Synthesis and characterization of polyurethane-cellulose acetate blend membrane for chromium (VI) removal

Riaz, Tariq; Ahmad, Adnan; Saleemi, Sidra; Adrees, Muhammad; Jamshed, Fahad; Hai, Abdul; Jamil, Tahir

doi:10.1016/j.carbpol.2016.08.011

Cited by 74 publications

(30 citation statements)

References 28 publications

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“…Moawed et al (2017) succeeded in adding the filler of halogen and amino groups into the polyurethane foam matrix to adsorb Bi (III), Co (II), Fe (III), and Mo (III). Riaz et al (2016) also successfully modified polyurethane foam using cellulose acetate to adsorb Cr (VI). In this research, the polyurethane foam will be synthesized by the chitosan modification as a mercury metal adsorbent that has never been studied previously.…”

Section: Introductionmentioning

confidence: 99%

Syhnthesis of Chitosan Modified Polyurethane Foam for Adsoprtion of Mercury (Ii) Ions

Darmadi

Irfan

Iqhramullah

et al. 2018

JBAT

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Mercury from the traditional gold mining activities in Aceh Jaya Regency causes water source and thus residents are exposed to mercury metals. In organic and inorganic conditions, mercury is toxic to the human body, causes damage to the nerve system, kidney failure, heart failure, blood pressure disorders, and damage to the immune system. The problem of mercury contamination can be chemically solved in various ways. This research uses polyurethane foam to adsorb mercury from water. The adsorption and selectivity of polyurethane foam adsorption can be improved through modification with Chitosan. In this research, preheating temperature, glycerol and toluene di-isocyanate (TDI) compositions greatly affect the physical form of foam. The condition under which optimal glycerol composition used for synthesizing the polyurethane foams is 20% (w/w of mixture A). This glycerol composition results in polyurethane foams with an optimum ratio of the mixture A/TDI/distilled water of 2 : 1 : 1. The best adsorption is obtained with polyurethane foam added by 2.5% Chitosan. The optimum mercury adsorption 25% is resulted from the operating time of 60 minutes with adsorption capacity of 0.313 mg/g. For Chitosan modified polyurethane foam, research points out that the reaction is the second order reaction. The result concluded that the polymer has semi crystalline crystallization and melting temperatures.

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Section: Introductionmentioning

confidence: 99%

Syhnthesis of Chitosan Modified Polyurethane Foam for Adsoprtion of Mercury (Ii) Ions

Darmadi

Irfan

Iqhramullah

et al. 2018

JBAT

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“…Methods such as adsorption [7][8][9] , ion-exchange 10,11 , membrane separation 12,13 , coagulation 14 , chemical precipitation 15,16 , extraction 17 , dialysis 18 , and electrochemical separation 19 have been shown to be capable of removing heavy metal ions, including hexavalent chromium from wastewater. Of these different methods, adsorption is probably the most effective, economically feasible, environmentally sustainable, and technologically promising processes 20 .…”

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confidence: 99%

A systematic study of hexavalent chromium adsorption and removal from aqueous environments using chemically functionalized amorphous and mesoporous silica nanoparticles

Jang

Pack

Kim

et al. 2020

Sci Rep

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We report on the synthesis and characterization of highly monodisperse amorphous silica nanoparticles (ASNs) and mesoporous silica nanoparticles (MSNs) with particle sizes of 15-60 nm. We demonstrate adsorption of cr(Vi) ions on amino-functionalized ASns (nH 2-ASNs) and MSNs (NH 2-MSNs) and their removal from aqueous environments and show the specific surface area (SSA) of NH 2-MSNs is four times as larger as that of nH 2-ASNs and that more than 70% of the total SSA of NH 2-MSNs is due to the presence of nanopores. Analyses of Cr(VI) adsorption kinetics on NH 2-ASNs and NH 2-MSNs exhibited relatively rapid adsorption behavior following pseudo-second order kinetics as determined by nonlinear fitting. NH 2-ASNs and NH 2-MSNs exhibited significantly higher Cr(VI) adsorption capacities of 34.0 and 42.2 mg•g −1 and removal efficiencies of 61.9 and 76.8% than those of unfunctionalized ASNs and MSNs, respectively. The Langmuir model resulted in best fits to the adsorption isotherms of NH 2-ASns and nH 2-MSNs. The adsorption of Cr(VI) on NH 2-ASNs and NH 2-MSNs was an endothermic and spontaneous process according to the thermodynamic analyses of temperature-dependent adsorption isotherms. The removal efficiencies of NH 2-ASNs and NH 2-MSNs exhibited a moderate reduction of less than 25% of the maximum values after five regeneration cycles. Furthermore, NH 2-MSNs were also found to reduce adsorbed Cr(VI) into less harmful Cr(III).

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“…Phenol removal efficiency and other properties of CA membrane can be improved by using suitable additives [12]. Polyethylene amine, polyurethane and zwitterions are used as suitable blending materials with CA for efficient removal of Cu 2+ , Cr 6+ and protein as reported by Chen et al [18], Riaz et al [19] and Wang et al [20], respectively. Good phenol removal efficiency of ChCl is reported by deep eutectic method [21,22].…”

Section: Introductionmentioning

confidence: 99%

Phenol Removal by Novel Choline Chloride Blended Cellulose Acetate-Fly Ash Composite Membrane

Gupta

Chathurappan

Anandkumar

2019

Period. Polytech. Chem. Eng.

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A novel composite membrane (CM) was prepared by coating choline chloride (ChCl) blended cellulose acetate (CA) on fly-ash based ceramic substrate for phenol removal. Different amount (0-1 g) of ChCl was blended with CA to synthesize various CMs. Amount of ChCl in CA increases the contact angle, average pore radius, permeability of CM from 55.15° to 71.55°, 1.6 to 6.83 nm and 0.0057 to 0.0152 L·m−2·h−1·kPa−1, respectively. Phenol rejection increased from 56 to 93 % while increasing ChCl amount in CA. Phenol removal decreased from 94.26-64.23 % and 91.09-78.62 % with increase in applied pressure (69-483 kPa) and feed concentration (50-200 mg·L−1). However, removal rate increased from 80.46-92.47 % with increase in pH 2-12. Among all CMs, CC5 is identified as best CM with maximum phenol removal efficiency (92.7 %) and flux (1.86 L·m−2·h−1) at 207 kPa applied pressure and 100 mg·L−1 of feed phenol concentration. The obtained results reveal that blending of 0.9 % ChCl with CA can significantly enhances the phenol removal efficiency and this could be used as potential CM for treatment of phenol bearing wastewater.

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Synthesis and characterization of polyurethane-cellulose acetate blend membrane for chromium (VI) removal

Cited by 74 publications

References 28 publications

Syhnthesis of Chitosan Modified Polyurethane Foam for Adsoprtion of Mercury (Ii) Ions

Syhnthesis of Chitosan Modified Polyurethane Foam for Adsoprtion of Mercury (Ii) Ions

A systematic study of hexavalent chromium adsorption and removal from aqueous environments using chemically functionalized amorphous and mesoporous silica nanoparticles

Phenol Removal by Novel Choline Chloride Blended Cellulose Acetate-Fly Ash Composite Membrane

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