Magnetic LDH-based CoO–NiFe2O4 catalyst with enhanced performance and recyclability for efficient decolorization of azo dye via Fenton-like reactions

Oladipo, Akeem Adeyemi; Ifebajo, Ayodeji Olugbenga; Gazi, Mustafa

doi:10.1016/j.apcatb.2018.10.050

Cited by 195 publications

(44 citation statements)

References 50 publications

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“…The adsorption isotherm for the EFAC shows a high slope below relative pressure 0.1, and there is a type H4 hysteresis loop at relative pressure range 0.4-1.0, indicating that there are many micropores and slit-like mesopores. 33,34 The adsorption isotherms are type I and IV according to the IUPAC classication, suggesting that the material has both micropores and mesopores. 35 The BET surface area of EFAC is 1070 m 2 g À1 , and the total pore volume is 0.68 cm 3 g À1 , with an average pore diameter of 25.3Å.…”

Section: Resultsmentioning

confidence: 99%

High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism

et al. 2020

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Section: Resultsmentioning

confidence: 99%

High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism

et al. 2020

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“…Additionally, heterogeneous catalysis is more beneficial as: (1) the catalyst is easy to use and store, precisely recovered, and has the feasibility to reuse, (2) can be used at a wide range of pHs, and (3) can avoid the generation of ferric hydroxide precipitation. To enhance reaction performance, complexing agents such as nafion, zeolite, activated charcoal, clay, resin, silica have been used as supporting material for Fe [98,99,100,101,102,103,104,105,106]. Various types of Fenton processes are accessible to use such as photo-Fenton, electro-Fenton, photo-electro Fenton, sono-Fenton, sono-photo Fenton, and sono-electro Fenton processes [107,108].…”

Section: Fenton Reactionmentioning

confidence: 99%

Catalytic Oxidation Process for the Degradation of Synthetic Dyes: An Overview

Javaid

Qazi

2019

IJERPH

288

101

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Dyes are used in various industries as coloring agents. The discharge of dyes, specifically synthetic dyes, in wastewater represents a serious environmental problem and causes public health concerns. The implementation of regulations for wastewater discharge has forced research towards either the development of new processes or the improvement of available techniques to attain efficient degradation of dyes. Catalytic oxidation is one of the advanced oxidation processes (AOPs), based on the active radicals produced during the reaction in the presence of a catalyst. This paper reviews the problems of dyes and hydroxyl radical-based oxidation processes, including Fenton’s process, non-iron metal catalysts, and the application of thin metal catalyst-coated tubular reactors in detail. In addition, the sulfate radical-based catalytic oxidation technique has also been described. This study also includes the effects of various operating parameters such as pH, temperature, the concentration of the oxidant, the initial concentration of dyes, and reaction time on the catalytic decomposition of dyes. Moreover, this paper analyzes the recent studies on catalytic oxidation processes. From the present study, it can be concluded that catalytic oxidation processes are very active and environmentally friendly methods for dye removal.

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“…The adsorption-desorption cycle was carried out three times and there was a minimal decrease in the efficiency of hydrogel on multiple cycles. Therefore, the synthesized hydrogel has enough efficiency to use it several times with appreciable capacity [52][53][54][55].…”

Section: Recycling Studies-adsorption and Desorptionmentioning

confidence: 99%

Nitrate/Nitrite determination in water and soil samples accompanied by in situ azo dye formation and its removal by superabsorbent cellulose hydrogel

et al. 2020

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In the present work, an efficient method is developed for the spectrophotometric determination of nitrite and nitrate ions in water and soil samples by in situ formation of azo dye (Griess reagent) which showed λ max at 385 nm. The reaction condition and the concentration of reagents used are optimized. The molar absorptivity, Sandell's sensitivity, detection limit and quantification limit of the method are found to be 3.22 × 10 4 L mol −1 cm −1 , 1.98 × 10 −6 µg cm −2 , 0.0030 µg mL −1 and 0.0092 µg mL −1 respectively with the linearity range up to 2.6 µg mL −1. The formation of azo dye is confirmed by 1 H and 13 C Nuclear Magnetic Spectroscopy. The azo dye formed during the determination is effectively removed using custom made ecofriendly cellulose modified hydrogel in order to reduce organic load in the test samples. The structure, morphology and the thermal properties of hydrogel are determined by Fourier-transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis respectively. The dye removal mechanism involves pseudo second order kinetics, adsorption is found to be spontaneous based on the thermodynamic parameters and it is befitting to Freundlich isotherm model.

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Magnetic LDH-based CoO–NiFe2O4 catalyst with enhanced performance and recyclability for efficient decolorization of azo dye via Fenton-like reactions

Cited by 195 publications

References 50 publications

High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism

High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism

Catalytic Oxidation Process for the Degradation of Synthetic Dyes: An Overview

Nitrate/Nitrite determination in water and soil samples accompanied by in situ azo dye formation and its removal by superabsorbent cellulose hydrogel

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