Methylene blue dye: Toxicity and potential elimination technology from wastewater

Oladoye, Peter Olusakin; Ajiboye, Timothy O.; Omotola, Elizabeth Oyinkansola; Oyewola, Olusola Joel

doi:10.1016/j.rineng.2022.100678

Cited by 443 publications

(174 citation statements)

References 197 publications

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“…Even at very low concentrations, these pollutants, recognized as highly durable and water soluble and characterized by their own form and mechanism of action, cause serious injuries to human health and to the environment. Allergic reactions, association with systemic diseases, skin irritations [ 13 ], mutagenic and carcinogenic potential, high toxicity, respiratory and renal failure [ 14 ], cyanosis, tissue necrosis, and jaundice [ 15 ] can be cited as negative effects of dyes on humans. As well, dyes inhibit plant growth, cause reductions in pigment and protein content of microalgae, and have toxic effects on aquatic life, resulting in breathing troubles, movement difficulties, and malformations [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Grigoraș

Simion

Favier

et al. 2022

Gels

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The treatment of contaminated water is currently a major concern worldwide. This work was directed towards the preparation of a composite hydrogel by entrapping cherry stones powder on chitosan, which is known as one of the most abundant natural polymers. The synthesized material was characterized by scanning electron microscopy, by Fourier transform infrared spectroscopy, and by the point of zero charge determination. Its ability to remove two azo dyes models (Acid Red 66 and Reactive Black 5) existing in single form and in binary mixture was evaluated. Response Surface Methodology–Central Composite Design was used to optimize three parameters affecting the process while targeting the lowest final contaminant concentrations. The best results were obtained at pH 2, an adsorbent dose of 100 g/L, and a temperature of 30 °C, when more than 90% of the pollutants from the single component systems and more than 70% of those of the binary mixtures were removed from their aqueous solutions. The adsorption process was in accordance with Elovich and pseudo-second-order kinetic models, and closely followed the Freundlich and Temkin equilibrium isotherms. The obtained results led to the conclusion that the prepared hydrogel composite possesses the ability to successfully retain the target molecules and that it can be considered as a viable adsorbent material.

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Section: Introductionmentioning

confidence: 99%

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Grigoraș

Simion

Favier

et al. 2022

Gels

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“…On the other hand, in the Freundlich adsorption isotherm model, the nature of the adsorption process is multilayer. Equation (10) is the general equation for the Freundlich isotherm model, whereas the linearized form is presented in Eq. (11) 46 .…”

Section: Batch Adsorption Experimentmentioning

confidence: 99%

“…Specifically, MB is a synthetic, heterocyclic aromatic, C 16 H 18 N 3 SCl 319.85 g/mol, (3,7-bis(dimethylamino) phenothiazine chloride tetra methylthionine chloride), and cationic chemical compound 9 . A large quantity of MB is used as a colorant for wool, silk, papers, cosmetics, temporary hair colorants, cotton, textile, food, and pharmaceutical industries 10 . MB is known for its antioxidant, cardio-protective, antimalarial, and antidepressant properties.…”

Section: Introductionmentioning

confidence: 99%

“…MB is known for its antioxidant, cardio-protective, antimalarial, and antidepressant properties. Precisely, MB is a popular cationic dye and environmentally persistent, toxic, carcinogenic, and mutagenic chemical 10 . Introducing colored wastewater into the ecosystem is a notable cause of eutrophication, aesthetic pollution, and disruptions to aquatic life 11 .…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of methylene blue from textile industrial wastewater using activated carbon developed from Rumex abyssinicus plant

Fito

Abewaa²,

Mengistu³

et al. 2023

Sci Rep

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Methylene blue (MB) is abundantly found in textile industrial effluent which can cause severe health problems for public and environmental ecology. Therefore, this study aimed to remove MB from textile wastewater using the activated carbon developed from Rumexabyssinicus. The adsorbent was activated using chemical and thermal methods, and then it was characterized by SEM, FTIR, BET, XRD, and pH zero-point charge (pHpzc). The adsorption isotherm and kinetics were also investigated. The experimental design was composed of four factors at three levels (pH (3, 6, and 9), initial MB concentration (100, 150, and 200 mg/L), adsorbent dosage (20, 40, and 60 mg/100 mL), and contact time (20, 40, and 60 min)). The adsorption interaction was evaluated using response surface methodology. The characterization of a Rumexabyssinicus activated carbon was found to have multiple functional groups (FTIR), an amorphous structure (XRD), crack with ups and down morphology (SEM), pHpzc of 5.03 and a high BET-specific surface area of 2522 m2/g. The optimization of MB dye removal was carried out using the Response Surface methodology coupled with the Box Behnken approach. The maximum removal efficiency of 99.9% was recorded at optimum conditions of pH 9, MB concentration of 100 mg/L, the adsorbent dosage of 60 mg/100 mL, and contact time of 60 min. Among the three adsorption isotherm models, the Freundlich isotherm model was the best fit with an experimental value at R2 0.99 showing the adsorption process was heterogeneous and multilayer whereas the kinetics study revealed that pseudo-second-order at R2 0.88. Finally, this adsorption process is quite promising to be used at an industrial level.

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“… , For this reason, it is often referred to as a clock reaction. − Furthermore, over 100 tons of dyes are emptied into the environment yearly; this includes MB . Many of these dyes are mutagenic, carcinogenic, toxic for human consumption, − and can be harmful to aquatic life; , the dye in water disrupts photosynthesis of algae causing issues down the food chain . A better understanding of the dye reduction/decolorization processes is critical toward the development of new remediation strategies.…”

Section: Introductionmentioning

confidence: 99%

Tracking the Seconds of a Clock Reaction: A Multiparametric Experimental Study on the Catalytic Reduction of Methylene Blue

et al. 2023

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The catalytic reduction and subsequent reoxidation of methylene blue (MB) is a well-known reaction, commonly referred to as a "clock reaction". Specifically, the reduction process is accompanied by a color change from intense blue to clear and can be readily monitored by UV−vis spectroscopy via the decrease in absorbance at λ max = 664 nm, providing facile access to valuable reaction kinetics. Unsurprisingly, the reduction of methylene blue has become a widely used probe for heterogeneous catalyst reactivity. Yet, despite its broad utility, the mechanism of reduction is not well-understood. Herein, we report an experimental study on the mechanism of MB reduction using Pt/C nanoparticles. Through a multiparametric study incorporating in situ probing of reaction kinetics, pH, dissolved oxygen, and variable catalyst and reductant loading, the multiple factors impacting the reaction are disentangled. We demonstrate that the reaction steps that limit the reduction of MB are the H 2 evolution and reoxidation sequences. We limit these competitive reactions by optimizing reductant concentration and catalyst loading, N 2 purging, and restriction of O 2 redissolution. This achieves a highly competitive activity parameter of 25,740 min −1 g Pt −1 L.

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Methylene blue dye: Toxicity and potential elimination technology from wastewater

Cited by 443 publications

References 197 publications

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Adsorption of methylene blue from textile industrial wastewater using activated carbon developed from Rumex abyssinicus plant

Tracking the Seconds of a Clock Reaction: A Multiparametric Experimental Study on the Catalytic Reduction of Methylene Blue

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