Adsorption of methylene blue and eosin yellow using porous carbon prepared from tea waste: Adsorption equilibrium, kinetics and thermodynamics study

Borah, Lukumoni; Goswami, Mridusmita; Phukan, Prodeep

doi:10.1016/j.jece.2015.02.013

Cited by 134 publications

(54 citation statements)

References 54 publications

(68 reference statements)

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“…It was observed from Table 4, the adsorption capacity increases with the increase in initial dye concentration, solution pH and temperature but decreases with the increase of amount of adsorbent. Similar types of adsorption kinetic parameters were reported for the removal of MB dye by different [3,14]:…”

Section: Pseudo-first-order and Pseudo-second-order Kinetic Modelssupporting

confidence: 73%

“…Also, the constant value R L (low separation factor) in Langmuir isotherm and Freundlich constant, n, were both presented in Table 5 and indicate a favourable and physical adsorption process. The Langmuir adsorption isotherm model provides the best fit for the system of EB bio-char adsorption on MB dye and similar adsorption isotherm trends were reported by various [3,4,14]. The adsorption capacity of EB bio-char into MB dye has been compared with other agriculture solid waste biochar, biomass activated carbon and CAC under similar experimental conditions as presented in Table 6.…”

Section: Adsorption Equilibrium Isothermsupporting

confidence: 62%

“…Generally, agriculture solid waste materials have little or no economic value and often present a disposal problem [9]. There are many reported agriculture solid waste-based bio-char and activated carbon used in the removal of various dyes such as Methylene Blue and Acid orange by bamboo bio-char [10], Reactive Violet by Cocoa shell activated carbon [11], Congo Red by pine cone-based activated carbon [12], Methylene Blue and Methylene Orange by Macore fruit activated carbon [13] and Acid Blue by waste tea activated carbon [14,15]. Readers are encouraged to go through these review articles.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption removal of Methylene Blue (MB) dye from aqueous solution by bio-char prepared from Eucalyptus sheathiana bark: kinetic, equilibrium, mechanism, thermodynamic and process design

Dawood

Sen

Phan

2016

Desalination and Water Treatment

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A B S T R A C TEucalyptus bark (EB) materials-based bio-char adsorbent was synthesised and characterised using SEM-EDS, BET and CHN analyser. The adsorbent surface functional groups were determined by FT-IR analyser. Various textural characteristics such as BET surface area, pore size, bulk density, point of zero charge were also determined. The adsorption potential of these bio-char for the removal of cationic dye Methylene Blue (MB) from aqueous solution was studied. The effects of various temperature profiles on the production of EB biochar were studied and the most efficient temperature profile was identified at 500˚C. Batch adsorption kinetic study showed that the amount of dye adsorbed q t (mg/g) depends on various physicochemical process parameters such as initial solution pH, dye concentration, temperature, adsorbent dose, salt concentration and presence of SDS surfactant. It was found that the extent of MB dye adsorption by EB bio-char increased with the increase of initial dye concentration, contact time, temperature, SDS surfactant concentration and solution pH, but decreased with the increase of adsorbent dose and salt concentration. The optimum adsorption conditions were found at the initial dye concentration of 100 mg/L, initial solution pH of 11.3, adsorbent dose of 10 mg and solution temperature of 55˚C. Furthermore, pseudo-first-order, pseudo-second-order and intra-particle diffusion models were fitted to examine the adsorption kinetics and mechanism of adsorption. Equilibrium data were best represented by Langmuir isotherm model and gives a monolayer effective adsorption capacity of bio-char which is comparative to other adsorbents including commercial activated carbon. Thermodynamic parameters suggested that the adsorption was an endothermic, spontaneous and physical in nature. Furthermore, a single-stage batch adsorber design for the MB dye onto EB bio-char particles were presented based on the Langmuir isotherm model equation. These results indicated EB biomass as good and cheap precursor for the production of an effective and environmental friendly bio-char adsorbent.

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Section: Pseudo-first-order and Pseudo-second-order Kinetic Modelssupporting

confidence: 73%

Section: Adsorption Equilibrium Isothermsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption removal of Methylene Blue (MB) dye from aqueous solution by bio-char prepared from Eucalyptus sheathiana bark: kinetic, equilibrium, mechanism, thermodynamic and process design

Dawood

Sen

Phan

2016

Desalination and Water Treatment

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show abstract

“…have used a jute fiber carbon as an adsorbent to remove EY from aqueous solution and the adsorption capacity was ca 31.49 mg g ‐1 . Likewise, the porous carbon (PSC) derived from tea waste as an adsorbent and the result of adsorption capacity 400 mg g ‐1 was calculated . Moreover, biosynthesized nickel nanoparticles (NiGs) were also used as adsorbent for the removal of EY dye from aqueous solution and the maximum adsorption capacity was calculated to be 0.615 mg⋅g −1 at pH 3 .…”

Section: Resultsmentioning

confidence: 99%

Graphene Oxide Nanosheets as An Efficient and Reusable Sorbents for Eosin Yellow Dye Removal from Aqueous Solutions

et al. 2017

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In this study, 2D graphene oxide nanosheets (GONS) were synthesized and characterized by XRD, Raman, SEM, FE‐SEM, TEM, XPS, TGA, UV‐vis and FTIR spectral techniques. The efficiency of eosin yellow (EY) dye adsorption on the GONS under various experimental parameters such as contact time, pH and temperature was investigated. Adsorption kinetic data were characterized appropriately using pseudo second‐order‐kinetics and intraparticle diffusion methods. Free energy of adsorption (ΔG0), enthalpy (ΔH0), entropy (ΔS0) changes, activation energy and Arrhenius factors were also calculated. The endothermic and spontaneous nature of the adsorption process was confirmed by the positive value of the enthalpy change (ΔH0) and the negative value of free energy change (ΔG0). The adsorption mechanism was investigated by FTIR spectra of GONS before and after adsorption of EY dye molecules. The remarkable adsorption capacity of EY onto the GONS can be attributed to the various adsorption interaction mechanisms such as hydrogen bonding, π‐π electron, and electrostatic interactions. The maximum adsorption capacity for EY was calculated to be 217.33 mg g‐1.

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“…The adsorption efficiency of CR dye is not significantly affected by further increase in adsorbent dose over 0.5 g/L. This indicates that a part of PANi/Bi2WO6 surface remains uncovered, because of the aggregation of the adsorbent particles at higher adsorbent dose[44,45].…”

mentioning

confidence: 99%

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

Laabd

Ahsaine

Jaouhari

et al. 2016

Journal of Environmental Chemical Engineering

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Adsorption of methylene blue and eosin yellow using porous carbon prepared from tea waste: Adsorption equilibrium, kinetics and thermodynamics study

Cited by 134 publications

References 54 publications

Adsorption removal of Methylene Blue (MB) dye from aqueous solution by bio-char prepared from Eucalyptus sheathiana bark: kinetic, equilibrium, mechanism, thermodynamic and process design

Adsorption removal of Methylene Blue (MB) dye from aqueous solution by bio-char prepared from Eucalyptus sheathiana bark: kinetic, equilibrium, mechanism, thermodynamic and process design

Graphene Oxide Nanosheets as An Efficient and Reusable Sorbents for Eosin Yellow Dye Removal from Aqueous Solutions

Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

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