Kinetic Models of Batch Sorption in a Limited Volume

Хамизов, Р. Х.; Sveshnikova, D. A.; Kucherova, A. E.; Sinyaeva, L. A.

doi:10.1134/s0036024418090121

Cited by 19 publications

(9 citation statements)

References 22 publications

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“…Physisorption depends on temperature and pressure, whereas a chemisorption process depends on interacting chemical bonds between the adsorbent and adsorbate. More is the surface are, more will be the possibility of active sites or bond formation, leading to an increase in the chemisorption process [25,[43][44][45][46].…”

Section: Adsorption Kinetic Studymentioning

confidence: 99%

Mechanistic Study of Phosphorus Adsorption onto Iron Z-A: Spectroscopic and Experimental Approach

et al. 2019

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Iron was incorporated into an LTA type zeolite using the sol-gel hydrothermal method to form Iron-zeolite-A (Iron-Z-A), and its phosphate adsorption-desorption efficiency were analyzed. Samples were characterized by EDS, SEM, XRD, EPR, FT-IR XPS, and Raman to ensure the apt synthesis of Iron-Z-A and to interpret the mechanism of adsorption-desorption of PO43− in an aqueous solution. EPR and XPS analysis confirmed that the iron was doped as Fe3+ in the LTA structure. The XPS peak shift (Fe-2p), FT-IR band shift, and intensity change (–OH) confirmed the existence of the ligand exchange mechanism. In the adsorption phase at pH 5, the derivative of phosphate (H2PO4−) acts as a ligand and interacts with OH of Fe on the zeolite surface to form “Iron-zeolite (oxy) hydroxide bound phosphate”. In the desorption phase at pH 10, phosphate ligand is detached and get mixed in the aqueous phase as HPO42−. The EDS data, Si–O–Al band shift and intensity change in FT-IR and XPS peak intensity change proved the contribution of Al in the process of adsorption. The data of adsorption fitted well with the Langmuir’s isotherm and pseudo-second-order kinetic model. The amount of PO43− adsorbed was a function of adsorbent’s surface area regardless of concentration. The amount of PO43− being adsorbed by the metal ions was found to be 382.296 mg PO43−/g Fe and 56.296 mg PO43−/g Al.

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Section: Adsorption Kinetic Studymentioning

confidence: 99%

Mechanistic Study of Phosphorus Adsorption onto Iron Z-A: Spectroscopic and Experimental Approach

et al. 2019

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“…The pseudo-second order equation was used since previous work on MgO has shown that the data with a higher quality of fit compared to the pseudo-first order, and since the pseudo-first order equation is more applicable to systems where the bulk adsorbate concentration does not vary significantly. 10,18,62 The phosphate concentrations during the first 30 minutes of reaction were fitted to the pseudo-second order equation to calculate the rate constant and phosphate adsorbed at equilibrium. Since phosphate adsorption on mesoporous MgO rapidly approaches equilibrium, with the majority of the phosphate adsorbed within the first 10 minutes, fitting to the first 30 minutes becomes sufficient.…”

Section: Effects Of Ecs On Struvite Production During Direct Nutrient...mentioning

confidence: 99%

Treatment of emerging contaminants in simulated wastewater via tandem photo-Fenton-like reaction and nutrient recovery

Silva

Eisa

Ragauskaitė

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…The modeling procedure does not take into account the concentration gradient in the adsorbent phase. In this case, the driving force of the mass transfer process is the difference between the boundary value of the concentration and its average current value in the sorbent [25]. However, as shown in [25][26][27], the most adequate application of the Lagergren model takes place only for a linear adsorption isotherm.…”

Section: Camentioning

confidence: 99%

“…So, the authors of works [12][13][14][15][16][17][18][19][20] pointed out that adsorption of molecules depends on the nature of interactions in the sorption system. Sorption kinetics is often described in terms of adsorption [21][22][23][24][25][26][27][28] and diffusion [29][30][31][32][33][34][35][36][37][38][39][40][41] models. All mentioned works demonstrate a variety of factors influencing mass transfer and the mechanism of sorption.…”

Section: Introductionmentioning

confidence: 99%

Studies on sorption properties of ordered mesoporous silica MCM- 41 and SBA-15 toward non-polar α-tocopherol. Part 1. Kinetics of sorption

Карпов

Inshakova

Khludneva

et al. 2022

Preprint

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The sorption kinetics of α-tocopherol (TP) was studied on nanostructured silica materials such as MCM-41 and SBA-15. A significant influence of the pore size on the type of kinetics was noted. In case of MCM-41 (pore size 2.7-3.0 nm), the pseudo-second-order model has the best correlation with the kinetic data. The kinetic coefficients are 1-1.5 orders of magnitude higher than those for SBA-15 (pore size 6.0-6.5 nm). Consequently, the sorption equilibrium is established much faster. For the description of the adsorption behavior of TP on SBA-15 intraparticle diffusion models were applied. In comparison with the Boyd and Weber-Morrison model, the Vermeulen approach describes the best fit with the experimental data. The filling of the large mesopores of SBA-15 results in a higher adsorption capacity of TP compared with MCM-41. It is noted, that increase of temperature in the range 273-318 K leads to decrease of the sorption capacity for both silicas. Raise of the temperature during sorption on MCM-41 results in the increase of the contribution of diffusion inside mesopores in comparison with surface diffusion.

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Kinetic Models of Batch Sorption in a Limited Volume

Cited by 19 publications

References 22 publications

Mechanistic Study of Phosphorus Adsorption onto Iron Z-A: Spectroscopic and Experimental Approach

Mechanistic Study of Phosphorus Adsorption onto Iron Z-A: Spectroscopic and Experimental Approach

Treatment of emerging contaminants in simulated wastewater via tandem photo-Fenton-like reaction and nutrient recovery

Studies on sorption properties of ordered mesoporous silica MCM- 41 and SBA-15 toward non-polar α-tocopherol. Part 1. Kinetics of sorption

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