Application of Lolium multiflorum as an Efficient Raw Material in the Production of Adsorbent for Removal of Methylene Blue

Silva, Elenara Oliveira da; Filho, Alaor Valério; Araujo, Emanuelle Butato de; Andrade, Taís Douglas; Santos, Maele Costa dos; Zottis, Ricardo; Rosa, Gabriela Silveira da; Almeida, André Ricardo Felkl de

doi:10.3390/c9020044

Cited by 5 publications

(3 citation statements)

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“…The modification in the bands indicates that the activation was able to modify chemical characteristics of the adsorbents. Furthermore, functional groups on the bioadsorbent surface often play a major role in the adsorption of various contaminants [ 26 ]. The main mechanism of MB adsorption is based on the electrostatic interaction between the dye molecules and the negatively charged C=O group.…”

Section: Resultsmentioning

confidence: 99%

“…The increase in the intensity of the peak at 20.13° for JB-NaOH can be attributed to the alkaline treatment, causing an increase in the crystallinity of the fibers due to the hydrolyzation of the amorphous regions during the NaOH treatment [ 48 ]. The absence of other peaks confirms that the three samples have a predominantly amorphous structure, which may favor the adsorption of methylene blue dye [ 26 , 49 , 50 ].…”

Section: Resultsmentioning

confidence: 99%

“…The textile industry is responsible for a high percentage of this pollution, discarding high amounts of pigments in watercourses [ 11 , 25 ]. One of the most popular textile contaminants is the cationic dye methylene blue (MB) whose process of degradation is complex and has high toxicity [ 26 ]. Among the processes used in the removal of contaminants from effluents, adsorption is one of the most efficient [ 25 , 27 , 28 , 29 ], comprising a surface phenomenon that consists in transferring the contaminants from an aqueous solution to a solid phase.…”

Section: Introductionmentioning

confidence: 99%

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Novel Adsorbent Material from Plinia cauliflora for Removal of Cationic Dye from Aqueous Solution

et al. 2023

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The food industry is responsible for the generation of large amounts of organic residues, which can lead to negative environmental and economic impacts when incorrectly disposed of. The jaboticaba peel is an example of organic waste, widely used in industry due to its organoleptic characteristcs. In this study, residues collected during the extraction of bioactive compounds from jaboticaba bark (JB) were chemically activated with H3PO4 and NaOH and used to develop a low-cost adsorbent material for the removal of the cationic dye methylene blue (MB). For all adsorbents, the batch tests were carried out with the adsorbent dosage of 0.5 g L−1 and neutral pH, previously determined by 22 factorial design. In the kinetics tests, JB and JB-NaOH presented a fast adsorption rate, reaching equilibrium in 30 min. For JB-H3PO4, the equilibrium was reached in 60 min. JB equilibrium data were best represented by the Langmuir model and JB-NaOH and JB-H3PO4 data by the Freundlich model. The maximum adsorption capacities from JB, JB-NaOH, and JB-H3PO4 were 305.81 mg g−1, 241.10 mg g−1, and 122.72 mg g−1, respectively. The results indicate that chemical activations promoted an increase in the volume of large pores but interacted with functional groups responsible for MB adsorption. Therefore, JB has the highest adsorption capacity, thus presenting as a low-cost and sustainable alternative to add value to the product, and it also contributes to water decontamination studies, resulting in a zero-waste approach.

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Section: Resultsmentioning

confidence: 99%