Batch Equilibrium and Effects of Ionic Strength on Kinetic Study of Adsorption of Phenacetin from Aqueous Solution Using Activated Carbon Derived from a Mixture of Ayous Sawdust and Cucurbitaceae Peelings

Ngakou, Christian Sadeu; Ngomo, Horace Manga; Anagho, Solomon Gabche

doi:10.9734/cjast/2018/37300

Cited by 12 publications

(10 citation statements)

References 14 publications

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“…The residual plot and the different errors in the case of pseudo-first order show that this model does not adequately describe the phenacetin adsorption process but the proximity between the experimental adsorbed quantity and the predicted one allow us to say that adsorption of phenacetin do not follow ideal multi-layer adsorption. This conclusion is same as the one obtained in linear plot [32]. The pseudo-second order is based on π-π interaction between [19].…”

Section: Kinetic Studiessupporting

confidence: 87%

Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

Ngakou

Anagho

Ngomo

2019

CJAST

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Activated carbon obtained from ayous sawdust, Cucurbitaceae (egussi) peelings and the mixture of the two were studied for the adsorption of phenacetin. Characterisation of activated carbon by SEM and XRD analysis shows that the mixture of precursors combine the properties of activated carbon obtained separately. The well-knownbatch sorption models– Langmuir (one and two sites), Freudlich, Tempkin, Elovich, Langmuir-Freudlich, Redlich Peterson, Radke-Prausnitz, Fritz Shlunder)—were tested with experimental data for the adsorption of phenacetin to estimate adsorption equilibrium parameters—rate constantsand adsorption capacities. The model with the best fit was identified from extensive statistical analysis of the results of nonlinear regression of the experimental data. Comparison of the statistical errors in parameter estimation between linear and non-linear isotherm models shows that transformation of non-linear isotherm equations to linear forms implicitly alter their error structure. The much smaller size of the various error indicators —Determination Coefficient, R2; Sum of Square Errors, SSE; Chi Test, χ2; Average Relative Errors, ARE—, calculated for the case of non linearization when compared to linearization, indicate the greater accuracy in the application of non linearization. The Langmuir model (one site) gave the best fit and thus the values of adsorption capacity for each activated carbon were calculated from it. Kinetic models show that weak and strong interactions are involved in the adsorption process and that the controlling mechanism may not be limited to intra particle diffusion. The lower value of the boundary layer thickness in the case of activated carbon obtained from the mixture, justified the higher adsorbed quantity of this activated carbon compared to those of activated carbon from each precursor.

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Section: Kinetic Studiessupporting

confidence: 87%

Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

Ngakou

Anagho

Ngomo

2019

CJAST

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“…have been used for the adsorption of dyes, various organic compounds and antipyretic/analgesic drugs [13] [14] [15]. The advantage of chemical activation is that the pyrolysis stage of the synthesis is achieved at low temperature, thereby greatly reducing the cost of fabrication.…”

Section: Activated Carbons Prepared By Chemical Activation Of Lignocementioning

confidence: 99%

“…The costs of activated carbons prepared from lignocellulosic materials are very low compared to the cost of commercial activated carbons [9]. Many activated carbons have been produced from various carbonaceous materials resulting from agricultural wastes such as coconut shells [9], cola nut shells [13], rice and coffee husks [14], Ayous sawdust and Cucurbitaceous peelings [15], hibiscus sabdariffa and stalk biomass [16]. In this work, we will prepare ACs using shells of Garcinia cola (bitter cola) nuts [17], due to the availability and cost free of the material as well as its high carbon content.…”

Section: Activated Carbons Prepared By Chemical Activation Of Lignocementioning

confidence: 99%

Kinetic, Isotherm and Thermodynamic Studies of the Adsorption of Thymol Blue onto Powdered Activated Carbons from Garcinia cola Nut Shells Impregnated with H3PO4 and KOH: Non-Linear Regression Analysis

Kuete¹,

Tchuifon²,

Ndifor-Angwafor³

et al. 2020

JEAS

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In this work, activated carbons (ACs) prepared by chemical activation of garcinia cola nut shell impregnated with H 3 PO 4 (CBH 2/1) and KOH (CBK 1/1) were used to study the kinetics, equilibrium and thermodynamics of the adsorption of thymol blue from aqueous solution. The characterization of ACs showed the BET measurements gave surface area and total pore volume respectively of 328.407 m 2 •g −1 and 0.1032 cm 3 •g −1 for CBH 2/1 and 25.962 m 2 •g −1 and 0.03 cm 3 •g −1 for CBK 1/1 ; elemental analysis showed a high percentage of carbon in both ACs. Influence of parameters such as initial pH, contact time, adsorbent mass, initial concentration, ionic strength and the effect of temperature on the removal of thymol blue from aqueous solution were studied in batch mode. The studies showed that equilibrium adsorption was attained after 60 minutes for the two ACs, adsorption capacity increased with increasing concentration of thymol blue, and maximum adsorption capacity was obtained at an acidic environment with pH 2. Avrami's non-linear kinetic expression was the best suited for describing the adsorption kinetics of thymol blue onto ACs, while equilibrium data showed that the three-parameter isotherms better described the adsorption process since R 2 > 0.96, and the error functions were lowest for all of them.

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“…Previously, research working on various precursors for activated carbon has studied the possibility and efficiency of utilization of agricultural fibres as an adsorbent for Phenolic compounds removal in polluted water. Some of the low cost agricultural wastes that have been studied include: rice husk (Tchuifon et al, 2014;Okieimen et al, 2007;Ndifor-Angwafor et al, 2017), palm kernel shell (Abechi et al, 2013), lapsi (Choerospondias axillaris) seed stone (Sahira and Bhadra, 2013), cola nut (cola acuminata) shells (Ndi et al, 2014), bitter kola (Garcinia kola) nut shells (Kuete et al, 2018) and mixture of Ayous sawdust and Cucurbitaceae peelings (Ngakou et al, 2018). These agricultural wastes which are used to produce the activated carbons are generated in large quantities and in some cases might become difficult to dispose and have proven very effective in the adsorption of phenolic compounds removal in water.…”

Section: Introductionmentioning

confidence: 99%

Non-linear equilibrium and kinetic study of the adsorption of 2,4-dinitrophenol from aqueous solution using activated carbon derived from a olives stones and cotton cake

Bopda¹,

Tchuifon²,

Ndifor-Angwafor³

et al. 2019

Afr. J. Environ. Sci. Technol.

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Olives stones and cotton cakes have been investigated as a cheap and available precursor used for the production of novel carbon using potassium hydroxide as chemical activating agent with 2:1 impregnation ratio at 1.5 M KOH. Carbonization was performed at 450°C for one hour. The activated carbons NOK and MK3 were characterized by Iodine Number, Fourier Transform Infrared (FTIR) spectroscopy, EDX Analysis, Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) Analysis and Proximate Analysis (pH ZCN , pH, volatile matter, fixed carbon). The effects of initial sorbate concentration and contact time on adsorption were evaluated. Errors analysis methods were used to evaluate the experimental data: Correlation coefficient (R 2), chi-square (χ 2), average relative error (ARE), sum of absolute errors (EABS) and root mean square error (RMSE) values were tested to find the best fitting isotherm. Elovich models provide the best fit in the uptake of 2,4-dinitrophenol by activated carbons NOK and MK3. Thus, among the isotherm models studied, it appears that the Dubinin-Radushkevich and Temkin (two parameters), Sips (three parameters) and Baudu (four parameters) models describe better the adsorption data. Error analysis showed that the models with two parameters better described the adsorption of 2,4-diniphenol data compared with the three parameter and fourparameter models.

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Batch Equilibrium and Effects of Ionic Strength on Kinetic Study of Adsorption of Phenacetin from Aqueous Solution Using Activated Carbon Derived from a Mixture of Ayous Sawdust and Cucurbitaceae Peelings

Cited by 12 publications

References 14 publications

Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

Kinetic, Isotherm and Thermodynamic Studies of the Adsorption of Thymol Blue onto Powdered Activated Carbons from <i>Garcinia cola Nut</i> Shells Impregnated with H<sub>3</sub>PO<sub>4</sub> and KOH: Non-Linear Regression Analysis

Non-linear equilibrium and kinetic study of the adsorption of 2,4-dinitrophenol from aqueous solution using activated carbon derived from a olives stones and cotton cake

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Batch Equilibrium and Effects of Ionic Strength on Kinetic Study of Adsorption of Phenacetin from Aqueous Solution Using Activated Carbon Derived from a Mixture of Ayous Sawdust and Cucurbitaceae Peelings

Cited by 12 publications

References 14 publications

Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

Kinetic, Isotherm and Thermodynamic Studies of the Adsorption of Thymol Blue onto Powdered Activated Carbons from &lt;i&gt;Garcinia cola Nut&lt;/i&gt; Shells Impregnated with H&lt;sub&gt;3&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt; and KOH: Non-Linear Regression Analysis

Non-linear equilibrium and kinetic study of the adsorption of 2,4-dinitrophenol from aqueous solution using activated carbon derived from a olives stones and cotton cake

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Kinetic, Isotherm and Thermodynamic Studies of the Adsorption of Thymol Blue onto Powdered Activated Carbons from <i>Garcinia cola Nut</i> Shells Impregnated with H<sub>3</sub>PO<sub>4</sub> and KOH: Non-Linear Regression Analysis