Adsorption of methyl violet onto granular activated carbon: Equilibrium, kinetics and modeling

Azizian, Saeid; Haerifar, Monireh; Bashiri, Hadis

doi:10.1016/j.cej.2008.05.024

Cited by 164 publications

(92 citation statements)

References 26 publications

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“…The confidence limits at 95% of probability of the estimated parameters are reported in brackets. Furthermore, for the adsorption of CB it can be noted that the kinetic constant decreases by increasing the initial concentration [37], and that the adsorption onto Y zeolites is characterized by a lower kinetic constant than that found for ZSM-5. These findings allow us to generalize the difference observed in the adsorption kinetics of these two zeolites.…”

Section: Adsorption Isotherms From Aqueous Solutionsmentioning

confidence: 99%

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

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Abstract:In this work, the capability of two commercial high silica zeolites (HSZs), namely ZSM-5 and Y, for the removal of chlorobenzene (CB) from water was investigated by combining chromatographic and diffractometric techniques. The adsorption isotherms and kinetics of CB on ZSM-5 and Y zeolites were determined from batch tests. The adsorption kinetics were very fast; the time to reach equilibrium was less than 10 min. The equilibrium data of CB on the two HSZs showed dissimilarities that are particularly evident in the adsorption data concerning the low concentration range, where Y zeolite is characterized by low adsorption. On the contrary, at higher solution concentrations the adsorption capacity of Y is higher than that of ZSM-5. The crystalline structures of Y and ZSM-5 saturated with CB were investigated by X-ray diffraction (XRD) techniques. Rietveld refinement analyses of XRD data allowed for quantitative probing of the structural modifications of both zeolites after CB adsorption and provided insight into the preferred zeolite adsorption sites in both microporous materials. The refined framework-extraframework bond distances confirm that interactions between the selected organic contaminant and hydrophobic zeolites are mediated via co-adsorbed H 2 O. The occurrence of H 2 O-CB-framework oxygen oligomers explains variations in both the unit cell parameters and the shape of the channels, clearly confirming that water plays a very relevant role in controlling the diffusion and adsorption processes in hydrophobic zeolites.

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Section: Adsorption Isotherms From Aqueous Solutionsmentioning

confidence: 99%

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

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“…In particular, activated carbon, which is a micro-porous adsorbent, is very useful for the removal of various pollutants from water [13][14][15]. Activated carbon possesses a large surface area with a number of micro-pores that are ideal for use as an absorbent.…”

Section: Introductionmentioning

confidence: 99%

Application of fullerenes-extracted soot modified with ethylenediamine as a novel adsorbent of hexavalent chromium in water

Nakagawa

Kokubo

Moriwaki

2014

Journal of Environmental Chemical Engineering

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“…It is a complex task that requires substantial labour input and generates high costs while the results obtained describe only one particular adsorbent -adsorbate system. However, both the literature on the subject [1][2][3][4][5][6][7][8][9][10][11][12] and technological practice provide databases of sorption results for activated carbon-adsorbate systems that have already been investigated. Therefore, it seems reasonable to make use of those data to predict sorption in the systems that show comparable properties.…”

Section: Introductionmentioning

confidence: 99%

“…They include biodegradation, coagulation, sorption, oxidation and filtration [1][2][3]. Literature data [3][4][5][6] indicate that sorption on activated carbons is one of the most effective means of the removal of organic compounds. That is due to carbons extended porous structure and specific chemical properties of their surface.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the possibility of using data mining methods to predict sorption isotherms of selected organic compounds on activated carbon

2017

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Abstract. The paper analyses the use of four data mining methods (Support Vector Machines, Cascade Neural Networks, Random Forests and Boosted Trees) to predict sorption on activated carbons. The input data for statistical models included the activated carbon parameters, organic substances and equilibrium concentrations in the solution. The assessment of the predictive abilities of the developed models was made with the use of mean absolute error (MAE), mean absolute percentage error (MAPE), and root mean squared error (RMSE). The computations proved that methods of data mining considered in the study can be applied to predict sorption of selected organic compounds on activated carbon. The lowest values of sorption prediction errors were obtained with the Cascade Neural Networks method (MAE = 1.23 g/g; MAPE = 7.90% and RMSE = 1.81 g/g), while the highest error values were produced by the Boosted Trees method (MAE=14.31 g/g; MAPE = 39.43% and RMSE = 27.76 g/g).

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Adsorption of methyl violet onto granular activated carbon: Equilibrium, kinetics and modeling

Cited by 164 publications

References 26 publications

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Application of fullerenes-extracted soot modified with ethylenediamine as a novel adsorbent of hexavalent chromium in water

Assessment of the possibility of using data mining methods to predict sorption isotherms of selected organic compounds on activated carbon

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