Adsorption isotherm and kinetic modeling of a novel procedure for physical modification of silica gel using aqueous solutions of 4,4′-(1,2-ethanediyldinitrilo)bis-(2-pentanone) for preconcentration of Ni(II) ion

Nwabue, F. I.; Itumoh, E. J.

doi:10.1080/01496395.2019.1659821

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…For the above-mentioned reasons, the Temkin isotherm model was applied. This model describes the effects connected with indirect adsorbate/adsorbate interactions during the adsorption process and permits determination of the Temkin constant b that is related to the heat of sorption [56,57]. The linear version of Temkin isotherm is expressed as:…”

Section: Adsorption Isotherm Of Dox Adsorption On Pristine Mwcnts and Modified Mwcntsmentioning

confidence: 99%

Kinetic and Equilibrium Studies of Doxorubicin Adsorption onto Carbon Nanotubes

Chudoba

Łudzik

Jażdżewska

et al. 2020

IJMS

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This study provides deep insight into the adsorption process of doxorubicin onto different types of carbon nanotubes that have been proved to show attractive properties as a drug delivery system. The main aim of the work was to propose probable adsorption mechanisms and interactions between the anticancer drug and surface of modified and pristine carbon nanotubes at blood pH. The carbon nanotubes were oxidized to optimize the absorbance efficiency relative to that of pristine multiwalled carbon nanotubes. The adsorption isotherm of the modified system was well described by the Temkin equation. It confirms that the adsorption in the system studied involves also hydrogen and covalent bonding and is exothermic in nature. The experimental kinetic curves of adsorption were fitted to different mathematical models to check if the kinetics of doxorubicin adsorption onto the modified multiwalled carbon nanotubes follows a pseudo-second-order model and the chemical sorption is bound to be the rate-limiting. On the basis of the molecular dynamics simulation, it was shown that in vacuo the aggregation tendency of doxorubicin molecules is far more favorable than their adsorption on pristine carbon nanotubes (CNTs). It suggests that only functionalization of the nanotube surface can affect the interaction between doxorubicin and functional groups of the carriers and increases the efficiency of the drug loading process.

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Section: Adsorption Isotherm Of Dox Adsorption On Pristine Mwcnts and Modified Mwcntsmentioning

confidence: 99%

Kinetic and Equilibrium Studies of Doxorubicin Adsorption onto Carbon Nanotubes

Chudoba

Łudzik

Jażdżewska

et al. 2020

IJMS

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show abstract

“…The pseudo-second-order model is better suited to describe the adsorption kinetics of caffeine onto the PSP, which also suggests that the adsorption process was governed by chemical adsorption 35 . The good fitting coefficients of the Elovich model are also an indicator of a chemisorption process 14,36,37 . Furthermore, achieving a good fit to the Elovich model holds significant recognition as evidence of sorption site heterogeneity 38 .…”

Section: Removal Experimentsmentioning

confidence: 99%

Porous sulfur polymers for effective aqueous-phase organic contaminant removal

Diniz,

Bear,

Rath

et al. 2024

Sci Rep

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Sulfur polymers produced through 'inverse vulcanization' exhibit various attributes, such as photocatalytic activity and a high capacity to adsorb heavy metals. Nevertheless, there is a lack of research investigating the use of sulfur polymers as materials for the removal of organic contaminants. In this work, porous sulfur polymers (PSPs) were synthesized from elemental sulfur and 1,3-diisopropenylbenzene, with porosity introduced via salt templating. The result is a material that can strongly adsorb and chemically neutralize a model organic contaminant (caffeine). PSPs show adsorption up to 5 times higher than a leading adsorption material (activated carbon). Furthermore, either the adsorption or degradation processes can govern the removal efficiency depending on the synthesis parameters of PSPs. This is the first-ever report demonstrating sulfur polymers as effective materials for removing emerging contaminants from water. The versatile synthesis of sulfur polymers offers variation, which means that there is much more to explore in this exciting research area.

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“…The good tting coe cients of the Elovich model are also an indicator of a chemisorption process 18,32,33 . Furthermore, achieving a good t to the Elovich model holds signi cant recognition as evidence of sorption site heterogeneity 34 .…”

Section: Kinetics Studies and Isotherm Studiesmentioning

confidence: 99%

Porous sulfur polymers for effective aqueous-phase organic contaminant removal – a low-cost sustainable material

Crick,

Diniz,

Bear

et al. 2023

Preprint

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Emerging contaminants in supposably potable water supplies are a global and growing concern. Maintaining conventional water treatment approaches to tackle growing contamination levels would mean exponentially increasing treatment costs, with some contaminants circumventing these efforts altogether. New approaches for water treatment are therefore required. Sulfur polymers made by “inverse vulcanization” are a highly promising candidate material for this purpose. In this work, porous sulfur polymers (PSPs) were synthesized from elemental sulfur and 1,3-diisopropenylbenzene, with porosity introduced via salt templating. The result is a material that can strongly absorb and chemically neutralize a model contaminant (caffeine). PSPs show adsorption up to 5 times higher than a leading adsorption material (activated carbon). This is the first-ever report demonstrating sulfur polymers as effective materials for removing emerging contaminants from water. The versatile synthesis of sulfur polymers offers variation, which means that there is much more to explore in this exciting research area.

show abstract

Adsorption isotherm and kinetic modeling of a novel procedure for physical modification of silica gel using aqueous solutions of 4,4′-(1,2-ethanediyldinitrilo)bis-(2-pentanone) for preconcentration of Ni(II) ion

Cited by 11 publications

References 31 publications

Kinetic and Equilibrium Studies of Doxorubicin Adsorption onto Carbon Nanotubes

Kinetic and Equilibrium Studies of Doxorubicin Adsorption onto Carbon Nanotubes

Porous sulfur polymers for effective aqueous-phase organic contaminant removal

Porous sulfur polymers for effective aqueous-phase organic contaminant removal – a low-cost sustainable material

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