Low-temperature plasma-modified zeolite (LTPMZ) vs. natural Bulgarian zeolite (NBZ) – Comparative physicochemical, UV/VIS and FTIR studies

Yaneva, Zvezdelina; Georgieva, N.; Pavlov, Angel

doi:10.20450/mjcce.2016.850

Cited by 4 publications

(5 citation statements)

References 11 publications

(15 reference statements)

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“…Pseudo‐second order kinetic model, usually applied for solid–liquid systems, is defined according with the following expression:

\frac{d q_{t}}{dt} = K_{2} {(q_{e} - q_{t})}^{2}

…”

Section: Sorption Kinetics Modelsmentioning

confidence: 99%

“…Elovich's equation, based on the sorption capacity, is typically expressed as:

\frac{{italicdq}_{t}}{dt} = α e^{- β q_{t}}

where q t (mg g −1 ) is the sorption capacity at time t . The coefficient α (mg g −1 s −1 ) can be considered the initial sorption rate considering that dq t /dt approaches α when q t → 0. β (g mg −1 ) is the absorption constant during any one experiment and it is related to the extent of surface coverage and the activation energy for chemisorption . Integrating considering that q t = q t at t = t and q t = 0 at t = 0 and assuming also that α, β, and t ≫1, eq.…”

Section: Sorption Kinetics Modelsmentioning

confidence: 99%

“…The Weber's intraparticle diffusion model is widely used to evaluate the main aspects of diffusion mechanisms. This model is defined according to the following equation:

q_{t} = K_{id} t^{1 / 2} + C

where k id , the intraparticle diffusion rate constant (mg g −1 s −1/2 ), is the slope of the linear plot of q t versus t 1/2 . C is the intercept and it is related to the thickness of the boundary layer.…”

Section: Sorption Kinetics Modelsmentioning

confidence: 99%

“…Chemisorption process results rate limiting in the sorption test. Later, they conducted the same kinetics study on nitrophenols/expanded perlite systems . Bastani et al .…”

Section: Introductionmentioning

confidence: 99%

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Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Piperopoulos

Calabrese

Mastronardo

et al. 2018

J of Applied Polymer Sci

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Sorption kinetics of pollutant oils, such as kerosene, virgin naphtha, crude oil, and pump oil, into porous siloxanic foams filled with carbon nanotubes (CNTs) are investigated. Both, pristine and functionalized, CNTs are used as foam fillers. Among all, the foam filled with pristine CNT shows a poor affinity with water and high sorption rate in light oils, in which it achieves the highest absorption values (7991 mg g−1 after 660 s and 6685 mg g−1 after 420 s, respectively, in virgin naphtha and kerosene). The kinetic data are described by the pseudo‐first order, pseudo‐second order, Elovich and intraparticle diffusion models. Results show that chemisorption processes are rate limiting the sorption step. In fact, pseudo‐second order model better represents the equilibrium isotherm data. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47374.

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“…Pseudo‐second order kinetic model, usually applied for solid–liquid systems, is defined according with the following expression:

\frac{d q_{t}}{dt} = K_{2} {(q_{e} - q_{t})}^{2}

…”

Section: Sorption Kinetics Modelsmentioning

confidence: 99%

“…Elovich's equation, based on the sorption capacity, is typically expressed as:

\frac{{italicdq}_{t}}{dt} = α e^{- β q_{t}}

Section: Sorption Kinetics Modelsmentioning

confidence: 99%

“…The Weber's intraparticle diffusion model is widely used to evaluate the main aspects of diffusion mechanisms. This model is defined according to the following equation:

q_{t} = K_{id} t^{1 / 2} + C

Section: Sorption Kinetics Modelsmentioning

confidence: 99%

“…Chemisorption process results rate limiting in the sorption test. Later, they conducted the same kinetics study on nitrophenols/expanded perlite systems . Bastani et al .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Piperopoulos

Calabrese

Mastronardo

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The zero surface charge (pHPZC) of zeolite was determined, using the solid addition method [9,10]. The microscope morphological analyses of zeolite were conducted by a digital microscope at 500× magnification.…”

Section: Zeolite Characterizationmentioning

confidence: 99%

Study on the host-guest interactions during caffeine encapsulation into zeolite

2015

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The objective of this study was to investigate the equilibrium and kinetics behavior, sorption mechanism and host-guest interactions during caffeine (CAF) encapsulation in natural zeolite. The chemical, spectral and morphological properties of the newly obtained drug-carrier system were analyzed. Zeolite surface chemistry and morphology were characterized by determination of pH of zero charge, FT-IR and digital microscopy analyses. Equilibrium and kinetic sorption experiments and modeling were conducted to assess zeolite potential. Satisfactory extend of CAF encapsulation in the zeolite matrix (E 36.4%) was obtained. The probable host-quest interactions include Van der Waals interactions, H-bonds and chemical interactions between CAF functional groups and zeolite silanol groups, as well as parallel intraparticle diffusion of drug molecules in the mesopores of the mineral particles. The analyses of the experimental results indicated that natural zeolite could be successfully applied for encapsulating CAF.

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Plasma modification of a natural zeolite to improve its adsorption capacity of strontium ions from water samples

Mirzaei

Almasian

Mousavian

et al. 2018

Int. J. Environ. Sci. Technol.

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Low-temperature plasma-modified zeolite (LTPMZ) vs. natural Bulgarian zeolite (NBZ) – Comparative physicochemical, UV/VIS and FTIR studies

Cited by 4 publications

References 11 publications

Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Study on the host-guest interactions during caffeine encapsulation into zeolite

Plasma modification of a natural zeolite to improve its adsorption capacity of strontium ions from water samples

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