Evaluation of the Adsorption Process Using Low Cost Agroindustry Residue for the Removal of Methylene Blue Dye

Oliveira, Fabiano Mendonça de; Sousa, Priscila Afonso Rodrigues de; Melo, Edmar Isaías de; Coelho, Luciana Melo

doi:10.17807/orbital.v12i2.1422

Cited by 5 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Subclass 1 indicates that there is no monolayer formation and the adsorption sites are not completely occupied or that their availability decreased with increasing solute concentration [ 42 , 65 ]. Type L1 isotherms were observed for the adsorption of acid red 97 dye by spores of the fungus Beauveria bassiana [ 14 ], azo dyes (TY and amaranth) by chitosan films [ 66 ] and in the removal of methylene blue dye per green coconut mesocarp [ 15 ]. Subclass 2, on the other hand, indicates that there is formation of monolayer in adsorption and complete saturation or unavailability of adsorption sites in certain concentrations [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

“…However, due to the new challenges for the effective removal of emerging contaminants, different materials have been used in natural or synthesized form for this purpose. In this case, materials of natural origin [ 12 ], industrial waste [ 10 , 13 , 14 , 15 ] and composite materials can be mentioned [ 1 , 2 , 3 , 7 , 16 , 17 , 18 ]. Dyes are seen as a good model system for the evaluation of new adsorbent materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis, characterization and application of new adsorbent composites based on sol-gel/chitosan for the removal of soluble substance in water

Mello

Machado

Crestani

et al. 2022

Heliyon

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and application of new adsorbent composites based on sol-gel/chitosan for the removal of soluble substance in water

Mello

Machado

Crestani

et al. 2022

Heliyon

View full text Add to dashboard Cite

“…In most works, three kinetic models are used to describe the adsorption process, which correspond to the pseudo-first-order, pseu-do-second-order, and Elovich models (De Oliveira et al, 2018;Fooladgar et al, 2019;Labaran et al, 2019;Mamaní et al, 2019;Ahmad et al, 2020). However, few works are using mathematical models in adsorption processes with the same adsorbent chemically activated with different chemical agents.…”

Section: Comparison Of the Adsorption Kinetics Of Methylene Blue Usin...mentioning

confidence: 99%

“…The FT-IR spectra, as shown in Figure 3, show the presence of surface functional groups of the charcoals in nature and treated with different activating agents, which do not show significant differences. The highest intensity peaks 1045.66 and 1052.67 cm -1 can be attributed to the C -O stretching vibration in acids, alcohols, phenols, ethers, and esters (Tongpoothorn et al, 2011;Muniandy et al, 2014;De Oliveira et al, 2018).…”

Section: Characterization Of the Husk And Ashesmentioning

confidence: 99%

Comparison of the adsorption kinetics of methylene blue using rice husk ash activated with different chemical agents

Farias

Demarco

Afonso

et al. 2022

Rev. Bras. Ciênc. Ambient.

View full text Add to dashboard Cite

Activated carbon is widely used in several industrial sectors and has a high production cost. To reduce costs, different materials have been studied, for example, rice husks (RH). RH is an abundant, low-cost residue of the agricultural sector and can be used to generate energy due to its high calorific value. However, burning husk generates waste, the ashes. Thus, the objective of this work was to optimize the synthesis of activated carbon using pre-carbonized RH with different chemical agents as activators (KOH, NaOH, NaCl, H₂SO₄, and Na₂CO₃), at different particle sizes. Subsequently, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and energy dispersive spectroscopy (EDS) were used to characterize the materials. Of these, KOH was the best activating agent. The adsorption kinetics for the adsorbents was 30 min, reaching equilibrium after 70 min. Of the three fitted kinetic models, pseudo-second-order and Elovich best fit the data. The FT-IR shows that the adsorbents have oxygenated surface groups such as alcohol, ester, ether, and phenol. From the point of zero charge, the predominance of negative charges on the surface of the adsorbents is observed. Therefore, the activated carbon from rice husk ash (RHA) showed potential in the adsorption of the methylene blue dyes.

show abstract

“…A presença dos grupos funcionais de superfície em bioadsorventes tem sido relatada na literatura como sendo os responsáveis pela interação com o MB, desempenhando um importante papel na seletividade e na capacidade de adsorção desses materiais para a remoção do corante em solução aquosa [38][39][40][41][42][43][44][45]. A Tabela 3 resume os principais grupos de superfície envolvidos na adsorção de MB para alguns tipos de bioadsorventes relatados na literatura.…”

Section: Grupos Funcionais De Superfícieunclassified

Remoção do corante azul de metileno de solução aquosa usando biomassa de pele prata de café (coffee silverskin) como bioadsorvente de baixo custo

et al. 2022

View full text Add to dashboard Cite

RESUMO A busca por bioadsorventes eficazes e de baixo custo para a remoção de corantes de efluentes industriais tem despertado a demanda por novas pesquisas a fim de amenizar os impactos negativos causados ao meio ambiente. Nesse sentido, o objetivo do trabalho foi avaliar o potencial da pele prata de café (PPC) como bioadsorvente de baixo custo na remoção do corante azul de metileno (MB) de soluções aquosas por meio dos estudos de cinética e equilíbrio de adsorção. O resíduo foi submetido a caracterizações físico-químicas, área de superfície específica (BET), presença de grupos funcionais (FTIR), análise elementar (CHNS-O), ponto de carga zero (pHPCZ) e cristalinidade (DRX). Os resultados mostraram que a PPC apresentou estrutura preponderantemente amorfa composta por holocelulose (38,36%), lignina (34,97%) e minerais (potássio, cálcio e magnésio). A baixa área de superfície específica (0,383 m2/g) foi compensada pela diversidade de grupos funcionais de superfície contendo oxigênio, confirmados pela predominância de carbono (55,93%), oxigênio (32,91%) e hidrogênio (6,37%). A análise pHPCZ mostrou que o ponto de carga zero da PPC foi de 6,49. O processo de equilíbrio foi atingido em 24 h, propiciando uma cinética retratada pelo modelo Elovich (R2(aj.)= 0,999; χ2= 0,233), o qual apresentou valores de taxas de adsorção inicial (α) e dessorção (β), de 2,405 mg/g.min e 0,587 mg/g, respectivamente. A isoterma que melhor se ajustou aos dados de equilíbrio para o sistema foi a de Langmuir (R2(aj.)= 0,991; χ2= 99,176), indicando adsorção em monocamada. A adsorção de MB pela PPC foi favorável, apresentando fatores de separação (RL) entre 0,58 e 0,03. A capacidade máxima de adsorção da PPC (Qmax= 313,69 mg/g) foi superior a outros tipos de adsorventes de baixo custo relatados na literatura, demonstrando assim o seu potencial uso como bioadsorvente para a remoção de corantes catiônicos de solução aquosa.

show abstract

Evaluation of the Adsorption Process Using Low Cost Agroindustry Residue for the Removal of Methylene Blue Dye

Cited by 5 publications

References 0 publications

Synthesis, characterization and application of new adsorbent composites based on sol-gel/chitosan for the removal of soluble substance in water

Synthesis, characterization and application of new adsorbent composites based on sol-gel/chitosan for the removal of soluble substance in water

Comparison of the adsorption kinetics of methylene blue using rice husk ash activated with different chemical agents

Remoção do corante azul de metileno de solução aquosa usando biomassa de pele prata de café (coffee silverskin) como bioadsorvente de baixo custo

Contact Info

Product

Resources

About