Removal of various dyes from aqueous media onto polymeric gels by adsorption process: Their kinetics and thermodynamics

Malana, Muhammad Aslam; Ijaz, Sana; Ashiq, Muhammad Naeem

doi:10.1016/j.desal.2010.06.066

Cited by 76 publications

(35 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results also demonstrate the formation of monolayer coverage of dye molecule at the outer surface of activated carbon. A similar observation was reported by the adsorption of acid orange 10 dye onto activated carbons prepared from agricultural waste bagasse [23] and by the adsorption of direct dyes on activated carbon prepared from sawdust [24] and adsorption of Congo Red dye on activated carbon from coir pith [25].…”

Section: Langmuir Isothermsupporting

confidence: 63%

Factors Affecting the Removal of a Basic and an Azo Dye From Artificial Solutions by Adsorption Using Activated Carbon

Albroomi¹,

Elsayed²,

Baraka³

et al. 2014

J. Turk. Chem. Soc., Sect. A: Chem.

View full text Add to dashboard Cite

Decolourisation of wastewater, particularly from textile industries, is one of the major environmental concerns these days. Current methods for removing dyes from wastewater are costly and cannot effectively be used to treat wide range of such wastewater. This work describes the use of commercially available granular activated carbon (GAC) as an efficient adsorbent material for dyes' removal. Aqueous solutions of various concentrations of the basic dye Methylene Blue (MB) and the azo-dye Tartrazine at 5-20 mg.L -1 and 10-100 mg.L -1 , respectively, were shaken with certain amount of GAC to determine the adsorption capacity and removal efficiencies. The effects of adsorbent dose, initial pH, initial dye concentration, agitation speed, and contact time on dyes' removal efficiencies have been studied. Maximum dye concentration was removed from the solution within 60-90 min. after the beginning of every experiment. Adsorption parameters were found to fit well into Langmuir and Freundlich adsorption isotherm models with correlation coefficient (R 2 > 0.99) in the concentration range of MB and TZ studied.

show abstract

Section: Langmuir Isothermsupporting

confidence: 63%

Factors Affecting the Removal of a Basic and an Azo Dye From Artificial Solutions by Adsorption Using Activated Carbon

Albroomi¹,

Elsayed²,

Baraka³

et al. 2014

J. Turk. Chem. Soc., Sect. A: Chem.

View full text Add to dashboard Cite

show abstract

“…Estos dos comportamientos sugieren la naturaleza endotérmica del proceso de adsorción [18]. Los valores negativos obtenidos para ΔG° confirman la factibilidad del proceso y su naturaleza espontánea.…”

Section: Discussionunclassified

Equilibrio, termodinámica y modelos cinéticos en la adsorción de Rojo 40 sobre tuza de maíz

Figueroa

Moreno

Hormaza

2015

rev.ing.univ.Medellin

View full text Add to dashboard Cite

ResumenLa adsorción es un método ampliamente utilizado para el tratamiento de contaminantes disueltos. Diversos residuos agroindustriales han sido explorados como potenciales adsorbentes, mostrando alta eficiencia en la eliminación de colorantes. Para el escalado de este proceso se requieren modelos cinéticos y de equilibrio para cada pareja adsorbato-adsorbente. En este trabajo se evaluaron el equilibrio, la cinética y la termodinámica del sistema tuza de maíz-rojo 40 bajo sistema discontinuo a pH = 2.0 a las temperaturas de 25, 40 y 55 °C. Los modelos de Langmuir, Freundlich y Temkin fueron seleccionados para la representación de las isotermas, en tanto que las ecuaciones de Lagergren, Ho y Elovich, para la cinética del proceso. El modelo de Freundlich presentó el mejor ajuste a las isotermas, la cinética de adsorción fue mejor descrita por la ecuación de Ho y los valores para la energía libre de Gibbs, y la entropía señalaron la espontaneidad y factibilidad del proceso.Palabras clave: isotermas de adsorción, cinética, rojo 40, adsorbentes de bajo costo, tuza de maíz.

show abstract

“…6) [25,26], pseudo-second-order (Eq. 7) [27,28], and Bangham models (Eq. 8) [29,30], were used to investigate the adsorption process of MB on TSC-SA/MC.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Adsorption of cationic dye from water using thermo-sensitive colloid composed of methylcellulose and sodium alginate

Jiang

Zhang

et al. 2015

Colloid Polym Sci

View full text Add to dashboard Cite

The adsorption behaviors of methylene blue (MB) by a thermo-sensitive colloid composed of sodium alginate and methylcellulose (TSC-SA/MC) have been investigated. The results showed that the dosage of SA had an important effect on the adsorption capability of TSC-SA/MC. The maximum of adsorption capability appeared at m SA /m MC of 0.3:1, and among all the differences in adsorption capability between 30 and 60°C, 61 mg·g −1 was the maximum adsorption difference appeared at m SA /m MC of 0.3:1. The adsorption capability of TSC-SA/MC increased with pH from 2 to 11, decreased with temperature from 30 to 70°C. The adsorption data were not well fitted by Langmuir, Freundlich, Temkin, or DubininRadushkevich model, suggesting the adsorption of MB on TSC-SA/MC did not belong to a single adsorption style. The maximum adsorption capacity of adsorption isotherm data was 1098.5 mg·g −1 . The adsorption of MB by TSC-SA/MC fitted the pseudo-second-order model, and the main resistances for MB adsorption by TSC-SA/MC involved the external mass transfer, intraparticle mass transfer, and sorption on active site. The ΔH of MB adsorption by TSC-SA/MC was −48.26 kJ·mol −1 , and the ΔS was −143.00 J·K −1 ·mol −1 . The ΔG indicated that the adsorption could change from a spontaneous process to a nonspontaneous process with temperature increase. Both physical and chemical adsorption took place in the MB adsorption process. Fourier transform infrared spectroscopy (FTIR) spectra of filter cakes of TSC-SA/MC before and after adsorption of MB showed that the adsorption process for MB by TSC-SA/MC had a quite complicated mechanism, and the successful adsorption involved many chemical groups.

show abstract

Removal of various dyes from aqueous media onto polymeric gels by adsorption process: Their kinetics and thermodynamics

Cited by 76 publications

References 42 publications

Factors Affecting the Removal of a Basic and an Azo Dye From Artificial Solutions by Adsorption Using Activated Carbon

Factors Affecting the Removal of a Basic and an Azo Dye From Artificial Solutions by Adsorption Using Activated Carbon

Equilibrio, termodinámica y modelos cinéticos en la adsorción de Rojo 40 sobre tuza de maíz

Adsorption of cationic dye from water using thermo-sensitive colloid composed of methylcellulose and sodium alginate

Contact Info

Product

Resources

About