Equilibrium, kinetic and thermodynamic studies on the biosorption of reactive acid dye on Enteromorpha flexuosa and Gracilaria corticata

Sivasamy, A.; Nethaji, S.; Nisha, Laali

doi:10.1007/s11356-011-0666-2

Cited by 22 publications

(2 citation statements)

References 19 publications

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“…2), indicating that at pH < 2.80, the surface of the peat would be positively charged and at pH > 2.80, it would be negatively charged. The pH pzc of peat experimentally determined in this research is similar to that of algal biomass, 35 which also has a high organic matter content. Above the pH pzc , the pH of the peat suspension if greater than the initial pH, suggesting that there is a tendency for the peat surface to become negatively charged with exposed hydroxyl groups, promoting the adsorption of cationic dyes, such as BG.…”

Section: Characterization and Surface Chemistry Of Peatsupporting

confidence: 64%

Effective adsorption of toxic brilliant green from aqueous solution using peat of Brunei Darussalam: isotherms, thermodynamics, kinetics and regeneration studies

2015

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Section: Characterization and Surface Chemistry Of Peatsupporting

confidence: 64%

Effective adsorption of toxic brilliant green from aqueous solution using peat of Brunei Darussalam: isotherms, thermodynamics, kinetics and regeneration studies

2015

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“…Therefore, laccaic acids could interact with the cell wall material of algae in an analogous way to the non‐covalent interactions with chitosan. Other Gracilaria species have shown potential for the biosorption of dyes from aqueous solution, including the acid dye Benewol Red by G. fisheri , CI Acid Black 1 by G. persica biomass , and the removal of reactive acid dye, methylene blue, and crystal violet by G. corticata . In the case of G. corticata biomass, it was shown that the biosorption mechanism of crystal violet from aqueous solution occurred by electrostatic interactions between the negatively charged seaweed surface and positively charged crystal violet cations .…”

Section: Introductionmentioning

confidence: 99%

Biosorption of lac dye by the red marine alga Gracilaria tenuistipitata: biosorption kinetics, isotherms, and thermodynamic parameters

Chairat

Bremner

2016

Coloration Technology

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The hypothesis that the dried, ground biomass of the red marine alga Gracilaria tenuistipitata could be used for the efficient removal of lac dye from aqueous solution was assessed in this work. The effects of parameters such as initial pH, biosorbent dosage, contact time, initial dye concentration, and temperature on the biosorption capacity of the dye were investigated. Equilibrium data were analysed using Langmuir, Freundlich, and Temkin isotherm models, and the Freundlich model provided the highest coefficient of determination values. Biosorption kinetic data were successfully described with a pseudo-second-order model at initial dye concentrations of 50, 80, 100, and 120 mg l −1 . The thermodynamic parameters of biosorptionenthalpy change (∆H° = −30.64 kJ mol −1 ), free energy change (∆G° = 4.32 kJ mol −1 at 303 K to 7.78 kJ mol −1 at 333 K), and entropy change (∆S° = −115.38 J mol −1 K −1 ) -were determined. The negative value of the enthalpy change and positive values of the free energy change indicate that the biosorption process is exothermic and non-spontaneous. The negative value of the entropy change is consistent with decreased randomness at the solid-liquid interface with dye biosorption. Attenuated total reflectance-Fourier transform infrared spectroscopic analysis confirmed the presence of lac dye on the G. tenuistipitata material. The efficiency of lac dye removal by this biomass material at 20 g l −1 and with an initial dye concentration of 50 mg l −1 in acidic solution was 71%, which indicated its potential usefulness as a new dye biosorbent. Running title: Removal of lac dye by Gracilaria tenuistipitata AbstractThe hypothesis that the dried, ground biomass of the red marine alga Gracilaria tenuistipitata could be used for the efficient removal of lac dye from aqueous solution was assessed in this work. The effects of parameters such as initial pH, biosorbent dosage, contact time, initial dye concentration, and temperature on the biosorption capacity of the dye were investigated. Equilibrium data were analysed using Langmuir, Freundlich, and Temkin isotherm models and the Freundlich model provided the highest coefficient of determination values. Biosorption kinetic data were successfully described with a pseudo-second-order model at initial dye concentrations of 50, 80, 100, and 120 mg l

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Biosorption characteristics of Aspergillus fumigatus for the decolorization of triphenylmethane dye acid violet 49

Chaudhry

Zohaib

Ullah

et al. 2013

Appl Microbiol Biotechnol

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This study focuses on the possible use of Aspergillus fumigatus to remove acid violet 49 dye (AV49) from aqueous solution. In batch biosorption experiments, the highest biosorption efficiency was achieved at pH 3.0, with biosorbent dosage of 3.0 gL(-1) within about 30 min at 40 °C. The Langmuir and Freundlich models were able to describe the biosorption equilibrium of AV49 onto fungal biomass with maximum dye uptake capacity 136.98 mg g(-1). Biosorption followed a pseudo-second-order kinetic model with high correlation coefficients (R (2) > 0.99), and the biosorption rate constants increased with increasing temperature. Thermodynamic parameters indicated that the biosorption process was favorable, spontaneous, and endothermic in nature, with insignificant entropy changes. Fourier transform infrared spectroscopy strongly supported the presence of several functional groups responsible for dye-biosorbent interaction. Fungal biomass was regenerated with 0.1 M sodium hydroxide and could be reused a number of times without significant loss of biosorption activity. The effective decolorization of AV49 in simulated conditions indicated the potential use of biomass for the removal of color contaminants from wastewater.

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Equilibrium, kinetic and thermodynamic studies on the biosorption of reactive acid dye on Enteromorpha flexuosa and Gracilaria corticata

Cited by 22 publications

References 19 publications

Effective adsorption of toxic brilliant green from aqueous solution using peat of Brunei Darussalam: isotherms, thermodynamics, kinetics and regeneration studies

Effective adsorption of toxic brilliant green from aqueous solution using peat of Brunei Darussalam: isotherms, thermodynamics, kinetics and regeneration studies

Biosorption of lac dye by the red marine alga Gracilaria tenuistipitata: biosorption kinetics, isotherms, and thermodynamic parameters

Biosorption characteristics of Aspergillus fumigatus for the decolorization of triphenylmethane dye acid violet 49

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