Removal of Acid Blue 29 in aqueous solution by Fenton and Fenton-like processes

Sahoo, M.K.; Sayoo, L.

doi:10.1080/19443994.2013.797672

Cited by 7 publications

(4 citation statements)

References 39 publications

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“…One such organic pollutant is acid blue 29 (AB29), a colour index name for an anionic diazo dye with chemical formula C 22 H 14 N 6 Na 2 O 9 S 2 and molecular weight 616.49 g mol -1 . 30 It is used in the textiles, leather, plastics, ink and paint industries. 31 It can be recalcitrant when discarded into the environment without proper treatment.…”

Section: Introductionmentioning

confidence: 99%

Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Ani

Akpan

Olutoye

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND Photodegradation has drawn much attention in recent decades due to the technique’s ability to mineralize nonbiodegradable pollutants. Renewable energy sources, such as solar light energy, can be used to aid the reaction in the present of a solar light‐responsive photocatalyst. Mixed metal oxides (TiO2‐ZnO) modified with graphitic carbon nitride (gCNS‐3TiZn) were synthesized successfully and employed for the degradation of AB29 under artificial solar light. Ultrasonication–hydrothermal treatment was used to develop gCNS‐3TiZn. RESULTS Surface analysis investigation showed that the material is mesoporous with 5 nm pore diameter and 195 m2 g–1 surface area. The optical analysis showed successful reduction in the band gap of the material, making it capable of efficiently absorbing light energy in the visible wave region. The developed gCNS‐3TiZn was 3.33‐fold faster at AB29 degradation than the unmodified mixed oxides under the same reaction conditions, and this was attributed to the reduction in band‐gap energy of the catalyst resulting in a better absorption of solar light. It took 60 min to attain complete degradation of 50 ppm AB29 using 1.25 g L–1 gCNS‐3TiZn loading, whereas the AB29 degradation by the unmodified catalyst under the same conditions took 200 min to attain complete degradation. Recyclability study on gCNS‐3TiZn revealed that it can be used up to 10 cycles in the degradation of the selected pollutant without diminished performance. CONCLUSION The synthesized photocatalyst is a potential candidate for real wastewater treatment due to its reusability, stability and ability to utilize solar light as renewable energy source. © 2020 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Ani

Akpan

Olutoye

et al. 2020

J of Chemical Tech & Biotech

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“…This indicates that excess of Fe 2+ acts as a scavenger of HO Å radicals (Eq. (3)) [9,18]. Therefore, 0.05 mM of Fe 2+ was considered as the optimum concentration in this experiment.…”

Section: Effect Of Metal Ion Concentrationmentioning

confidence: 99%

“…Fenton and Fenton-like processes are considered as attractive alternatives for wastewater treatment as iron is non-toxic and available abundantly in nature. Very recent applications of Fenton and Fenton-like processes are found in literature [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Metal ion-catalyzed mineralization and biodetoxification studies of Calconcarboxylic acid in aqueous solution: effect of –COOH group

Sahoo

Sinha

Sharan

2015

Desalination and Water Treatment

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A B S T R A C TMineralization and biodetoxification studies of Calconcarboxylic acid (CCA), an azo dye, were undertaken by metal ion-catalyzed oxidation processes, viz. Fenton and Fenton-like processes and the effect of presence of -COOH group thereon were established. The metal ions used were Fe 2+ and Ag + and the oxidants used were hydrogen peroxide (HP) and ammonium persulfate (APS). For a given oxidant, Fe 2+ is found to be the most suitable catalyst and among the oxidants, APS proves to be most suitable one. As all the systems yield maximum mineralization at pH 1, Fe 2+ /APS at pH 1 is the most suitable system. It is observed that mineralization is favored by Fe 2+ /HP process due to the presence of -COOH group in CCA and by Fe 2+ /APS process in its absence. Removal of -COOH group causes a shift in optimum pH, for Fenton process, to 3 accompanied by a corresponding drop in mineralization from 70.6 to 35.6% and an increase from 73.2 to 91.1% in Fe 2+ /APS system. Bioassay experiment reveals that the treated solutions are ≥50% biotoxic than the untreated dye, which could be reduced to 22.7 and 26.7% in Fe 2+ /APS and Ag + /APS systems, respectively, when the -COOH group is removed.

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“…In the presence and absence of air by Fenton and Fenton-like processes using hydrogen peroxide (HP) and sodium persulfate (SPS), respectively, as oxidants 95.8% at pH 3 in 180 min. [84] 5.…”

Section: Photocatalysis By Ctpmentioning

confidence: 99%

Synthesis of Polyaniline Supported CdS/CdS-ZnS/CdS-TiO2 Nanocomposite for Efficient Photocatalytic Applications

et al. 2022

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Photocatalytic degradation can be increased by improving photo-generated electrons and broadening the region of light absorption through conductive polymers. In that view, we have synthesized Polyaniline (PANI) with CdS, CdS-ZnS, and CdS-TiO2 nanocomposites using the chemical precipitation method, characterized and verified for the photo-degradation of Acid blue-29 dye. This paper provides a methodical conception about in what way conductive polymers “PANI” enhances the performance rate of composite photocatalysts (CdS, CdS-ZnS and CdS-TiO2). The nanocomposites charge transfer, molar ratio, surface morphology, particle size, diffraction pattern, thermal stability, optical and recombination of photo-generated charge carrier properties were determined. The production of nanocomposites and their efficient photocatalytic capabilities were observed. The mechanism of photocatalysis involved with PC, CZP and CTP nanocomposites are well presented by suitable diagrams representing the exchange of electrons and protons among themselves with supported equations. We discovered that increasing the number of nanocomposites in the membranes boosted both photocatalytic activity and degradation rate. CdS-Zinc-PANI (CZP) and CdS-TiO2-PANI(CTP) nanocomposites show entrapment at the surface defects of Zinc and TiO2 nanoparticles due to the demolition of unfavorable electron kinetics, and by reducing the charge recombination, greater photocatalytic activity than CdS-PANI (CP) with the same nanoparticle loading was achieved. With repeated use, the photocatalysts’ efficiency dropped very little, hinting that they may be used to remove organic pollutants from water. The photocatalytic activity of CZP and CTP photocatalytic membranes was greater when compared to CdS-PANI, which may be due to the good compatibility between CdS and Zinc and TiO2, as well efficient charge carrier separation. PANI can also increase the split-up of photo-excited charge carriers and extend the absorption zone when combined with these nanoparticles. As a result, the development of outrageous performance photocatalysts and their potential uses in ecological purification and solar power conversion has been facilitated. The novelty of this article is to present the degradation of AB-29 Dye using nanocomposites with polymers and study the enhanced degradation rate. Few studies have been carried out on polymer nanocomposites and their application in the degradation of AB-29 dyes and remediation of water purposes. Nanoparticle CdS is a very effective photocatalyst, commonly used for water purification along with nanoparticle ZnS and TiO2; but cadmium ion-leaching makes it ineffective for practical and commercial use. In the present work, we have reduced the leaching of hazardous cadmium ions by trapping them in a polyaniline matrix, hence making it suitable for commercial use. We have embedded ZnS and TiO2 along with CdS in a polyaniline matrix and compared their photocatalytic activity, stability, and reusability, proving our nano-composites suitable for commercial purposes with enhanced activities and stabilities, which is a novelty. All synthesized nanocomposites are active within the near-ultraviolet to deep infrared (i.e., 340–850 nm). This gives us full efficiency of the photocatalysts in the sunlight and further proves the commercial utility of our nanocomposites.

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Removal of Acid Blue 29 in aqueous solution by Fenton and Fenton-like processes

Cited by 7 publications

References 39 publications

Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Metal ion-catalyzed mineralization and biodetoxification studies of Calconcarboxylic acid in aqueous solution: effect of –COOH group

Synthesis of Polyaniline Supported CdS/CdS-ZnS/CdS-TiO2 Nanocomposite for Efficient Photocatalytic Applications

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Removal of Acid Blue 29 in aqueous solution by Fenton and Fenton-like processes

Cited by 7 publications

References 39 publications

Solar light responsive TiO2‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Solar light responsive TiO2‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Metal ion-catalyzed mineralization and biodetoxification studies of Calconcarboxylic acid in aqueous solution: effect of –COOH group

Synthesis of Polyaniline Supported CdS/CdS-ZnS/CdS-TiO2 Nanocomposite for Efficient Photocatalytic Applications

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Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29

Solar light responsive TiO₂‐ZnO, modified with graphitic carbon nitride nano‐sheet for degradation of AB29