Methylene blue adsorption by timbaúva (Enterolobium contortisiliquum)-derived materials

Alvarenga, Glademir; Lima, Jarrie P.; Rosa, Clarissa H.; Rosa, Gilber R.; Lopes, Toni Jefferson

doi:10.1007/s11356-020-09113-4

Cited by 18 publications

(6 citation statements)

References 64 publications

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“…Methylene Blue Index: The methylene blue index is a measure of the mesoporosity (2-50 nm) present in activated carbons and is defined as the maximum amount of dye adsorbed on 1 g of adsorbent. [23,24] Sorption experiments were investigated by adding 100 mg of each adsorbent to a Falcon tube containing 25 mL of adsorbate and 5 mL of 5% acetic acid. Sorption equilibrium was established for an initial methylene blue concentration of 50 mg L −1 for 24 h at room temperature.…”

Section: Methodsmentioning

confidence: 99%

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Sewage Sludge Activated Carbon as an Adsorbent and Catalytic Support: Evaluation of Nitrate Removal and Suzuki‐Miyaura Cross‐Coupling

Rosa

Schmitt

Fonseca

et al. 2022

CLEAN Soil Air Water

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This manuscript reports the valorization of sewage sludge with the production of activated carbon. Thus, a series of 11 adsorbents are produced, activated with different substances (salt, acid, and base), and their adsorptive properties are carefully evaluated. The C6 series of activated carbons prove to be very efficient for removing nitrate anions from aqueous medium and, due to this, it is evaluated as a catalytic support for palladium nanoparticles. The generated solid, named Pd@CA6F, is the first report of a catalyst containing activated carbon from sewage sludge that is efficient in the Suzuki-Miyaura cross-coupling. The catalytic system developed is eco-friendly, phosphine-free, and of low cost. Good yields are obtained in the coupling of aryl iodides with phenylboronic acid in a short time. The same catalyst load could be recycled for up to ten times.

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Section: Methodsmentioning

confidence: 99%

“…The methylene blue index is also considered as another adsorption test probe. [23,24] Thus, the adsorbents produced were compared with CAC with this dye removal technique (Figure 5b).…”

Section: Adsorption Testsmentioning

confidence: 99%

Sewage Sludge Activated Carbon as an Adsorbent and Catalytic Support: Evaluation of Nitrate Removal and Suzuki‐Miyaura Cross‐Coupling

Rosa

Schmitt

Fonseca

et al. 2022

CLEAN Soil Air Water

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“…MoS2 on MB can be maintained at more than 93.47%, indicating that the adsorbent has a wide pH adsorption range. In the local pH range (3)(4)(5), the removal rate of MB solution by MoS2 adsorbent decreased slightly. This is because the surface of MoS2 adsorbent has anionic charge, and MB belongs to cationic dye.…”

Section: Effect Of Ph On Mb Adsorptionmentioning

confidence: 99%

“…Methylene blue (MB) is an azo dye with a heterocyclic aromatic cation structure, which is often used in the textile industry. Because its complex aromatic structure is difficult to be degraded by traditional biological treatment processes [4,5], it is necessary to find an effective treatment method.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials

Wang

Zhang

et al. 2022

Sustainability

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In this study, flower-like MoS2 nanomaterials were synthesized by hydrothermal method with excess thiourea. The adsorption performance of MoS2 adsorbent for methylene blue (MB) in azo dye wastewater was studied. The morphology, crystal phase, and microstructure of nano MoS2 samples were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. The effects of adsorption isotherm, kinetics, different hydrothermal time, and pH on the adsorption experiment were studied. The results showed that the MoS2 adsorbent with a hydrothermal time of 1 h had good adsorption properties for MB. The adsorption data accord with the Langmuir isotherm model, and the maximum adsorption capacity of MoS2 adsorbent is 200 mg/g, and the adsorption kinetics agrees well with the pseudo two-level model. The removal rate of MB is not significantly affected by the pH values. The large pH range can still maintain the removal rate above 93.47%, and the regeneration and recovery properties of MoS2 were also explored. Finally, the adsorption mechanism of MoS2 on MB is discussed.

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“…These hazardous substances are strictly controlled to prevent their dumping into the aquatic environment and limit their carcinogenic and mutagenic potential impacts on biotope, animals and human beings [3,4]. For example, methylene blue (MB) is one of the synthetic cationic dyes the most extensively employed in various industries such as dyeing stuff, papermaking, pesticides, cosmetics and others, due to its great water solubility and color stability [5,6]. Being non-biodegradable, having carcinogenic and mutagenic effects, it may cause serious damages to human health.…”

Section: Introductionmentioning

confidence: 99%

A biogenic tunable sorbent produced from upcycling of aquatic biota-based materials functionalized with methylene blue dye for the removal of chromium(VI) ions

Elwakeel

Elgarahy

Guibal³

2021

Journal of Environmental Chemical Engineering

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The valorization of algal biomass and bi-valve shells allows synthesizing, in the presence of urea, a sorbent highly efficient for methylene blue (MB) sorption (sorption capacity: 1.5 mmol MB g − 1 at pH 5.8). The dye-functionalized sorbent shows enhanced sorption properties for Cr(VI) recovery at pH 3. The sorption isotherm is fitted by the Langmuir equation: maximum sorption capacity reaches 8.53 mmol Cr g − 1 (for MB-loading: 1.5 mmol g − 1 ). Different mechanisms may be involved such as the electrostatic attraction of anionic species, che-lation on reactive groups, reduction of Cr(VI) into Cr(III). Under selected experimental conditions, the sorption is achieved within less than 60 m. The kinetic profiles are controlled by the pseudo-second order rate equation. Alkaline NaCl solutions effciently desorb chromate while maintaining a good stability of the dye (negligible release). Therefore, the sorption and desorption performances are maintained remarkably stable for at least 5 sorption/desorption cycles. The sorbent is successfully applied for chromate recovery from Cr(VI)-spiked solu-tions (tap water and wastewater from petrochemical unit) with limited loss in sorption performances. The sor-bent is characterized by BET, TGA, FTIR, SEM, EDX and zetametry to help in the understanding of binding mechanisms and sorption performances.

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Methylene blue adsorption by timbaúva (Enterolobium contortisiliquum)-derived materials

Cited by 18 publications

References 64 publications

Sewage Sludge Activated Carbon as an Adsorbent and Catalytic Support: Evaluation of Nitrate Removal and Suzuki‐Miyaura Cross‐Coupling

Sewage Sludge Activated Carbon as an Adsorbent and Catalytic Support: Evaluation of Nitrate Removal and Suzuki‐Miyaura Cross‐Coupling

Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials

A biogenic tunable sorbent produced from upcycling of aquatic biota-based materials functionalized with methylene blue dye for the removal of chromium(VI) ions

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