Adsorption of resorcinol and catechol on granular activated carbon: Equilibrium and kinetics

Kumar, Arinjay; Kumar, Shashi; Kumar, Surendra

doi:10.1016/s0008-6223(03)00431-7

Cited by 170 publications

(84 citation statements)

References 19 publications

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“…At this stage, the repulsive forces between the adsorbed molecules and molecules in solution become important. This phenomenon has been described by many authors [22], [23]. …”

Section: 1 Effect Of Contact Timesupporting

confidence: 53%

Adsorptive removal of catechol and resorcinol by orange flavedo (citrus sinensis): mechanisms based on the flavedo com-ponents d-limonene, carotenoids, ascorbates, flavonoids and hydroxycinnamic acids

Kamgaing¹,

Doungmo²,

Julio³

et al. 2017

IJBAS

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Orange flavedo and its adsorption behavior towards catechol (Ctc) and resorcinol (Res) were studied. Adsorption experiments were conducted in batch mode at room temperature. X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Brunauer−Emmett−Teller (BET) and Fourier transform infrared (FTIR) data were used to characterize the biosorbent. The Effects of various parameters including equilibrium pH, sorbent dosage, initial adsorbate concentration and contact time were investigated. The optimum contact time and pH for the removal of Ctc and Res were 35 min and pH 2 respectively. The adsorption isotherms fitted well with Freundlich model, the adsorption of Ctc and Res being multilayer and the surface of orange flavedo heterogeneous; the pseudo-second order kinetic model better reflects the adsorption phenomena. An adsorption mechanism based on the molecules grafted to the surface of the orange flavedo is proposed in this study. 0.2 gram of the biosorbent was sufficient to completely eliminate 2.2 milligrams of resorcinol and catechol from solution. Therefore, non-modified orange flavedo is a promising candidate, as a lowcost biosorbent, for the removal of Ctc and Res from aqueous solution.

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“…At this stage, the repulsive forces between the adsorbed molecules and molecules in solution become important. This phenomenon has been described by many authors [22], [23]. …”

Section: 1 Effect Of Contact Timesupporting

confidence: 53%

Adsorptive removal of catechol and resorcinol by orange flavedo (citrus sinensis): mechanisms based on the flavedo com-ponents d-limonene, carotenoids, ascorbates, flavonoids and hydroxycinnamic acids

Kamgaing¹,

Doungmo²,

Julio³

et al. 2017

IJBAS

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“…For these reasons, several technologies have been investigated for the removal of catechol from wastewater and aqueous solutions, including biological methods [11,12], adsorption [13,14], ozonation process [15,16], advanced photo-oxidation process [17] and Fenton and photo-Fenton [9,18].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Electrochemical treatment of aqueous solutions of catechol by various electrochemical advanced oxidation processes: Effect of the process and of operating parameters

Ltaïef

D’Angelo

Ammar

et al. 2017

Journal of Electroanalytical Chemistry

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“…The evaluation of the adsorption kinetics was tested by subsequent models, which are pseudo-first order (Kumar et al 2003), pseudo-second order (Ho et al 2000) and Elovich (Chien and Clayton 1980).…”

Section: Models For Kinetic and Equilibrium Studiesmentioning

confidence: 99%

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

2017

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The present investigation emphasizes on the biosorptive removal of toxic pentavalent arsenic from water using steam activated carbon prepared from mung bean husk (SAC-MBH). Characterization of the synthesized sorbent was done using different instrumental techniques, i.e., SEM, BET and point of zero charge. Sorptive uptake of As(V) over steam activated MBH as a function of pH (3-9), agitation speed (40-200 rpm), dosage (50-1000 mg) and temperature (298-313 K) was studied by batch process at arsenic concentration of 2 mg L -1 . Lower pH increases the arsenic removal over the pH range of 3-9. Among three adsorption isotherm models examined, Langmuir model was observed to show superior results over Freundlich model. The mean sorption energy (E) estimated by Dubinin-Radushkevich model suggested that the process of adsorption was chemisorption. Thermodynamic parameters confer that the sorption process was spontaneous, exothermic and feasible in nature. The pseudo-second-order rate kinetics of arsenic gave better correlation coefficients as compared to pseudo-first-order kinetics equation. Three process parameters, viz. adsorbent dosage, agitation speed and pH were opted for optimizing As(V) elimination using central composite design matrix of response surface methodology (RSM). The identical design setup was used for artificial neural network (ANN) for comparing its prediction capability with RSM towards As(V) removal. Maximum arsenic removal was observed to be 98.75% at sorbent dosage 0.75 gm L -1 , pH 3.0, agitation speed 160 rpm and temperature 308 K. The study concluded that SAC-MBH could be a competent adsorbent for As(V) removal and ANN model was better in arsenic removal predictability results than RSM model.

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Adsorption of resorcinol and catechol on granular activated carbon: Equilibrium and kinetics

Cited by 170 publications

References 19 publications

Adsorptive removal of catechol and resorcinol by orange flavedo (citrus sinensis): mechanisms based on the flavedo com-ponents d-limonene, carotenoids, ascorbates, flavonoids and hydroxycinnamic acids

Adsorptive removal of catechol and resorcinol by orange flavedo (citrus sinensis): mechanisms based on the flavedo com-ponents d-limonene, carotenoids, ascorbates, flavonoids and hydroxycinnamic acids

Electrochemical treatment of aqueous solutions of catechol by various electrochemical advanced oxidation processes: Effect of the process and of operating parameters

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

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