Photo-Fenton degradation of ammonia via a manganese–iron double-active component catalyst of graphene–manganese ferrite under visible light

Zhou, Yang; Xiao, Bo; Liu, Shou-Qing; Meng, Zhen; Chen, Zhigang; Zou, Cong-yang; Liu, Cheng-Bao; Chen, Feng; Zhou, Xing

doi:10.1016/j.cej.2015.07.049

Cited by 155 publications

(39 citation statements)

References 52 publications

(65 reference statements)

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“…In addition to the above three typical peaks appearing in CA, there are two stronger peaks at 558 cm −1 and 475 cm −1 . The former one corresponded to the intrinsic stretching vibration of manganese-oxygen (Mn-O) bonds, which was caused by the MnFe 2 O 4 of octahedral shape [39]; the latter could be attributed to the intrinsic vibration of metal-oxygen (Mn-O and Fe-O) bonds at octahedral sites from MnFe 2 O 4 [40], confirming MnFe 2 O 4 prepared in-situ over CA had spinel structure [41]. These results confirmed the presence of octahedral MnFe 2 O 4 over CA, which was in line with the evidence obtained in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Removal of Reactive Dyes in Textile Effluents by Catalytic Ozonation Pursuing on-Site Effluent Recycling

Shang

Chiu

2019

Molecules

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The textile wash-off process consumes substantial amounts of water, which generates large volumes of wastewater that pose potential pollution issues for the environment. In the present study, catalytic ozonation was applied to degrade residual dyes present in rinsing effluents from wash-off processes towards the aim of recycling the waste effluents. A magnetic catalyst was prepared for promoting dye degradation by catalytic ozonation. Via a hydrothermal reaction, highly magnetic manganese ferrite (MnFe2O4) particles were successfully loaded on carbon aerogel (CA) materials (MnFe2O4@CA). The results showed that the developed catalyst strikingly promoted the degradation of dye contaminants by catalytic ozonation, in terms of color removal and reduction of chemical oxidation demand (COD) in rinsing effluents. COD removal efficiency in catalytic ozonation was enhanced by 25% when compared with that achieved by ozonation alone under the same treatment conditions. Moreover, we confirmed that after catalytic ozonation, the rinsing effluents could be recycled to replace fresh water without any evident compromise in the color quality of fabrics. The color difference (ΔEcmc(2:1)) between fabrics treated with recycled effluents and water was not more than 1.0, suggesting that the fabrics treated with recycled effluents displayed acceptable color reproducibility. Although colorfastness and color evenness of fabrics treated with recycled effluents were slightly poorer than those of fabrics treated with water, they were still within the acceptable tolerance. Therefore, the present study validated that catalytic ozonation was a promising technology for saving water and wastewater elimination in textile dyeing. It provides a feasibility assessment of catalytic ozonation for recycling waste effluents to reduce water dependence in textile production. Furthermore, we show a new perspective in on-site recycling waste effluents by catalytic ozonation and enrich the knowledge on feasible approaches for water management in textile production.

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Section: Resultsmentioning

confidence: 99%

Removal of Reactive Dyes in Textile Effluents by Catalytic Ozonation Pursuing on-Site Effluent Recycling

Shang

Chiu

2019

Molecules

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“…Few studies were found in the literature with research focusing on the use of MnFe2O4 or composites of graphene and MnFe2O4 for bactericidal activity in water treatment (Chella et al, 2015). Most research focused on their antibacterial activity for the development of novel nanomaterials for biomedical applications (Esmaeili amd Ghobadianpour, 2016;Sakho et al, 2019), drug-delivery (Wang et al, 2016) and photocatalytic activity (Zhou et al, 2016a).…”

Section: Introductionmentioning

confidence: 99%

Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes

Soletti¹,

Ferreira²,

Kassada³

et al. 2020

Rev. ambiente água

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The main objective of this study was to synthesize a nanocomposite using graphene and manganese ferrite nanoparticles (MnFe2O4-G) and to evaluate its antibacterial activity for water treatment purposes. Its morphological characteristics were evaluated by instrumental techniques, such as scanning electron microscopy and transmission electron microscopy. The characterization results indicated that the nanocomposite presented nanoparticles of approximately 25 nm well dispersed in transparent and large (14 μm) graphene nanosheets. The antibacterial activity was evaluated in a batch experiment using a concentration of 40 μg mL-1 of nanocomposite (MnFe2O4-G, bare MnFe2O4 nanoparticles or graphene oxide), 1x105 CFU mL-1 of Escherichia coli, and 8 h of contact time at room temperature. The highest antibacterial capacity was observed for the hybrid nanocomposite (91.91%), due to the synergic effect of graphene and MnFe2O4 nanoparticles. Various mechanisms were proposed to explain the effective antibacterial activity of MnFe2O4-G, such as wrapping, oxidative stress, sharp-edge cutting effect, among others. The results showed that MnFe2O4-G is a potential alternative in water treatment processes as an antibacterial agent.

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“…), chemical methods (photocatalysis, chemical oxidation, etc.) and biological methods [9][10][11][12]. Since plant residues have high adsorption capacity for organic pollutants, and they are easily modified into adsorbents with high adsorption capacity, more and more researches have been conducted on the removal of organic pollutants by biomass materials [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Design of iron-ion-doped pomelo peel biochar composites towards removal of organic pollutants

Liu

Yao

et al. 2019

SN Appl. Sci.

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After treated with saturated iron(II) chloride water solution at pH ~ 2, pomelo peel was used as precursor for preparation of 3 biochar composites (named CFe1, CFe2 and CFe3, accordingly) via hydrothermal treatment and followed calcination in air, respectively. The as-obtained C/Fe biochar composites were studied with PXRD, SEM, EDS, UV-visible spectroscopy and specific surface area device to analyze their phase, morphology, composition, capacity for light absorption and specific surface area. Furthermore, the adsorption and photocatalytic performances of the 3 biochar composites on rhodamine B (RhB) water solution were investigated. The experimental results show that the hydrothermal pomelo peel biochar composites have better adsorption performance in degrading RhB than that obtained from calcining pomelo peel in air, but opposite for the photocatalytic performance. The removal of imidacloprid (a pesticide) from water via CFe1 was also studied.

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Photo-Fenton degradation of ammonia via a manganese–iron double-active component catalyst of graphene–manganese ferrite under visible light

Cited by 155 publications

References 52 publications

Removal of Reactive Dyes in Textile Effluents by Catalytic Ozonation Pursuing on-Site Effluent Recycling

Removal of Reactive Dyes in Textile Effluents by Catalytic Ozonation Pursuing on-Site Effluent Recycling

Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes

Design of iron-ion-doped pomelo peel biochar composites towards removal of organic pollutants

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