Kinetics and thermodynamic characteristics of cadmium(II) sorption from water using procaine hydrochloride physically impregnated polyurethane foam

El-Shahawi, M.S.; Alwael, H.; Arafat, Ahmed; Al-Sibaai, A.A.; Bashammakh, Abdulaziz S.; Al-Harbi, Eman A.

doi:10.1016/j.jiec.2015.01.025

Cited by 16 publications

(6 citation statements)

References 37 publications

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“…Polyurethane foams (PUFs) and foams immobilized with supporting solvent extractants, chelating agents, liquid ion exchangers, anchored extracting groups and powdered ion exchangers sorbents have been reported for pre-concentration and separation of various inorganic and organic species from different media [16][17][18][19][20][21][22]. The most distinctive features of PUFs as solid sorbents are their membrane-like structure which differentiates them from others [20][21][22]. The foam membranes act as sorbents, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Al-Bagawi¹,

Ahmad²,

Alwael³

et al. 2019

Chemometrics and Data Analysis in Chromatography

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A simple method has been developed for quantitative retention of traces of mercury(II) ions from aqueous media using polyurethane foams (PUFs) loaded with 4-(2-thiazolylazo) resorcinol (TAR). The kinetics and thermodynamics of the sorption of mercury(II) ions onto PUFs were studied. The sorption of mercury(II) ions onto PUF follows a first-order rate equation with k = 0.176 ± 0.010 min −1. The negative values of ΔH and ΔS may be interpreted as the exothermic chemisorption process and indicative of a faster chemisorption onto the active sites of the sorbent. The sorption data followed Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherm models. The D-R parameters β, K DR and E were 0.329 mol 2 kJ −2 , 0.001 μmol g −1 and 1.23 ± 0.07 kJ/mol for the TAR-loaded PUFs, respectively. An acceptable retention and recovery (99.6 ± 1.1%) of mercury(II) ions in water at ≤10 ppb by the TAR-treated PUFs packed columns were achieved. A retention mechanism, involving absorption related to "solvent extraction" and an "added component" for surface adsorption, was suggested for the retention of mercury(II) ions by the used solid phase extractor. The performance of TAR-immobilized PUFs packed column in terms of the number (N), the height equivalent to a theoretical plate (HETP), the breakthrough and critical capacities of mercury(II) ion uptake by the sorbent packed column were found to be 50.0 ± 1.0, 1.01 ± 0.02 mm, 8.75 and 13.75 mg/g, respectively, at 5 mL/min flow rate.

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Section: Introductionmentioning

confidence: 99%

“…Moreover, the PUFs membranes offer a wider range of chemical modifications than normal bulky (granular) solids [17,20]. The potentialities of the PUF solid quasi-spherical membrane geometry sorbent have been reported [21,22].…”

Section: Introductionmentioning

confidence: 99%

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Al-Bagawi¹,

Ahmad²,

Alwael³

et al. 2019

Chemometrics and Data Analysis in Chromatography

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“…Molecular transport characteristics of polymer membranes have been extensively studied by many researchers. [9][10][11][12][13][14][15] Studies on transport of aliphatic and aromatic probe molecules in cross-linked polystyrene (PS) have been carried out by Kim et al 18 Transport behavior of chain-extended PUs has been studied by Kendaganna Swamy and Siddaramaiah. 19 PUs have been prepared by different diisocyanates and their effect on sorption behavior have been carried out by Satheesh and co-workers.…”

Section: Introductionmentioning

confidence: 99%

“…The sorption process and mechanisms of transport depend on polymeric structure, polymer compositions, and morphology related to physical and mechanical nature of polymers. Hence, it is important to analyze the transport behaviors of polymer–organic penetrant systems, with great interest by various researchers . The interaction of filler and polymer, penetrant size, temperature, and nature of polymer and solvent will strongly influence transport behaviors of polymer composites.…”

Section: Introductionmentioning

confidence: 99%

“…The interaction of filler and polymer, penetrant size, temperature, and nature of polymer and solvent will strongly influence transport behaviors of polymer composites. Molecular transport characteristics of polymer membranes have been extensively studied by many researchers . Studies on transport of aliphatic and aromatic probe molecules in cross‐linked polystyrene (PS) have been carried out by Kim et al .…”

Section: Introductionmentioning

confidence: 99%

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Restricted Equilibrium Swelling of n‐Alkanes Posed by Ginger Spent Filled Polyurethane Green Composites during Sorption, Desorption, Resorption, and Redesorption Processes

Chethana¹,

Siddaramaiah²

2016

Adv Polym Technol

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Polyurethane (PU) based green composites with varying amounts of ginger spent (GS) have been fabricated and characterized for swelling and molecular transport behaviors in n-alkane probe molecules. Sorption-desorption-resorptionredesorption (S-D-RS-RD) behaviors have been performed to determine the true factor for transport coefficient. Sorption results are obtained by a gravimetric method and diffusion coefficient (D) has been calculated using Fick's equation for the linear data points of time-dependent sorption/resorption curves. The observation was made that diffusion coefficient follows Fick's rule. Sorption studies have been carried out at 25, 40, and 60°C. A significant increase in sorption values has been noticed with raise in temperature. Sorption (S) and diffusion (D) coefficients of n-alkanes depend on GS content in PU matrix. From the temperature dependence of diffusion and permeation (P) coefficients, the Arrhenius activation parameters have been used to estimate activation parameters such as diffusion (E D ) and permeation (E P ). Thermodynamic parameters such as enthalpy ( H) and entropy ( S) have been interpreted for sorption/resorption results. The percentage weight change for desoption and redesorption processes has been recorded; these results depend on the volatility of the penetrant molecules. C

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Kinetics and thermodynamics adsorption of Oxazepam drug on the multi‐walled carbon nanotube

Mohammadi

Vadi

Bagehri

et al. 2021

J Chinese Chemical Soc

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Nowadays, it is admitted to using of suitable carrier results in improving drug delivery such as nanotubes. So, multi-walled carbon nanotube (MWCNTs) has been proposed as a carrier (adsorbent) to improve the neurological Oxazepam (OZ) drug delivery. Freundlich, Temkin, and Langmuir isotherm models have been used in order to do assay adsorption of the OZ on the MWCNT. The maximum value of the isotherm constant (b = 0.14 L/mg) at 303 K temperature indicates stronger (better) adsorption of the OZ on the MWCNT surface in low concentrations (20 mg/L) and acidic pH; in fact, increasing of pH led to decreasing adsorption (60 ! 35.91 mg/g) and dehydrogenation of the OZ drug. Reaching to the equilibrium state after 90 min and negative value of the ΔH (−41.57 kJ/mol) shows that the OZ adsorption has fast kinetic and exothermic processes. These issues imply depending of the OZ adsorption on the OZ concentration and the weight of adsorbent in the adsorption process.

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Kinetics and thermodynamic characteristics of cadmium(II) sorption from water using procaine hydrochloride physically impregnated polyurethane foam

Cited by 16 publications

References 37 publications

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Restricted Equilibrium Swelling of n‐Alkanes Posed by Ginger Spent Filled Polyurethane Green Composites during Sorption, Desorption, Resorption, and Redesorption Processes

Kinetics and thermodynamics adsorption of Oxazepam drug on the multi‐walled carbon nanotube

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