Synthesis, characterization and application of nanoscale zero-valent iron in the degradation of the azo dye Disperse Red 1

Barreto-Rodrigues, Márcio; Silveira, Jefferson E.; Zazo, Juan A.; Rodrı́guez, Juan J.

doi:10.1016/j.jece.2016.12.041

Cited by 43 publications

(11 citation statements)

References 21 publications

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“…21a shows the In early research, the disperse red 1 azo dye adsorption on nZVI has been evaluated. 209 About 98% color removal was recorded in a fairly short time 10 min. Also, the capability of adsorbing MB basic dye was studied at optimum operating conditions of pH 9.5, adsorbent dosage 0.5 g L À1 , and contact time of 1 min.…”

Section: Biosorbentsmentioning

confidence: 99%

Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

2021

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Section: Biosorbentsmentioning

confidence: 99%

Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

2021

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“…Barreto-Rodrigues et al, for example, obtained the highest reactivity for nZVI when a high rate of addition of NaBH 4 , low pH (2-3), and a Fe 2+ :BH 4 − molar ratio of 1:3 were used during the synthesis. The product contained NPs with a mean crystallite diameter of 70 nm and sphere-like morphology in chain aggregates [18]. Han et al optimized the synthesis conditions of nZVI and observed that the reductive reactivity of nZVI was most sensitive to the initial concentration of the iron precursor, borohydride feed rate, and the loading ratio of borohydride to ferric ion.…”

Section: Solution Based Processesmentioning

confidence: 99%

Synthesis and Application of Zero-Valent Iron Nanoparticles in Water Treatment, Environmental Remediation, Catalysis, and Their Biological Effects

2020

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Present and past anthropogenic pollution of the hydrosphere and lithosphere is a growing concern around the world for sustainable development and human health. Current industrial activity, abandoned contaminated plants and mining sites, and even everyday life is a pollution source for our environment. There is therefore a crucial need to clean industrial and municipal effluents and remediate contaminated soil and groundwater. Nanosized zero-valent iron (nZVI) is an emerging material in these fields due to its high reactivity and expected low impact on the environment due to iron’s high abundance in the earth crust. Currently, there is an intensive research to test the effectiveness of nZVI in contaminant removal processes from water and soil and to modify properties of this material in order to fulfill specific application requirements. The number of laboratory tests, field applications, and investigations for the environmental impact are strongly increasing. The aim of the present review is to provide an overview of the current knowledge about the catalytic activity, reactivity and efficiency of nZVI in removing toxic organic and inorganic materials from water, wastewater, and soil and groundwater, as well as its toxic effect for microorganisms and plants.

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“…As nanopartículas de ferro zero valente (nFZV), por exemplo, com tamanho menor que 100 nm (≈0,1 μm), representam uma alternativa eficaz, pois têm área de superfície maior, alta densidade de sítios reativos em sua superfície e facilidade de dispersão (BARRETO-RODRIGUES et al, 2017). No entanto, um grave percalço no uso de nFZV é a sua aglomeração rápida (AMBIKA;…”

Section: Introductionunclassified

Aplicação de carepa de aço para degradação de 2,4-dinitrofenol por meio de sistema de oxidação avançada do tipo Fenton

Moresco

Falchi

Ferreira

et al. 2021

Eng. Sanit. Ambient.

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RESUMO Considerado um poluente prioritário de reconhecida toxicidade e recalcitrância, o 2,4-dinitrofenol (2,4-DNF) presente em águas residuárias dificulta tratamentos convencionais, especialmente os de princípio biológico, como lagoas aeradas e sistema de lodos ativados. Em função de sua potencialidade de transformar a estrutura de poluentes em elementos de capacidade poluidora reduzida, os processos oxidativos avançados (POAs) representam atualmente uma alternativa para o tratamento de efluentes contaminados com compostos dessa natureza. A presente pesquisa teve como objetivo realizar estudos de degradação de 2,4-DNF em solução aquosa por meio de processos de oxidação avançada do tipo Fenton utilizando uma fonte não convencional de ferro na forma de um resíduo siderúrgico (carepa de aço). A condução de um delineamento experimental fundamentado em planejamento fatorial de experimentos revelou que as variáveis quantidade de peróxido de hidrogênio e de carepa influenciaram significativamente a degradação de 2,4-DNF, proporcionando, em condições otimizadas (20 g de carepa, 0,5 mL de H2O2 em pH 3), elevada eficiência na degradação tanto do composto modelo quanto de seus intermediários reacionais, tendo reduzido também a toxicidade aguda medida na forma de inibição de crescimento de E. coli. Ensaios adicionais sugeriram que os mecanismos reacionais pelos quais ocorre a degradação do 2,4-DNF são mediados tanto pela superfície das partículas de carepa quanto pelo ferro lixiviado, caracterizando o processo como uma combinação de oxidação homogênea e heterogênea. Finalmente, ensaios de reusabilidade e operação em reator de fluxo contínuo sugeriram significativa potencialidade do sistema carepa/H2O2.

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Synthesis, characterization and application of nanoscale zero-valent iron in the degradation of the azo dye Disperse Red 1

Cited by 43 publications

References 21 publications

Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

Synthesis and Application of Zero-Valent Iron Nanoparticles in Water Treatment, Environmental Remediation, Catalysis, and Their Biological Effects

Aplicação de carepa de aço para degradação de 2,4-dinitrofenol por meio de sistema de oxidação avançada do tipo Fenton

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