Polyurethane foam loaded with SDS for the adsorption of cationic dyes from aqueous medium: Multivariate optimization of the loading process

Robaina, Nicolle F.; Soriano, Silvio; Cassella, Ricardo J.

doi:10.1016/j.jhazmat.2009.01.033

Cited by 34 publications

(5 citation statements)

References 44 publications

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“…[10][11][12] The isocyanate reactivity can lead to the production of a wide range of products from solid elastomer to rigid and flexible foams and from coatings and adhesives to the fabrication of synthetic fibers. [13][14][15][16][17][18][19][20][21][22][23] Methylene diphenol diisocyanate (MDI) has two aromatic rings and has been used to synthesize the hard parts of polyurethane elastomers. [24][25][26] Polyethylene glycol (PEG) polyol is a watersoluble linear polymer and is used to form the soft parts of polyurethane.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and properties of a new polyurethane elastomer based on tragacanth gum polysaccharide

Badakhshanian

Ghaemy

2022

Journal of Elastomers & Plastics

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This study prepared a type of bio-based elastomeric polyurethane from tragacanth gum (TG). TG is a natural polysaccharide with many hydroxyl groups that can be used as a chain extender and a crosslinker to react with the isocyanate groups in polyurethane prepolymer to form a highly branched and crosslinked polyurethane with high molecular weight and good mechanical properties. The chemical structure of the prepolymer and the thermal and mechanical properties of the prepared polyurethane were studied by Fourier transform infrared, nuclear magnetic resonance, scanning electron microscopy, thermal gravimetric analysis, dynamic mechanical thermal analysis, and tensile strength tester. The properties of the polyurethane-based on TG (TG-PU) were compared with the properties of the PU based on only polyethylene glycol. The TG-PU sample with 0.5 g TG showed a tensile strength of 288% and the glass transition temperature (Tg) of 33% higher than the tensile strength and Tg of PU without TG. We expect these findings to widen the range of preparation and applications of bio-based polyurethane materials.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and properties of a new polyurethane elastomer based on tragacanth gum polysaccharide

Badakhshanian

Ghaemy

2022

Journal of Elastomers & Plastics

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“…Ossman, Professor, Petrochemical Engineering Department, Pharos University, Alexandria, Egypt M. Abdelfattah, Petrochemical Engineering Department, Pharos University, Alexandria, Egypt wastewater e.g. polyurethane [12][13][14][15][16] organo bentonite [17], carbon [18], Zn2Al-NO3 [19] and miswak [20]. Polyurethane foam (PF) is a good sorbent to remove some organic and inorganic pollutants from wastewater [21,22].…”

Section: Introductionmentioning

confidence: 99%

Polyurethane Composites for Dye and Heavy Metal Removal: (Adsorption Kinetics and Isotherms Studies)

2018

ICASET-18,ACBES-1,EEHIS-18 June 20-21, 2018 Paris (France)

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Abstract-The need to maintain a cleaner environment for the survival of both aquatic and terrestrial lives including human beings is very crucial and is a subject of increasing concern to the environmentalist. Pollution caused by agents such as heavy metals and organic pollutants are amongst the list which rendered the environment unwholesome and posed serious health concern to the populace. The removal of Heavy metals and organic pollutants from wastewater before their discharge in the environmental is very important due to its polluting effect on the underground water. This work dealt with the preparation and characterization of polyurethane foam composite with bentonite and CuO and the usage of these adsorbents in removing Eosin dye (as an organic pollutants) and Cd (heavy metal) from industrial wastewater using a batch operation system. Studying of the operating conditions namely; effects of contact time, dosage of adsorbent, initial concentration as well as effect of pH were carried out. Also kinetics and isotherm study that describe the adsorption process are carried out.

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“…Adsorption is the most effective technique because it is easy, inexpensive, can treat concentrated dyes, and the spent sorbent can be regenerated for further use [11]. The sorbents used to remove dyes from wastewater include polyurethane [12][13][14][15][16] organo-bentonite [17], carbon [18], Zn 2 Al-NO 3 [19] and miswak [20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of iodo polyurethane foam and its application in removing of aniline blue and crystal violet from laundry wastewater

Moawed

Abulkibash

El-Shahat

2015

Journal of Taibah University for Science

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A new sorbent was prepared by treating polyurethane foam with HCl and replacing the amino functional groups with iodine atoms. The properties of iodo-polyurethane were studied with infrared, ultraviolet and visible spectroscopy, bulk density, pH ZPC and elemental and thermal analysis. Removal of aniline blue and crystal violet dyes from water with iodo-polyurethane were investigated with the batch technique. Maximum removal was achieved at pH 7-12. The effect of the initial dye concentration on the equilibrium adsorption from aqueous solutions with iodo-polyurethane was found to have a good correlation, with r 2 = 0.995 and an intercept of 0.039 when analyzed in the Langmuir and Freundlich isotherm models. The capacity of iodo-polyurethane for aniline blue and crystal violet were 0.24 and 0.45 mmol g −1 , respectively (188.9 and 183.6 mg g −1). The values of G and H were −7.7 kJ mol −1 and −26.1 kJ mol −1 , respectively, indicating that sorption is spontaneous and exothermic. The sorption rate of the dyes onto iodo-polyurethane was rapid, with 50% removal within 50 s. The pseudo-second order equation best described the kinetics of absorbed aniline blue and crystal violet (r 2 = 0.994). A modified equation (y = ax 0.n) was used to treat deviation from the Morris-Weber model for the sorption diffusion mechanism of crystal violet onto iodo-polyurethane. Use of iodo-polyurethane for removing aniline blue and crystal violet contamination from laundry wastewater is thus possible.

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Polyurethane foam loaded with SDS for the adsorption of cationic dyes from aqueous medium: Multivariate optimization of the loading process

Cited by 34 publications

References 44 publications

Synthesis, characterization, and properties of a new polyurethane elastomer based on tragacanth gum polysaccharide

Synthesis, characterization, and properties of a new polyurethane elastomer based on tragacanth gum polysaccharide

Polyurethane Composites for Dye and Heavy Metal Removal: (Adsorption Kinetics and Isotherms Studies)

Synthesis and characterization of iodo polyurethane foam and its application in removing of aniline blue and crystal violet from laundry wastewater

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