Preparation of new adsorbent-supported Fe/Ni particles for the removal of crystal violet and methylene blue by a heterogeneous Fenton-like reaction

Liu, Jiwei; Du, Yufeng; Sun, Wanqing; Chang, Quanchao; Peng, Changsheng

doi:10.1039/c9ra04710g

Cited by 16 publications

(5 citation statements)

References 54 publications

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“…However, further increasing the concentration of H 2 O 2 to180 mM, the catalytic performance was reduced and the DE and reaction rate were 92% and 0.045 min −1 , respectively. When the concentration of H 2 O 2 exceeded the critical level, the reaction rate and degradation efficiency decrease since the residual H 2 O 2 molecules could act as hydroxyl radical recovery agents; OH • can recombine to form HO 2 and O 2 as expressed in equation (3) [62]. (3) H 2 O 2 + O H • ⟶ HO 2 • + H 2 O , HO 2 • + O H • ⟶ H 2 O + O 2 . …”

Section: Resultsmentioning

confidence: 99%

Simple Preparation of the CuO•Fe₃O₄/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range

Ngoc

2022

Adsorption Science & Technology

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SiO2 was prepared from rice husk (RH) with the assistance of cetrimonium bromide (CTAB), and the CuO•Fe3O4/SiO2 composite was prepared by a simple coprecipitation method to enhance the Fenton-like degradation of dyes in a wide pH range. SiO2 was a mesoporous material with a relatively large surface area of 496.4 m2/g and a highly relative pore volume of 1.154 cm3/g. The Fe3O4 and CuO particles with the size of 20–50 nm were well dispersed in the composite, making the composite tighter and causing the disappearance of large pores in the range of 20–55 nm. The surface area and pore volume of the composite were reduced to 248.6 m2/g and 0.420 cm3/g, respectively. Fe3O4/SiO2 and Fe3O4 samples only exhibited high catalytic activity in an acidic medium, while the CuO•Fe3O4/SiO2 composite could effectively work in a wide pH range of 3–7. Besides, the effects of reaction conditions such as catalyst dosage, H2O2 concentration, and initial dye concentration on the catalytic performance of the composite were studied. The optimal conditions for the degradation of dye were tartrazine (TA) concentration of 50 mg/L, dosage catalyst of 0.5 g/L, H2O2 concentration of 120 mM, and pH 5. The CuO•Fe3O4/SiO2 composite reached the highest activity at pH 5, showing a degradation efficiency (DE) of 93.3% and a reaction rate of 0.061 min−1. The reusability of the catalyst was investigated by cyclic experiments. The DE of the 3rd reuse remained at 55.1%, equivalent to 93.5% of the first use. The catalytic mechanism for the Fenton system has also been proposed.

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Section: Resultsmentioning

confidence: 99%

Simple Preparation of the CuO•Fe₃O₄/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range

Ngoc

2022

Adsorption Science & Technology

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“…[5][6][7][8][9] Among these techniques, adsorption is considered to be efficient and economical. [10][11][12] Activated carbon was a commonly adsorbent for dye removal, 13 while the high cost limited its application on a larger scale. 14 Recently, low cost adsorbents have been developed such as natural materials, agricultural by-products and industrial solid wastes.…”

Section: Introductionmentioning

confidence: 99%

Acetone fractionation: a simple and efficient method to improve the performance of lignin for dye pollutant removal

Xing

et al. 2019

RSC Adv.

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“…Generally, the amount of · OH produced is directly proportional to the concentration of H 2 O 2 , that is, the higher the concentration of H 2 O 2 , the more · OH produced, and the more degradation of pollutants. However, when the concentration of H 2 O 2 exceeds the critical value, the degradation rate may be limited because of the reaction of · OH with excess H 2 O 2 and the conversion into a hydrogen peroxide radical ( Liu et al, 2019 ). As shown in Figure 5C , with an increase in the initial H 2 O 2 concentration from 5 to 20 mM, the removal rate of MB did not improve significantly.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

et al. 2022

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Fe3O4-based heterogeneous Fenton catalysts have been widely employed for degrading organic pollutants, however it is challenging to use them in highly efficient and recyclable application in wastewater treatment. In this work, carboxylate-rich carbon (CRC)-modified Fe3O4 magnetic particles are prepared by the sol-gel self-combustion method, where CRC is obtained from the carbonization of sodium gluconate. The CRC/Fe3O4 catalyst exhibits high heterogeneous Fenton degradation performance. The complete 10 mg L−1 methylene blue (MB) removal is achieved in 180 min under conditions of 10 mM H2O2 and 1.00 g of L−1 CRC/Fe3O4 at neutral pH. After five cycles, the structure and morphology of CRC/Fe3O4 composites remained unchanged and the catalytic activity also remained unaltered. Moreover, phenol, benzoic acid (BA), sulfamethazine (SMT), and tetracycline (TC) were also degraded in the heterogeneous Fenton reaction using CRC/Fe3O4 as a catalyst. The strong coordinating ability of –COOH/ –COO– functionalities of CRC formed strong bonds with Fe(II/III) ions on the surfaces of Fe3O4 particles, which was conducive to adsorption of organic matter on the surface of the catalyst and promoted the occurrence of heterogeneous Fenton reactions. It was found that CRC/Fe3O4 had higher removal rates for the adsorptive exclusions of pollutants, such as TC and MB, whereas there were lower removal rates for phenol, BA, and SMT. This work brings potential insights for development of a novel adsorption-enhanced heterogeneous Fenton reaction for wastewater treatment.

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Preparation of new adsorbent-supported Fe/Ni particles for the removal of crystal violet and methylene blue by a heterogeneous Fenton-like reaction

Abstract: Possible reaction mechanism for CV and MB removal by the PM-Fe/Ni with H2O2 system.

Cited by 16 publications

References 54 publications

Simple Preparation of the CuO•Fe₃O₄/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range

Simple Preparation of the CuO•Fe₃O₄/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range

Acetone fractionation: a simple and efficient method to improve the performance of lignin for dye pollutant removal

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

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Preparation of new adsorbent-supported Fe/Ni particles for the removal of crystal violet and methylene blue by a heterogeneous Fenton-like reaction

Abstract: Possible reaction mechanism for CV and MB removal by the PM-Fe/Ni with H2O2 system.

Cited by 16 publications

References 54 publications

Simple Preparation of the CuO•Fe3O4/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range

Simple Preparation of the CuO•Fe3O4/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range

Acetone fractionation: a simple and efficient method to improve the performance of lignin for dye pollutant removal

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

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Simple Preparation of the CuO•Fe₃O₄/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range

Simple Preparation of the CuO•Fe₃O₄/Silica Composite from Rice Husk for Enhancing Fenton-Like Catalytic Degradation of Tartrazine in a Wide pH Range