Textile dye removal from aqueous solutions by malt bagasse: Isotherm, kinetic and thermodynamic studies

Fontana, Klaiani Bez; Chaves, Enaura Helena Brandão; Sanchez, Jefferson D.S.; Watanabe, Erica R. L. R.; Pietrobelli, Juliana Martins Teixeira de Abreu; Lenzi, Giane Gonçalves

doi:10.1016/j.ecoenv.2015.11.012

Cited by 101 publications

(41 citation statements)

References 36 publications

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“…Solution pH is an important regulatory factor in the dye adsorption process, influencing the surface charge of the adsorbent and adsorbate behaviour [19]. Sorption capacity, as well as the nature of the dye-sorbent interaction, can greatly be reflected by the pH of the solution.…”

Section: Effect Of Ph Temperature and Thermodynamic Propertiesmentioning

confidence: 99%

Biosorption of acid yellow-99 using mango (Mangifera indica) leaf powder, an economic agricultural waste

et al. 2019

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The competency of mango leaf powder (MLP), an eco-friendly and cost-effective adsorbent, has been extensively studied for the removal of a carcinogenic azo dye, acid yellow-99 (AY-99), from simulated wastewater on principal interest in combating water pollution and to comprehend the mechanisms of the phenomenon. Optimum dye adsorption occurs at pH 2.5, whereas the temperature has no significant effect. MLP can effectively adsorb 708.15 mg g −1 of dye as a function of the initial dye concentration with excellent fitting to the Langmuir isotherm model illustrating monolayer adsorption. The process is rather swift to be completed within ~ 160 min following film diffusion model and pseudo-second-order rate kinetics. The magnitude of hindrance exerted by NaCl in dye adsorption is found to be quite insignificant. The biomass is competent enough for anionic dye decolourization in the binary mixture (AY-99 + AR-88) determined by the first-order derivative spectrophotometric method. Thermodynamically the process is spontaneous, endothermic and entropy-driven. Zeta potential, XRD, SEM-EDXA and X-ray elemental mapping analyses have been used to assess the morphological changes and the mechanisms of dye interaction with MLP. FTIR spectroscopy and chemical modification of functional groups of biomass establish the major contribution of hydroxyl groups for effective dye decolourization through complexation and electrostatic interactions.

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Section: Effect Of Ph Temperature and Thermodynamic Propertiesmentioning

confidence: 99%

Biosorption of acid yellow-99 using mango (Mangifera indica) leaf powder, an economic agricultural waste

et al. 2019

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“…Os resultados mostram que há poucos poros no bagaço de malte, o que justifica a sua baixa área superficial e encontra correspondência com outros estudos realizados com bagaço de malte (Fontana et al, 2016). A Figura 1 apresenta as micrografias obtidas por MEV para ampliação de 160 e 499 vezes.…”

Section: Ufscar -São Carlos -Sp 16 a 19 De Julho De 2017unclassified

Utilização De Resíduo Da Indústria Cervejeira Na Biossorção De Íons Metálicos Presentes Em Águas Subterrâneas

Cechinel¹,

Peterson²

2017

Blucher Chemical Engineering Proceedings

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RESUMO -Amostras de águas subterrâneas foram coletadas e caracterizadas em análises físico-químicas, verificando-se a presença de íons Fe(II) e Mn(II) acima dos valores máximos permitidos (VMP) pela legislação brasileira para consumo humano. Foram realizados estudos de biossorção utilizando-se bagaço de malte, em batelada, variando-se a dosagem de biomassa. Ensaios cinéticos mostraram que o equilíbrio de biossorção é atingido em até 480 min, com percentuais de remoção de aproximadamente 87 % e 71 % para Fe 2+ e Mn 2+ , respectivamente. A capacidade máxima de biossorção para o Fe 2+ e Mn 2+ foi de 1,2 mg/g e 0,6 mg/g, respectivamente. O modelo cinético de pseudo-segunda ordem apresentou melhor ajuste aos dados experimentais. INTRODUÇÃOA biossorção tem sido considerada uma alternativa promissora quando comparada a outras tecnologias tradicionais de tratamento de águas, uma vez que é de baixo custo e ambientalmente amigável, especialmente quando uma biomassa natural é utilizada (Ibrahim, 2011). Muitos materiais de origem biológica já foram investigados na remoção de poluentes de águas contaminadas. A aplicação de resíduos de biomassa microbiana e da indústria de alimentos como biossorventes vem ganhando destaque devido ao grande volume produzido (Wang e Chen, 2006) e por ser um material de baixo custo. Dentre esses materiais, destaca-se o bagaço de malte, subproduto da indústria cervejeira, que é composto pela casca do malte, fragmentos da camada de aleurona, plúmula, restos de parede celular e proteína coagulada. Atualmente, em função de seu alto teor de fibras, o resíduo do malte é destinado, majoritariamente, à nutrição animal (Aquarone et al., 2001). Como o setor cervejeiro no Brasil, principalmente o artesanal, vem crescendo significativamente nos últimos 10 anos, conferir um valor tecnológico a essa biomassa pode ser uma alternativa interessante, visto que há uma produção expressiva do resíduo, podendo chegar a 20 kg de bagaço de malte para cada 100 L de cerveja fabricada (Santos e Ribeiro, 2012).A presença íons em águas subterrâneas, mesmo que em pequenas quantidades, afetam a utilidade da água para algumas finalidades domésticas e industriais. Além disso, por se tratar de uma região carbonífera, a presença de metais como Fe 2+ e Mn 2+ pode estar relacionada à diluição de águas oriundas da drenagem ácida de mina (DAM) nas fontes de água (Akcil e Koldas, 2006).

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“…We investigated an experimental scenario where the diffusion may play an important role, that is, the sorption process in absence of agitation. For this case, we consider that the Pb(II) diffusion in the bulk was governed by (13) and…”

Section: Resultsmentioning

confidence: 99%

“…The absorbance at 2928 and 2845 cm −1 is attributed to -CH 2 and -CH 3 groups. Bands at around 1732 and 1656 cm −1 are signatures of C=O stretching vibrations [13]. The peak at 1732 cm −1 Pb(II)-loaded shows an intensity increase when compared with malt bagasse unloaded.…”

Section: Diffusionmentioning

confidence: 97%

“…A potentially new and low cost biosorbent is malt bagasse, the main subproduct obtained from the beer production process; around 14-20 kg of malt bagasse is generally produced for each 100 L of beer [12]. For textile removal from aqueous solution, malt bagasse was found to be a good biosorbent due to the removal capacity, low cost, and possibility of use without previous treatment [13].…”

Section: Introductionmentioning

confidence: 99%

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Biosorption and Diffusion Modeling of Pb(II) by Malt Bagasse

Fontana

Lenzi

Watanabe

et al. 2016

International Journal of Chemical Engineering

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The removal of Pb(II) from water by biosorption processes onto malt bagasse was investigated and the kinetic and thermodynamic parameters were obtained; additionally a diffusion modeling was proposed. The characterization of malt bagasse was performed by FTIR and SEM/EDS. The experiments were conducted in batch system and an experimental design based response surface methodology was applied for agitation speed and pH optimization. The kinetics of biosorption followed pseudo-second-order model and the temperature of the process affected the biosorption capacity. Isotherm models of Langmuir, Freundlich, and Elovich were applied and the Langmuir model showed better fit and the estimated biosorption capacity was 29.1 mg g−1. The negative values obtained for ΔG° and positive values of ΔH° confirm, respectively, the spontaneous and endothermic nature of the process. The diffusion modeling was performed based on experiments in the absence of agitation to investigate the influence of the biosorbent on the sorption process of Pb(II) ions.

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Textile dye removal from aqueous solutions by malt bagasse: Isotherm, kinetic and thermodynamic studies

Cited by 101 publications

References 36 publications

Biosorption of acid yellow-99 using mango (Mangifera indica) leaf powder, an economic agricultural waste

Biosorption of acid yellow-99 using mango (Mangifera indica) leaf powder, an economic agricultural waste

Utilização De Resíduo Da Indústria Cervejeira Na Biossorção De Íons Metálicos Presentes Em Águas Subterrâneas

Biosorption and Diffusion Modeling of Pb(II) by Malt Bagasse

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