Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies

Assémian, Alain Stéphane; Kouassi, Konan Edmond; Adouby, Kopoin; Drogui, Patrick; Boa, David

doi:10.5155/eurjchem.9.4.311-316.1736

Cited by 12 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equations (6), and (7) give the expressions of the nonlinear forms of Langmuir and Freundlich adsorption models, respectively: (6) (7) Where C e (mg/L) is the equilibrium methylene blue concentration; Qe (mg/g) is the amount of methylene blue adsorbed at equilibrium, K L (L/mg) is the Langmuir constant, K F is the Freundlich constant, Q max (mg/g) is the maximum adsorption capacity, and, n is the Freundlich model exponent.…”

Section: Adsorption Isotherm Modelsmentioning

confidence: 99%

“…However, methylene blue removal from wastewater is important. Thus, several methods such as filtration, electrocoagulation processes, oxidation, and adsorption have been developed to treat dyestuffs wastewater [6][7][8][9][10]. Among them, "the adsorption technique is well used due to its simple operation conditions and chemical removal efficacy.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Methylene Blue from Industrial Effluents Using Corncob Activated Carbon

Kouassi

Blonde

N’Goran

et al. 2022

IRJPAC

View full text Add to dashboard Cite

Water contamination by methylene blue (MB) is a threat to human health and aquatic biota due to its toxicity, persistence, and non-biodegradability. However, there is little data available in the literature on the methylene blue removal approach from industrial effluents by corncob-activated carbon. The purpose of this study was to investigate the adsorption of methylene blue from aqueous solution and industrial effluents by corncob-activated carbon. The methylene blue adsorption capacities of corncob-activated carbon were investigated by batch adsorption experiments both in synthetic solutions and industrial effluents. The optimum pH value was 10.3 with a removal percentage of 93.4 %. Methylene blue adsorption by activated carbon followed second-order kinetics and was well fitted by the Langmuir model. The maximum adsorption capacity (Qmax) value was 11.36 mg/g. This study revealed that corncob-activated carbon has successfully removed methylene blue from industrial effluents, with percentages ranging from 65.14 %, and 76.28 %. The excellent methylene blue dye removal efficiency with corncob activated from industry effluents suggests its promising potential in remediating methylene blue contaminated wastewater.

show abstract

Section: Adsorption Isotherm Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of Methylene Blue from Industrial Effluents Using Corncob Activated Carbon

Kouassi

Blonde

N’Goran

et al. 2022

IRJPAC

View full text Add to dashboard Cite

show abstract

“…It is noteworthy that methylene blue is known to be a redox indicator [48]; Poteet et al [49] reported two values for the redox potentials of reactive groups on MB: 0.5 V and -0.108 V. Methylene blue is oxidized to form leucomethylene blue (colorless). Its pK a value is largely debated with data reporting pK a close to 0 [50] and up to 3.8 [51,52]. The pK a values of mannuronic and guluronic acid in chitosan have been reported close to 3.38 and 3.65, respectively [53].…”

Section: Ph Pzcmentioning

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

View full text Add to dashboard Cite

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.

show abstract

“…Kinetics is an important aspect of any reaction; especially for organic reactions [11][12][13][14][15]. The kinetics give us important data about the reaction.…”

Section: The Rate Law For Cannizzaro Reactionmentioning

confidence: 99%

Theoretical DFT study of Cannizzaro reaction mechanism: A mini perspective

et al. 2020

View full text Add to dashboard Cite

In regards to the Cannizzaro reaction and its peculiar mechanism, some researchers have presented a free radical mechanism for the Cannizzaro reaction, while others have found that it is feasible through an ionic mechanism, but the actual mechanism has not been finalized yet. The researchers have given the proof of both the mechanisms through their papers published. Actually, Cannizzaro reaction may occur through both mechanisms depending on both molecular structure and different conditions which are yet to be explained. Recently published papers describe that free radical mechanism occurs only in a heterogeneous medium, while an ionic mechanism occurs in a homogeneous medium. We revealed no explanation of the molecular structure-based reason, responsible for a radical or an ionic mechanism. The present paper reviews not only homogeneous/heterogeneous medium conditions but also molecular structure-based facts, which may be responsible for the Cannizzaro reaction to occur through the radical or ionic mechanism, and that may be acceptable to the scientific society. Besides, Density Functional Theory study using Gaussian software was also involved in the explanation of the molecular structure, responsible for one of the two mechanisms. Also, the present paper specifies all points related to future perspectives on which additional studies are required to understand the actual mechanism with a definite molecular structure in the different reaction media.

show abstract

Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies

Cited by 12 publications

References 32 publications

Removal of Methylene Blue from Industrial Effluents Using Corncob Activated Carbon

Removal of Methylene Blue from Industrial Effluents Using Corncob Activated Carbon

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

Theoretical DFT study of Cannizzaro reaction mechanism: A mini perspective

Contact Info

Product

Resources

About