A dynamic intraparticle model for fluid–solid adsorption kinetics

Russo, Vincenzo; Tesser, Riccardo; Trifuoggi, Marco; Giugni, Maurizio; Serio, Martino Di

doi:10.1016/j.compchemeng.2015.01.001

Cited by 39 publications

(49 citation statements)

References 12 publications

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“…Many mathematical models have been developed for intraparticle diffusion of liquid adsorption on porous materials, attempting to understand adsorption kinetics in relation to the adsorbent pore structures and surface properties in terms of a constant diffusion coefficient assuming homogeneous pore property of the adsorbent [30][31][32][33][34][35][36][37][38]. Study of pore size heterogeneity revealed the variation of adsorbate diffusivity within the porous adsorbent [23,39,40].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of pyridine from aqueous solutions by polymeric adsorbents MN 200 and MN 500. Part 2: Kinetics and diffusion analysis

Zhu

Moggridge

D’Agostino

2016

Chemical Engineering Journal

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Telephone: +44 (0)1223 334763Fax: +44 (0)1223 334796 2 AbstractThe adsorption kinetics of pyridine adsorption on Macronet adsorbents MN 200 and MN 500 from aqueous solution was investigated at various initial pyridine concentrations and temperatures. The Weber-Morris plots revealed the influence of both external film diffusion and intraparticle diffusion resistances. The two linear regions in Weber-Morris plots were attributed to macropore and micropore diffusion, which was associated to the bimodal pore size distribution of the adsorbents. New insights into the diffusion mechanisms were highlighted, with the proposed internal film diffusion resistance dominating into the macropore region, whereas homogeneous particle diffusion resistance describes diffusion in the micropore region. The importance of pore and surface diffusion in the micropores was noted in contributing to the observed diffusion kinetics. The pore diffusion coefficient was estimated from PFG (pulsedfield gradient) parameter and molecular diffusion coefficient of pyridine in bulk liquid. A greater contribution of the surface to the overall diffusion kinetics was found for MN 500 as inferred from a proposed calculation method, which agrees with its better adsorption performance. The overall findings highlight the effect of pore structure onto the diffusion mechanisms inside the pores and help to gain a better understanding into the adsorption kinetics of these Macronet adsorbents, which are promising materials for the removal of Nheterocyclic compounds from waste water.

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Section: Introductionmentioning

confidence: 99%

Adsorption of pyridine from aqueous solutions by polymeric adsorbents MN 200 and MN 500. Part 2: Kinetics and diffusion analysis

Zhu

Moggridge

D’Agostino

2016

Chemical Engineering Journal

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“…The nucleation and growth of stone-forming minerals is related to the interfacial energy between the liquid (urine) and the solid (the growing stone) (Wu et al, 1999;Russo et al, 2015). On turn, the interfacial energy is determined by the surface tension of the two phases put in contact (Marmur & Valal, 2010;Muñoz-García et al, 2015).…”

Section: Ion Specificity In Determining Physico-chemical Properties Omentioning

confidence: 99%

Ion specificity in determining physico-chemical properties of drinking water

et al. 2019

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Drinking water plays a key role in regulating the daily salt intake, thus potentially affecting (either in positive or in negative direction) the incidence of diet-related pathologies, including nephrolithiasis. Being regarded as wholesome, bottled water is increasingly preferred to tap water. However, its physico-chemical characterization, as reported on the label, is usually limited to pH and conductivity measurements, along with ion content. Dther parameters, which also are likely to influence the processes in which water is involved in the body, are usually neglected. On this work, the surface tension and density of tap water and two bottled mineral waters produced in Otaly are investigated. These parameters are critically determined by the ion content. Density is connected to the total ion amount, while surface tension is differentially affected by the presence of specific ionsI: sulfate increases its value, while bicarbonate keeps it almost constant. These results furnish a reliable scientific basis for future investigation on the connection between the physico-chemical properties of drinking water and its effect on health. Particularly, since interfacial phenomena play a key role in kidney stone formation, our results suggest that dietary enrichment of selected ions due to water intake could affect nephrolithiasis.

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“…The kinetic data interpretation reported in this manuscript have been performed with the dynamic model recently published by Russo et al [17]. The main points are here summarized to make the reader friendly with the topic.…”

Section: Theorymentioning

confidence: 99%

“…Recently, Russo et al [17] tested a diffusive model proposed by Do [5], applied for gas-solid systems, for liquid-solid adsorption kinetics based on both film and intraparticle mass transfer. Cu(II) and Pb(II), adsorption batch experiments onto various kind of silica were interpreted obtaining good results in terms of data fitting [17].…”

Section: Introductionmentioning

confidence: 99%

“…Cu(II) and Pb(II), adsorption batch experiments onto various kind of silica were interpreted obtaining good results in terms of data fitting [17]. However, in order to demonstrate that the model can be considered general, so independent on the adsorbate/absorbent couple, it is necessary to test it on a wider number of cases, including adsorbents and pollutants/products/by-products of different chemical nature.…”

Section: Introductionmentioning

confidence: 99%

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