13]. In this system, the octahedral site of the magnetite structure can easily accommodate both Fe 2+ and Fe 3+ , allowing the Fe species to be reversibly oxidized and reduced producing •OH radicals when in the presence of H 2 O 2 [14][15].…”

Section: Introductionmentioning

confidence: 99%

Biosorption of azo dyes by raspberry-like Fe3O4@yeast magnetic microspheres and their efficient regeneration using heterogeneous Fenton-like catalytic processes over an up-flow packed reactor

Song

Bai

Puma

et al. 2015

Reac Kinet Mech Cat

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Biosorption of azo dyes by raspberry-like Fe3O4@yeast magnetic microspheres and their efficient regeneration using heterogeneous Fenton-like catalytic processes over an up-flow packed reactor his item ws sumitted to voughorough niversity9s snstitutionl epository y theGn uthorF Citation: yxqD F FFFet lFD PHISF fiosorption of zo dyes y rsperryE like peQyRdyest mgneti mirospheres nd their effiient regenertion using heterogeneous pentonElike tlyti proesses over n upEflow pked retorF etion uinetis wehnisms nd gtlysisD IIS@PAD ppF SRUESTPF Additional Information:• his pper ws epted for pulition in the journl etion uinetisD wehnisms nd gtlysis nd the definitive pulished version is ville t httpXGGdxFdoiForgGIHFIHHUGsIIIRREHISEHVSREz

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Comparison of homogeneous and heterogeneous Fenton processes for the removal of reactive dye Magenta MB from aqueous solution

Cited by 104 publications

References 26 publications

Removal of reactive magenta-MB from aqueous solution by persulphate-based advanced oxidation process

Removal of reactive magenta-MB from aqueous solution by persulphate-based advanced oxidation process

Comparative removal of Magenta MB from aqueous solution by homogeneous and heterogeneous photo-Fenton processes

Biosorption of azo dyes by raspberry-like Fe3O4@yeast magnetic microspheres and their efficient regeneration using heterogeneous Fenton-like catalytic processes over an up-flow packed reactor

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