Photodegradation of the anthraquinonic dye Acid Green 25 by TiO2 immobilized on carbonized avocado kernels: Intermediates and toxicity

Dávila-Jiménez, Martín M.; Elizalde-González, Marı́a P.; García-Díaz, Esmeralda; Marín‐Cevada, Vianey; Zequineli-Pérez, Jacquelin

doi:10.1016/j.apcatb.2014.11.034

Cited by 15 publications

(5 citation statements)

References 42 publications

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“…Next, the deamination and oxidation can take place [55]. The suggested degradation compounds and mechanism are in agreement with earlier reports on the degradation of azo and anthraquinone dyes [56][57][58][59].…”

Section: Biodegradation Productssupporting

confidence: 89%

Catalytic and Physicochemical Evaluation of a TiO2/ZnO/Laccase Biocatalytic System: Application in the Decolorization of Azo and Anthraquinone Dyes

Kołodziejczak-Radzimska

Zembrzuska

Siwińska-Ciesielczyk

et al. 2021

Materials

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A TiO2/ZnO oxide system was proposed as a support for the immobilization of laccase from Trametes versicolor (LTV). The obtained TiO2/ZnO/LTV biocatalytic system was then applied in the decolorization/degradation of C.I. Reactive Black 5 and C.I. Acid Green 25 dyes. The efficiency of immobilization was evaluated based on catalytic properties (Bradford method, oxidation reaction of 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) and physicochemical (spectroscopic, porous, electrokinetic) analysis. The immobilization process was carried out with high performance (99.4%). Immobilized laccase retained about 40% of its activity in the whole analyzed temperature range and after 10 reaction cycles. Immobilization efficiency was also indirectly confirmed by the presence of characteristic functional groups (–C–H and –C–O), nitrogen and carbon on the TiO2/ZnO/LTV biocatalytic surface, identified by spectroscopic analyses. The increase in the surface area to 126 m2/g, change of isoelectric point (2.0) and zeta potential ranges (from +12.0 to −20.0 mV) after the immobilization process were also observed. The results show that the designed biocatalytic system enables the removal of acid dyes (C.I. Reactive Black 5 and C.I. Acid Green 25) with high efficiency (99% and 70%, respectively). Mass spectroscopy analysis indicated possible degradation products formed by the cleavage of N=N and C–N bonds.

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Section: Biodegradation Productssupporting

confidence: 89%

Catalytic and Physicochemical Evaluation of a TiO2/ZnO/Laccase Biocatalytic System: Application in the Decolorization of Azo and Anthraquinone Dyes

Kołodziejczak-Radzimska

Zembrzuska

Siwińska-Ciesielczyk

et al. 2021

Materials

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“…Recently, titanium oxide nanoparticles combined with carbon matrix (namely composite materials) drew attention in photocatalysis and an inexpensive TiO 2 immobilization method on carbon obtained by avocado seeds was developed. This system was able to adsorb and decompose the dye Acid Green 25 (for this dye, used to stain silk and wool, the Scientific Committee on Consumer Products of the European Union stated the lack of information about its safety) almost completely under both sunlight and under UV irradiation (Dávila‐Jiménez et al ., ). Avocado seed was also used to prepare an activated carbon via methanesulphonic acid activation, which was successfully tested for the property of removing ammonium from aqueous solutions (Zhu et al ., ).…”

Section: Avocado Seedsmentioning

confidence: 99%

Avocado (Persea americana Mill.) by‐products and their impact: from bioactive compounds to biomass energy and sorbent material for removing contaminants. A review

Colombo

Papetti

2019

Int J of Food Sci Tech

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Avocado industry produces enormous by-products and represents an important source of raw material in food and non-food applications. This review aims to focus the attention on the valorisation of avocado wastes recycling to produce different materials with important industrial and environmental impacts. In fact, peels and seeds can be reused in food and cosmetic fields due to the presence of bioactive ingredients such as polyphenols; thanks to their antioxidant and antinflammatory activities. In addition, both peels and seeds can be reused in the production of carbonaceous materials with important consequences for environmental pollution in the removal of contaminants from water. Interesting applications of avocado wastes in photocatalysis and biofuel production are also discussed. All the utilisations attest the great potential of recycling avocado by-products, a little known resource.

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“…Recently, Dávila-Jiménez et al 156 prepared a series of TiO 2 / carbon composite materials from carbonized avocado kernels and sols of TiO 2 ; their short preparation in fewer steps uses carbon with acidic groups that favors the interaction with TiO 2 . The most efficient composites were obtained from carbons with the largest specific surface areas and a suitable micropore-mesopore ratio, favoring the immobilization of a larger amount of TiO 2 particles, regardless of the pHPZC of the carbon ( pH where the carbon surface has neutral charge).…”

Section: Tio 2 /Carbon Waste and Residuesmentioning

confidence: 99%

Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources

2016

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Photodegradation of the anthraquinonic dye Acid Green 25 by TiO2 immobilized on carbonized avocado kernels: Intermediates and toxicity

Cited by 15 publications

References 42 publications

Catalytic and Physicochemical Evaluation of a TiO2/ZnO/Laccase Biocatalytic System: Application in the Decolorization of Azo and Anthraquinone Dyes

Catalytic and Physicochemical Evaluation of a TiO2/ZnO/Laccase Biocatalytic System: Application in the Decolorization of Azo and Anthraquinone Dyes

Avocado (Persea americana Mill.) by‐products and their impact: from bioactive compounds to biomass energy and sorbent material for removing contaminants. A review

Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources

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