Preparation, characterization and applications of novel iminodiacetic polyurethane foam (IDA-PUF) for determination and removal of some alkali metal ions from water

El‐Shahat, M. F.; Moawed, E.A.; Burham, N.

doi:10.1016/j.jhazmat.2008.03.087

Cited by 17 publications

(10 citation statements)

References 23 publications

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“…The experimental data were represented by the linear plot of C e /q e versus C e , as in Figure 10 a. The Freundlich model was identified to decide the adsorption density of chlorpyrifos not only towards uniform adsorption, but to include multilayer and was determined by [ 43 ]: logq e = logK f + 1/n (logC e ) where K f and n are the Freundlich constants. The value of n suggests the affinity of CPF towards the adsorbent.…”

Section: Resultsand Discussionmentioning

confidence: 99%

“…Since 1/n value is close up unity (1/n = 1.085), the adsorption efficiency becomes more feasible with lower concentrations of adsorbate, as well as is more effective at higher concentrations and vice versa. For PUFS, the linear plot of the Freundlich model yielded the best R 2 value for CPF sorption (R 2 = 0.9952), which was higher when compared to white PUF [ 43 ]. Based on the heterogeneous structure of PUFS, the adsorption process was not onto a monolayer surface rather multilayer sorption performed in the PUFS–CPF system.…”

Section: Resultsand Discussionmentioning

confidence: 99%

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Sorption Features of Polyurethane Foam Functionalized with Salicylate for Chlorpyrifos: Equilibrium, Kinetic Models and Thermodynamic Studies

Bouraie

Abdelghany

2020

Polymers

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Commercial polyurethane foam was treated with salicylate salt to synthesize PUFSalicylate (PUFS) as a novel, promising, stable and inexpensive adsorbent for chlorpyrifos (CPF) extraction. The properties of PUFS were investigated using UV–Vis spectroscopy, apparent density, FTIR spectroscopy, pHZPC, BET surface area, elemental analysis, TGA and DTG tests. Batch experiments were performed for the sorption of CPF under different salicylate concentrations, pH, shaking time, ionic strength, agitation speed, sorbent mass, batch factor and initial concentration of CPF. The results confirmed that 97.4% of CPF in a 25 mL solution, 10 μg/L concentration, could be retained by only 0.3 mg of PUFS (1:105mass ratio of PUFS: solution). In addition, the maximum capacity of PUFS for the sorption of CPF was 1249.8 μg/mg (3.9 × 10−5 mol/g) within 180 min. The negative values of ΔH° and ΔG° indicated that the sorption of CPF onto PUFS is an exothermic spontaneous process (favorable). The calculated data from the experimental procedures fitted perfectly with Freundlich isotherm (R2 = 0.9952) and the kinetic Equation of pseudo-second order. In addition, the R2 value in the Elovich Equation recorded higher when compared to the Morris–Weber and Bangham Equations; hence, the pore diffusion is not the rate-determining step. Thus, the use of PUFSalicylate for the removal of chlorpyrifos contaminations from agriculture runoff is applicable.

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Section: Resultsand Discussionmentioning

confidence: 99%

Section: Resultsand Discussionmentioning

confidence: 99%

Sorption Features of Polyurethane Foam Functionalized with Salicylate for Chlorpyrifos: Equilibrium, Kinetic Models and Thermodynamic Studies

Bouraie

Abdelghany

2020

Polymers

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“…The PUF is an excellent sorbent material due to its high available surface area and extremely low cost. In addition, it is stable in acids and bases, it will not change its structure when heated up to 180°C (El-Shahat et al, 2008;Moawed, 2006). Thus, it is a very suitable material for batch and column techniques.…”

Section: Introductionmentioning

confidence: 99%

Separation and determination of iron and manganese in water using polyhydroxyl polyurethane foam

Moawed

Burham

El‐Shahat

2013

Journal of the Association of Arab Universities for Basic and A

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The polyhydroxyl-polyurethane foam (PPF) was used as a new sorbent for separation, preconcentration and determination of manganese and iron ions in natural samples. Experimental conditions for effective separation of trace levels of the metal ions were optimized with respect to different experimental parameters in batch and dynamic processes. The maximum sorption of Mn(II) and Fe(III) was in the pH range of 6-8. The kinetics of sorption of the Mn(II) and Fe(III) by the PPF was found to be fast with an average value of half-life of sorption (t 1/2) of 11.7 min. The sorption capacity of PPF was 8.7 lmol g À1 and the recovery of tested ions 99-100% was achieved. The lower detection limit, 0.08 lg L À1 was evaluated using spectrophotometric method. The relative standard deviation (RSD) under optimum conditions is 1.3% (n = 5). The bonding of the studied metal ions by the PPF is useful for the removal of metal contamination from real samples.

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“…It has a high surface area, an extremely low cost, is stable in both acids and bases and stable up to 180 °C [22,23]. Thus, it is a very suitable material for batch and column extraction techniques.…”

Section: Introductionmentioning

confidence: 99%

Determination of azine and triphenyl methane dye in wastewater using polyurethane foam functionalized with tannic acid

Moawed¹,

Alqarni²

2013

Sample Preparation

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A simple and sensitive spectrophotometric method for the determination of azine (neutral red) and triphenyl methane (rosaniline) dye has been developed using tannic acid-polyurethane foam (TPF). TPF was prepared by coupling a polyhydroxypolyurethane foam matrix with tannic acid. TPF was characterized using a combination of analytical methods including IR and NMR spectroscopy, elemental analysis, density and pH ZPC . The qualitative and quantitative determination of dyes is based on its sorption on the surface of the TPF. The sorption behavior of dye onto the TPF was investigated by batch and dynamic processes. The maximum sorption of neutral red and rosaniline was in the pH range of 7-9. The kinetics of sorption of the dye by the TPF was found to be fast with average values of half-life of sorption of 1.2 min. The equilibrium process was well described by the Freundlich isotherm model. The visual detection limit of dye in aqueous solution is 0.1 μg mL -1 . The Sandell's sensitivity is 0.26 ng cm -2 with molar absorptivity 1.3 × 10 6 L mol -1 cm -1 . The average sorption capacity of TPF and the recovery of dyes were 0.47 mmol g -1 and 96.4 % (RSD ~ 1.5%, n=7). The method has been applied to various wastewater samples. KeywordsPolyurethane foam • Tannic acid • Neutral red • Rosaniline • Dye removal © Versita Sp. z o.o.

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Preparation, characterization and applications of novel iminodiacetic polyurethane foam (IDA-PUF) for determination and removal of some alkali metal ions from water

Cited by 17 publications

References 23 publications

Sorption Features of Polyurethane Foam Functionalized with Salicylate for Chlorpyrifos: Equilibrium, Kinetic Models and Thermodynamic Studies

Sorption Features of Polyurethane Foam Functionalized with Salicylate for Chlorpyrifos: Equilibrium, Kinetic Models and Thermodynamic Studies

Separation and determination of iron and manganese in water using polyhydroxyl polyurethane foam

Determination of azine and triphenyl methane dye in wastewater using polyurethane foam functionalized with tannic acid

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