New carbon composite adsorbents for the removal of textile dyes from aqueous solutions: Kinetic, equilibrium, and thermodynamic studies

Santos, Davis Castro dos; Adebayo, Matthew A.; Pereira, Simone de Fátima Pinheiro; Prola, Liziê Daniela Tentler; Cataluña, Renato; Lima, Éder C.; Saucier, Caroline; Gally, Caline R.; Machado, Fernando Machado

doi:10.1007/s11814-014-0086-3

Cited by 56 publications

(44 citation statements)

References 49 publications

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“…Prior analysis, a 200.0 mg of ASP was degassed at 150˚C for 3 h in a vacuum. The N 2 isotherms were carried out at −196˚C [35].…”

Section: Biosorbent Characterizationmentioning

confidence: 99%

“…The concentrations of the effluent components are given in Table 1. Between 10 and 60% [13] of synthetic dyes and almost all the secondary chemicals remain in the spent dye bath, and their compositions undergo between 5-fold and 30-fold dilutions during consecutive washing and rinsing steps [1,13,15,20,35,36,42,48].…”

Section: Simulated Dye-house Effluentsmentioning

confidence: 99%

“…According to general-order kinetic model, the order of adsorption process must be of the same trend as that of a chemical reaction in which the order of reaction is determined experimentally [13,15,35,36,42,48,51] and not predetermined by a model. In this manuscript, the order (n) obtained for the kinetics at 50.0 and 100.0 mg L −1 are 2.131 and 2.100, respectively.…”

Section: Kinetic Studies and Effect Of Contact Timementioning

confidence: 99%

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Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions

Bazzo

Adebayo

Dias

et al. 2016

Desalination and Water Treatment

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2015): Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions, Desalination and Water Treatment,This study presents removal of crystal violet (CV) dye from aqueous solutions using solid food waste, avocado kernel seed powder (ASP). ASP was used in the native form for biosorption study. The effects of different experimental conditions such as pH of the solution, initial dye concentration, contact time, and temperature were investigated using batch study. Maximum removal of CV (95.9 mg g −1 ) by ASP (100 mg) was observed at pH 7 and 55˚C. The kinetics data were evaluated using pseudo-first-order, pseudo-second-order, and general-order kinetic adsorption models. The general-order kinetic adsorption model gave the best description of the biosorption kinetic of CV onto ASP biosorbent. Similarly, the intraparticle diffusion plots showed three linear portions during biosorption process. Freundlich, Langmuir, and Liu models were used to analyze the isothermal data; Liu equilibrium model gave the best fit of the isothermal data of CV biosorption onto ASP. The calculations from thermodynamic studies showed that CV biosorption onto ASP was an exothermic process and a feasible process. The combined data showed that avocado seed powder could be efficiently utilized for the treatment of dyes-rich wastewaters.

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“…Prior analysis, a 200.0 mg of ASP was degassed at 150˚C for 3 h in a vacuum. The N 2 isotherms were carried out at −196˚C [35].…”

Section: Biosorbent Characterizationmentioning

confidence: 99%

Section: Simulated Dye-house Effluentsmentioning

confidence: 99%

Section: Kinetic Studies and Effect Of Contact Timementioning

confidence: 99%

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Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions

Bazzo

Adebayo

Dias

et al. 2016

Desalination and Water Treatment

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“…A lot of works indicate scientists interest of other colorants adsorption on carbon-metal composites, e.g. : orange II [6], methyl orange [7,16], Congo red and indigo carmine [12], reactive orange 16 and reactive red 120 [17].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

Jedynak¹

2017

Eng. Prot. Environ.

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Adsorpcja błękitu metylenowego i zieleni malachitowej z roztworów wodnych na mezoporowatych kompozytach węglowo-niklowych i węglowo-cynkowychIn this work adsorption of methylene blue and malachite green on mesoporous carbon-nickel and carbon-zinc composites (ST-A-Ni, ST-A-Ni(NO3)2-imp and ST-A-Zn, ST-A-Zn(NO3)2-imp) were investigated. These materials were obtained by the soft-templating method in presence of various precursors containing nickel or zinc. Nanoparticles of nickel or zinc and solutions of nickel nitrate(V) or zinc nitrate(V) were used as a source of nickel and zinc.Low-temperature nitrogen adsorption isotherms were determined for investigated materials and they were used for porous structure parameters calculation. . Participation of mesoporosity in the total porosity of carbon composites is from approx. 44% to approx. 78%. This means that studied carbons are in fact mesoporous materials, with considerable domination of mesoporosity over the microporosity. The exception is composite ST-A-Zn were the microporosity value is a little bit higher than mesoporosity. The mesopores dimension for the maximum of the distribution function (in the range of mesopores) was determined by Kruk-Jaroniec-Sayari (KJS) method. This dimension was approx. 7 nm for all investigated adsorbents.SEM photos confirmed the presence of ordered mesopores, particularly in materials obtained as a result of zinc nitrate impregnation. Also the presence of nickel nanoparticles, with different dimensions and shapes (ST-A-Ni), was confirmed by SEM photos.The concentrations of adsorbates, before and after adsorption, were determined by spectrophotometric method. Adsorption experiments were carried out at 25°C temperature. The adsorption equilibrium for investigated in this work mesoporous compositions (carbon--metal-composite -colorant solution) was settled after 90 minutes (ST-A-Ni(NO3)2-imp-MB and ST-A-Zn(NO3)2-imp-MB), after 120 minutes (ST-A-Ni-MB), after 240 minutes (ST-A-Ni-MG) and for the rest of investigated compositions after 360 minutes. The studies of adsorption process velocity showed that in most cases adsorption kinetics proceeded according to pseudo II-order reaction model. Only in one case according to pseudo I-order reaction model: for ST-A-Zn (malachite green). Obtained adsorption isotherms were substituted into the Langmuir equation and Freundlich equation. Adsorption process of methylene blue and malachite green on all studied carbon-metal composites proceed in accordance to adsorption model described by Langmuir equation. Adsorption ability of studied mesoporous carbon materials is significantly higher for methylene blue than for malachite green. The best adsorbent for methylene blue was carbon ST-A-Zn(NO3)2-imp (qm = 104.17 mg/g), the worst K. Jedynak 44 adsorbent was carbon ST-A-Zn (qm = 6.65 mg/g). In the case of malachite green the best adsorbent was carbon ST-A-Ni (qm = 58.82 mg/g) and the worst adsorbent was carbon ST-A-Zn (qm = 4.25 mg/g). On the basis of K constant from Langmuir equation the value of free ent...

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“…Secondly, the authors think that the mechanism of adsorption does not just agree with a simple kinetic equation such as pseudo-first-order, pseudo-secondorder, Elovich chemisorption model, and other kinetic models [16]. A given well-established mechanism of adsorption should be certified after the use of several analytical techniques (FTIR, SEM, N 2 adsorption/ desorption curves, Raman spectroscopy, TGA/DTA, DSC, NMR of 29 Si and 13 C at solid state, XRD, pH pzc , CHN analysis, and solution calorimetry analysis) to support the adsorption experimental data (kinetics and equilibrium) [17][18][19][20][21][22][23][24][25], instead of establishing a mechanism of adsorption on a simple kinetic model [17][18][19][20][21][22][23][24][25], as many authors have done in the adsorption studies reported in the literature [16].…”

mentioning

confidence: 99%

Comments on the paper: a critical review of the applicability of Avrami fractional kinetic equation in adsorption-based water treatment studies

Lima

Cestari

Adebayo

2015

Desalination and Water Treatment

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New carbon composite adsorbents for the removal of textile dyes from aqueous solutions: Kinetic, equilibrium, and thermodynamic studies

Cited by 56 publications

References 49 publications

Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions

Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

Comments on the paper: a critical review of the applicability of Avrami fractional kinetic equation in adsorption-based water treatment studies

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