Evaluation of metallurgical slag as a Fenton-type photocatalyst for the degradation of an emerging pollutant: Diclofenac

Arzate, S.; Morales-Pérez, Ariadna-Alicia; Solís-López, Myriam; Ramírez-Zamora, Rosa-María

doi:10.1016/j.cattod.2015.09.026

Cited by 45 publications

(14 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the drawbacks of AOPs was that the majority of the case reached their equilibrium limit in degradation, and only a rare case of treatment could give total degradation. Examples of degradation reactions reaching their equilibrium limits include studies done by Catala [45,46]. However, the newly synthesized catalysts were both extremely fast and could eliminate the dye in solution.…”

Section: Morphological and Microstructural Analysismentioning

confidence: 99%

An External Energy Independent WO3/MoCl5 Nano-Sized Catalyst for the Superior Degradation of Crystal Violet and Rhodamine B Dye

Kim

Bae

et al. 2019

Catalysts

View full text Add to dashboard Cite

In this study, the synthesis of a novel catalyst WO3/MoCl5 was carried out by the thermal method. The method gave an entirely different product compared to previous studies that doped Mo on the surface of semiconductor metal oxides. The degradation reaction of crystal violet (CV) and rhodamine B (RB) dye were done without any energy source. The results showed an incomparably superior result for degradation, with a reaction rate constant of 1.74 s−1 for 30 ppm CV, 1.08 s−1 for 30 ppm RB, and a higher value than 1 s−1 for both cases of 50 ppm dye solution. To the author’s knowledge, this catalyst has the highest reaction rate compared to other studies that targeted CV and RB, with an immense reaction rate increase of more than 100 times. Reusability of the three trials was verified, and the only process required was washing the catalyst after the reaction. One of the drawbacks of the advanced oxidation process (AOP), which has a degradation percent limit, has been solved, since 100% mineralization of the dye was available using this catalyst. FT-IR spectroscopy revealed that W-O-Mo linkage was successfully processed while Mo-Cl linkage has retained. 1H-NMR spectroscopy results confirmed that the degradation product of the dye treated by simple MoCl5 and WO3/MoCl5 was different. Deep inspection of specific regions of NMR fields gave necessary information about the degradation product using WO3/MoCl5.

show abstract

Section: Morphological and Microstructural Analysismentioning

confidence: 99%

An External Energy Independent WO3/MoCl5 Nano-Sized Catalyst for the Superior Degradation of Crystal Violet and Rhodamine B Dye

Kim

Bae

et al. 2019

Catalysts

View full text Add to dashboard Cite

show abstract

“…Arzate-Salgado et al compared copper slag with steel slag in the degradation of diclofenac under simulated solar radiation and in the presence of H 2 O 2 . While steel slag provided rather modest results, CS reduced the concentration of diclofenac to below the detectability limit of 0.1 mg L −1 in 90 min, with a starting concentration of 120 mg L −1 at neutral pH [51].…”

Section: Use Of Copper Slag As a Photocatalystmentioning

confidence: 92%

“…The hydroxyl radical is the most powerful species. Generally, it has been proposed that iron oxides present in the slag are responsible for the catalytic activity [48][49][50][51]. In the case of biological contaminants, these radicals interact with RNA and with the cell membrane, reducing the viability of the organisms [50].…”

Section: Photocatalytic and Advanced Oxidation Processes In Water Trementioning

confidence: 99%

Metallurgical Wastes Employed as Catalysts and Photocatalysts for Water Treatment: A Review

et al. 2019

Self Cite

View full text Add to dashboard Cite

Metallurgical slags are a mass-produced industrial solid waste, often destined to landfills; the volumes disposed represent an environmental burden. Over the last three decades, applications have been found for these wastes, mainly as a low-cost additive in building materials. More recently, their unique chemical properties have attracted attention to produce high-added-value materials for environmental applications, to be used as adsorbents, catalysts, or a source of reactive species in environmental engineering. Such uses can be classified as a function of the added value generated, technological complexity, and environmental impact. This review will focus specifically on the modification and use of slags for catalysis, photocatalysis, and photocatalytic production of hydrogen, which have received relatively little attention in literature. A summary will be presented about the general requirements for using unmodified slags as well as slag processed under alkaline or acidic conditions for advanced oxidation processes. Then, an overview will be given of the use of slags as photocatalysts in water treatment, organized according to the origin of the product (steel, copper, magnesium, ferromanganese), as well as emerging reports on the photocatalytic production of hydrogen, in contrast to the use of highly specific titania-based products developed for the same purpose.

show abstract

“…Advanced oxidation processes producing reactive oxidants (hydroxyl radicals) have been studied as promising technologies because of their success in removing diverse classes of pollutants. For example, the oxidative degradation of DCF by O 3 [12,13], O 3 /H 2 O 2 [14], UV/H 2 O 2 [13], and photo-Fenton processes [15] have been studied. However, these advanced treatment techniques, except the photo-Fenton processes, usually suffer from high operational costs and relatively slow removal kinetics.…”

Section: Introductionmentioning

confidence: 99%

Zero-Valent Iron Nanoparticles and Its Combined Process for Diclofenac Degradation under Various Experimental Conditions

Liang¹,

Zhou²,

Chao-meng³

et al. 2021

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

The use of nanoscale zero-valent iron (nZVI) for the purification of contaminated water and soil was investigated for its high potential to remove subsurface contaminants. In this study, the mechanism of diclofenac (DCF) degradation by nZVI and the combined process of nZVI and hydrogen peroxide (H 2 O 2) are discussed. The results demonstrated that nZVI with acidic conditions had a certain degradation efficiency on DCF, with a removal rate about 30% in a 2-hour reaction at pH 5. The combined process of nZVI and H 2 O 2 could obviously remove DCF, with a removal rate greater than 90% in a 2-hour reaction at pH 5. In nZVI system, under acidic and aerobic conditions, Fe 2+ and H 2 O 2 can be generated to form a Fenton-like system. Meanwhile, the release of electrons from nZVI could promote the reductive dechlorination of DCF. In nZVI/H 2 O 2 system, the high removal rate of TOC was also showed the DCF mineralization by the Fenton-like oxidation.

show abstract

Evaluation of metallurgical slag as a Fenton-type photocatalyst for the degradation of an emerging pollutant: Diclofenac

Cited by 45 publications

References 39 publications

An External Energy Independent WO3/MoCl5 Nano-Sized Catalyst for the Superior Degradation of Crystal Violet and Rhodamine B Dye

An External Energy Independent WO3/MoCl5 Nano-Sized Catalyst for the Superior Degradation of Crystal Violet and Rhodamine B Dye

Metallurgical Wastes Employed as Catalysts and Photocatalysts for Water Treatment: A Review

Zero-Valent Iron Nanoparticles and Its Combined Process for Diclofenac Degradation under Various Experimental Conditions

Contact Info

Product

Resources

About