Kinetic Studies of Methylene Blue Adsorption on to Activated Carbon Prepared from Plantain Pod (Musa paradisiac)

Gumus, Rhoda H.

doi:10.9734/bjast/2016/24079

Cited by 5 publications

(4 citation statements)

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“…The Freundlich adsorption isotherm is originally an empirical model but was later interpreted as biosorption onto heterogeneous surfaces (that is, surfaces supporting sites of varied affinities). And it is now widely used for data obtained from experiments [17]. The Freundlich isotherm is applied to estimate the adsorption intensity of the adsorbent towards the adsorbate [18].…”

Section: Freundlich Adsorption Isothermmentioning

confidence: 99%

Methylene Blue and Iron (II) Adsorption onto Raphia Hookeri Seed: A Comparative Equilibrium Isotherm Study

Tarbuka

Gumus

2021

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In this study, activated carbon prepared from Raphia hookeri seed was employed as an adsorbent to take up methylene blue (an organic ion-in-solution) and iron (II), a metal ion-in-solution. The biosorbent was prepared using chemical activation using sodium hydroxide (NaOH) as an impregnating agent. Calibration was performed with a focus on the change in the adsorbate concentration. The equilibrium isotherms study was conducted by considering a range of sorbate concentrations, to determine the optimal conditions for the adsorption systems. The same sorbate volume (10 ml), and the same dosage (0.3g) of biosorbent were used for both adsorption processes. Linear analysis was used to compare the best-fitting isotherms. Langmuir, Freundlich, and Dubinin-Radushkevich models were tested. The highest coefficient of determination values (R2) for both iron (II) and Methylene blue was obtained from the Langmuir isotherm as 0.9266 and 0.9572, respectively, compared to values from the other isotherms tested – indicative of Langmuir isotherm’s superior fit. Estimated values of ‘separation factor’, KR, for Methylene blue (0.29457), however, was lower than that of iron (II) (0.42141) - an indication that the sorbent treats methylene blue better than iron (II), though both processes are feasible.

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Section: Freundlich Adsorption Isothermmentioning

confidence: 99%

Methylene Blue and Iron (II) Adsorption onto Raphia Hookeri Seed: A Comparative Equilibrium Isotherm Study

Tarbuka

Gumus

2021

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“…A modified static batch adsorption procedure based on Gumus (2016) and Ciobanu et al (2016) was employed to study dye adsorption onto the powdered adsorbents (WSA and NLA) by transferring 50 mL aliquots of 300 mg/L concentration of freshly prepared methyl orange at a fixed pH into a 250-mL conical flask containing 500 mg dosage of the adsorbent of ≤75 µm mesh particle sizes. The mixture was then placed into a thermostatic shaker set at room temperature (298.15 K), constant agitation speed of 150 rpm and for a predetermined contact time.…”

Section: B Batch Adsorption Studiesmentioning

confidence: 99%

“…Sum of the absolute errors (SAE) is given by Equation (12). The kinetic parameters determined by this method provide a better fit as the magnitude of the errors increase, biasing the fit towards the data with high concentration [1].…”

Section: F Error Analysis Of Kinetics Datamentioning

confidence: 99%

“…A large number of these techniques were proved ineffective due to production of large amounts of secondary pollutant sludge, needed highly trained personnel and have high cost of maintenance. One effective and attractive method in the treatment of such effluents is the adsorption process using natural and synthetic low cost adsorbents such as fly ashes and zeolites [9], Kaolin [10], kola nut shell activated carbons [11], chitosan beads [12], rice husk and egussi peelings [13], neem and mango barks [14] natural and modified orange peel [15] and neem leaf [16]. The present study is aimed at conducting laboratory scale batch adsorption experiments to evaluate select kinetics models and thermodynamics parameters of methyl orange dye removal from synthetic aqueous dyeing effluent onto watermelon shell (WSA) and neem leaves (NLA) as locally available low-cost adsorbents from Katsina, Nigeria.…”

Section: Introductionmentioning

confidence: 99%

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Kinetics and Thermodynamics of Methyl Orange Uptake from Model Effluent by Watermelon Shells and Neem Leaves

2017

IJACEBS

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Abstract-The adsorption kinetics and thermodynamics of methyl orange dye removal from model dyeing effluent by cheap watermelon (Citrullus lanatus) shells (WSA) and neem (Azadirachta indica) leaves (NLA) adsorbents were investigated. Kinetic parameters of pseudo-first order (PS-1), pseudo-second order (PS-2), intraparticle diffusion (IP-D) and Elovich's (EL-V) models for the dye adsorption onto the adsorbents were determined. Linear coefficients of determination (R 2 ) for all the models were in the range 0.0411-0.9224 for WSA and 0.4241-0.9979 for NLA. The goodnessof-fit of the models for the dye uptake onto both adsorbents was in the order PS-2 > PS-1 > IP-D > EL-V with the PS-2 model having the best and EL-V model having the least fitting of the experimental data in each case. Adsorption rate constants for the models also followed similar pattern with the best rate in PS-2 model (k 2 for WSA: 17.2726 g. and α for NLA: 2.87×10 -11 g.mg -1 .min -1 ). Error analyses and χ 2 -test of the data confirmed NLA to be a better adsorbent than WSA but both adsorbents are potentially effective for the dye removal from the effluent.

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Production and characterisation of adsorbents synthesised by hydrothermal carbonisation of biomass wastes

et al. 2021

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Surface structure and chemical properties of adsorbents are important factors required to understand the mechanism of adsorption. The purpose of this study was to produce hydrochars from biomass using hydrothermal carbonisation (HTC) and to analyse their sorption capacities. The biomass used in this study were coco-peat (CP), coconut shell (CS), eggshell (ES), rice husk (RH) and lemon peel (LP). The operating conditions for HTC were 200 °C and 20 h residence time. The characterisation methods consisted of Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS), Fourier Transform Infrared Ray (FTIR) Spectroscopy, and Brunauer, Emmett and Teller (BET). The results showed that HTC improved the sorption capacities of the biomass wastes. It was found that hydrochars were crispy and flaky with more micro- and meso-porous structures, indicating that lignin and other components were denatured due to carbonisation. This led to the creation of more active sites for sorption and pollutant binding. The hydrochars showed a percentage increase in carbon content and a decrease in oxygen content with traces of other elements, compared to their corresponding raw biomass. The major functional groups identified were –OH and –COOH. The surface area of the hydrochars which include CP (2.14 m2/g), CS (14.04 m2/g), ES (0.50 m2/g), RH (15.74 m2/g), and LP (6.89 m2/g) were significantly improved compared with those of the raw biomass. The study showed that the hydrochars produced from the biomass wastes have the potential to be used as adsorbents.

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Kinetic Studies of Methylene Blue Adsorption on to Activated Carbon Prepared from Plantain Pod (Musa paradisiac)

Cited by 5 publications

References 0 publications

Methylene Blue and Iron (II) Adsorption onto Raphia Hookeri Seed: A Comparative Equilibrium Isotherm Study

Methylene Blue and Iron (II) Adsorption onto Raphia Hookeri Seed: A Comparative Equilibrium Isotherm Study

Kinetics and Thermodynamics of Methyl Orange Uptake from Model Effluent by Watermelon Shells and Neem Leaves

Production and characterisation of adsorbents synthesised by hydrothermal carbonisation of biomass wastes

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