Performance of montmorillonite/graphene oxide/CoFe2O4 as a magnetic and recyclable nanocomposite for cleaning methyl violet dye-laden wastewater

Foroutan, Rauf; Mohammadi, Réza; MousaKhanloo, Fariba; Sahebi, Soleyman; Ramavandi, Bahman; Kumar, P. Senthil; Vardhan, Kilaru Harsha

doi:10.1016/j.apt.2020.08.001

Cited by 94 publications

(23 citation statements)

References 61 publications

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“…The presence of dyes in aqueous solutions and the environment can affect the photosynthetic functions of plants in water by blocking the sunlight with its aromatic compounds and reducing dissolved oxygen 29 , 31 – 34 . Plus, some dyes, especially cationic and anionic, are also carcinogenic and mutagenic that can affect digestive tract irritation, skin irritation, and cyanosis 28 – 32 . In addition, cationic dyes like MB and anionic dyes such as CR are the most widely used dyes in industries 31 .…”

Section: Introductionmentioning

confidence: 99%

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Nizam

Hanafiah

Mahmoudi

et al. 2021

Sci Rep

186

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In this study, two biomass-based adsorbents were used as new precursors for optimizing synthesis conditions of a cost-effective powdered activated carbon (PAC). The PAC removed dyes from an aqueous solution using carbonization and activation by KOH, NaOH, and H2SO4. The optimum synthesis, activation temperature, time and impregnation ratio, removal rate, and uptake capacity were determined. The optimum PAC was analyzed and characterized using Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), a field emission scanning electron microscope (FESEM), Zeta potential, and Raman spectroscopy. Morphological studies showed single-layered planes with highly porous surfaces, especially PAC activated by NaOH and H2SO4. The results showed that the experimental data were well-fitted with a pseudo-second-order model. Based on Langmuir isotherm, the maximum adsorption capacity for removing methylene blue (MB) was 769.23 mg g−1 and 458.43 mg g−1 for congo red (CR). Based on the isotherm models, more than one mechanism was involved in the adsorption process, monolayer for the anionic dye and multilayer for the cationic dye. Elovich and intraparticle diffusion kinetic models showed that rubber seed shells (RSS) has higher α values with a greater tendency to adsorb dyes compared to rubber seed (RS). A thermodynamic study showed that both dyes’ adsorption process was spontaneous and exothermic due to the negative values of the enthalpy (ΔH) and Gibbs free energy (ΔG). The change in removal efficiency of adsorbent for regeneration study was observed in the seventh cycles, with a 3% decline in the CR and 2% decline in MB removal performance. This study showed that the presence of functional groups and active sites on the produced adsorbent (hydroxyl, alkoxy, carboxyl, and π − π) contributed to its considerable affinity for adsorption in dye removal. Therefore, the optimum PAC can serve as efficient and cost-effective adsorbents to remove dyes from industrial wastewater.

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Section: Introductionmentioning

confidence: 99%

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Nizam

Hanafiah

Mahmoudi

et al. 2021

Sci Rep

186

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“…É oportuno salientar que o grafeno não identificado já era obtido e utilizado em trabalhos científicos, como, por exemplo, em um estudo em que o material tratado como 'filme de carbono bidimensional', certamente se referia a camadas de grafeno [36]. O método pioneiro de síntese do grafeno é a clivagem micromecânica, que consiste resumidamente na remoção de flocos de grafite de uma placa de grafite pirolítica altamente ordenada, por intermédio do uso de fitas adesivas, sendo subsequentemente depositados sobre lâminas de sílica comercial até a formação de uma camada de grafite com espessura atômica [2,11,31]. O grafeno foi o primeiro material cristalino bidimensional isolado de forma estável.…”

Section: Estrutura E Obtenção De Camadas De Grafenounclassified

“…Dentre as matrizes com aplicabilidade para formação de materiais híbridos do grafeno, destacam-se os argilominerais. Apesar de suas propriedades diferenciadas separadamente, a combinação entre argilominerais e compostos de carbono resulta em uma miríade de materiais funcionais com aplicações que vão desde núcleos de lápis a compostos híbridos avançados [6,[9][10][11][12]. Os argilominerais são os principais constituintes das argilas, e estruturalmente constituídos de filossilicatos [13].…”

Section: Introductionunclassified

Híbridos de grafeno/montmorillonita e óxido de grafeno/montmorillonita como nanomateriais funcionais: uma visão da literatura atual

et al. 2021

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Resumo Os híbridos derivados de grafeno ou óxido de grafeno e o argilomineral montmorillonita são materiais cuja matriz do filossilicato oferece estabilização das camadas nanométricas das estruturas carbonáceas, além de melhoramento das propriedade físico-químicas e da biocompatibilidade. Por sua vez, o grafeno e seus derivados agregam novas funcionalidades à montmorillonita e ao aumento da reatividade. Os materiais funcionais resultantes do sinergismo entre os constituintes têm sido explorados em diferentes aplicações, como em processos de remediação ambiental por meio de adsorção e catálise, ciência de materiais, áreas biológicas e biomédicas. No âmbito dessa revisão, as principais rotas para obtenção dos híbridos de grafeno e derivados com montmorillonita são apresentadas, relacionando os fatores estruturais e interações entre os constituintes para formação dos compósitos. Ainda os principais métodos de caracterização são discutidos e as aplicações mais recentes são relacionadas às características estruturais, morfológicas, térmicas e texturais.

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“…Cationic dyes, being as more dangerous than other types, are widely used in the industry. It is reported that 12% of the annual production (about 700,000 tons) of cationic dyes is wasted through industrial water streams polluting the environment [ 8 , 9 ]. Crystal violet (CV) dye is a cationic dye of triphenyl methane with high intensity and it is used in various industries such as pharmaceuticals, paper, textiles and printing inks [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

Foroutan

Peighambardoust

Pateiro³

et al. 2021

Molecules

Self Cite

170

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Activated carbon prepared from lemon (Citrus limon) wood (ACL) and ACL/Fe3O4 magnetic nanocomposite were effectively used to remove the cationic dye of crystal violet (CV) from aqueous solutions. The results showed that Fe3O4 nanoparticles were successfully placed in the structure of ACL and the produced nanocomposites showed superior magnetic properties. It was found that pH was the most effective parameter in the CV dye adsorption and pH of 9 gave the maximum adsorption efficiency of 93.5% and 98.3% for ACL and ACL/Fe3O4, respectively. The Dubinin–Radushkevich (D-R) and Langmuir models were selected to investigate the CV dye adsorption equilibrium behavior for ACL and ACL/Fe3O4, respectively. A maximum adsorption capacity of 23.6 and 35.3 mg/g was obtained for ACL and ACL/Fe3O4, respectively indicating superior adsorption capacity of Fe3O4 nanoparticles. The kinetic data of the adsorption process followed the pseudo-second order (PSO) kinetic model, indicating that chemical mechanisms may have an effect on the CV dye adsorption. The negative values obtained for Gibb’s free energy parameter (−20 < ΔG < 0 kJ/mol) showed that the adsorption process using both types of the adsorbents was physical. Moreover, the CV dye adsorption enthalpy (ΔH) values of −45.4 for ACL and −56.9 kJ/mol for ACL/Fe3O4 were obtained indicating that the adsorption process was exothermic. Overall, ACL and ACL/Fe3O4 magnetic nanocomposites provide a novel and effective type of adsorbents to remove CV dye from the aqueous solutions.

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Performance of montmorillonite/graphene oxide/CoFe2O4 as a magnetic and recyclable nanocomposite for cleaning methyl violet dye-laden wastewater

Cited by 94 publications

References 61 publications

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Híbridos de grafeno/montmorillonita e óxido de grafeno/montmorillonita como nanomateriais funcionais: uma visão da literatura atual

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

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