Complete removal of AHPS synthetic dye from water using new electro-fenton oxidation catalyzed by natural pyrite as heterogeneous catalyst

Labiadh, Lazhar; Oturan, Mehmet A.; Panizza, Marco; Hamadi, Naoufel Ben; Ammar, Salah

doi:10.1016/j.jhazmat.2015.04.062

Cited by 236 publications

(69 citation statements)

References 55 publications

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“…Natural pyrite (FeS 2 ), which is commonly found in the vicinity of coal and metal ore mines, has been used for the treatment of polluted water, since a low amount of iron is leached and because pH control of the water/wastewater can be avoided. In previous studies, pyrite was used as heterogeneous electro‐Fenton catalyst for the degradation of tyrosol (TY, 4‐(2‐hydroxyethyl)phenol), the antibiotic levofloxacin, and the 4‐amino‐3‐hydroxy‐2‐ p ‐tolylazo‐naphthalene‐1‐sulfonic acid) (AHPS) synthetic dye . This material circumvents the problem associated with sludge formation and the need for solution pH regulation.…”

Section: Introductionmentioning

confidence: 99%

Mined pyrite and chalcopyrite as catalysts for spontaneous acidic pH adjustment in Fenton and LED photo‐Fenton‐like processes

Ltaïef

Pastrana‐Martínez

Ammar

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND The Fenton‐based processes have been extensively studied for the treatment of pollutants contained in olive mill wastewater (OMW). These processes have some limitations, such as the need for acidic pH control, the generation of a sludge, and the separation of soluble iron species. Mined pyrite (FeS2) and chalcopyrite (CuFeS2) avoid the problem associated with sludge formation and the acidic pH adjustment. The catalytic activity of pyrite and chalcopyrite was investigated for the Fenton and LED (light emitting diode) photo‐Fenton‐like oxidation of tyrosol (TY) and in the treatment of aqueous mixtures containing phenolic compounds. RESULTS The highest mineralization of TY (85%) and lowest Fe leaching (0.89 mg L‐1) was obtained by using chalcopyrite and the LED photo‐Fenton‐like process (0.50 mmol L‐1 of TY initial concentration and 19.0 mmol L‐1 of H2O2 stoichiometric dosage). Complete degradation of the phenolic pollutants and mineralization of 98% was also achieved. CONCLUSION Mined chalcopyrite can be an appropriate photo‐Fenton‐like catalyst in the degradation of phenolic compounds found in OMW because it can provide a high TOC removal, proper acidic pH conditions, low leaching of iron species and spontaneous formation of a small amount of H2O2. However, the catalyst stability must be improved to minimize the leaching of metals. © 2017 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Mined pyrite and chalcopyrite as catalysts for spontaneous acidic pH adjustment in Fenton and LED photo‐Fenton‐like processes

Ltaïef

Pastrana‐Martínez

Ammar

et al. 2017

J of Chemical Tech & Biotech

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“…41,42 The initial pH values were measured in the beginning of the reaction after the addition of the catalyst and H 2 O 2 ; at neutral conditions, the initial pH drops from 5.0 to 4.0 after the catalyst addition, and to 3.5 after H 2 O 2 addition, which suggests the acidic character of the catalyst, as reported for similar iron compounds. 43 At acidic and basic conditions, the adjustment with HCl or NaOH was carried out in presence of the catalyst and the initial value was measured right after H 2 O 2 addition as the reaction started. A maximum degradation of 76% was achieved at neutral pH (3.5), 63% at acidic pH (2.4); however, at basic pH (10.5) only 41% was decolourized after 180 min.…”

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confidence: 99%

Yerba Mate Tea Extract: a Green Approach for the Synthesis of Silica Supported Iron Nanoparticles for Dye Degradation

Trotte¹,

Aben-Athar²,

Carvalho³

2016

Journal of the Brazilian Chemical Society

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This work describes a green approach to the synthesis of iron nanoparticles supported in silica using tea extract of the South American plant yerba mate (Ilex paraguariensis). Catalysts with different iron contents were obtained according to the reaction conditions employed. Characterization by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) revealed the amorphous nature of the nanoparticles, tentatively ascribed to iron(II)/iron(III) oxide composites, as Fourier transform infrared (FTIR) and thermogravimetric analyses confirmed their functionalization by the tea polyphenolic compounds. For the sake of comparison, crystalline zero-valent iron nanoparticles were prepared by the classical method using NaBH 4 . Both materials were tested in the degradation of methyl orange and led to complete decolourization; the green nanoparticles were very active as heterogeneous Fenton-like catalysts in presence of hydrogen peroxide, while the nanoparticles prepared with NaBH 4 were efficient in the reductive degradation of the dye.

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“…For EF, it was found that mineralization effectiveness was enhanced by the utilization of pyrite [30][31][32]. Chalcopyrite CuFeS 2 is an antiferromagnetic semiconductor with complex metal oxidation states, including Cu + , Cu 2+ , Fe 2+ , and Fe 3+ , which could contribute to the Fenton process [33].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Electrochemical treatment of aqueous solutions of catechol by various electrochemical advanced oxidation processes: Effect of the process and of operating parameters

Ltaïef

D’Angelo

Ammar

et al. 2017

Journal of Electroanalytical Chemistry

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Complete removal of AHPS synthetic dye from water using new electro-fenton oxidation catalyzed by natural pyrite as heterogeneous catalyst

Cited by 236 publications

References 55 publications

Mined pyrite and chalcopyrite as catalysts for spontaneous acidic pH adjustment in Fenton and LED photo‐Fenton‐like processes

Mined pyrite and chalcopyrite as catalysts for spontaneous acidic pH adjustment in Fenton and LED photo‐Fenton‐like processes

Yerba Mate Tea Extract: a Green Approach for the Synthesis of Silica Supported Iron Nanoparticles for Dye Degradation

Electrochemical treatment of aqueous solutions of catechol by various electrochemical advanced oxidation processes: Effect of the process and of operating parameters

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