Sodium alginate grafted hydrogel for adsorption of methylene green and use of the waste as an adsorbent for the separation of emulsified oil

Subhan, Hanif; Alam, Sultan; Shah, Luqman Ali; Khattak, Noor Saeed; Zekker, Ivar

doi:10.1016/j.jwpe.2021.102546

Cited by 43 publications

(18 citation statements)

References 58 publications

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“…The swelling behavior of the superabsorbent was examined at 298 K using both tap and distilled water (at pH 7). The swelling behavior of the ter-polymer was also studied at various pH (pH 4, pH 7, pH 9, pH 11) using the gravimetric method, as previously documented. , The procedure involved was as follows: taking a precisely weighed dry sample of the hydrogel and immersing it in separate containers with 200 mL of distilled and tap water. The weight of the hydrogel was recorded at specific time intervals, after every 30 min, until a constant weight was achieved.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Poly(GG-co-AAm-co-MAA), a Terpolymer Hydrogel for the Removal of Methyl Violet and Fuchsin Basic Dyes from Aqueous Solution

Khan,

Rahman,

Alam

et al. 2024

ACS Omega

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A novel adsorbent designated as terpolymer hydrogel (gellan gum-coacrylamide-co-methacrylic acid) was prepared by free radical polymerization of gellan gum (GG), methacrylic acid (MAA), and acrylamide (AAm) using N,N-methylene bisacrylamide (MBA) as cross-linker and ammonium per sulfate (APS) as the initiator of the reaction. The synthesized gel was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer− Emmett−Teller (BET), and thermogravimetric analysis (TGA) and was used for the adsorptive removal of methyl violet (MV) and Fuchsin Basic (FB) dyes from aqueous solution. The effect of temperature, contact time, pH, and concentration on them under the study adsorption process was evaluated. Freundlich isotherm and pseudo-second-order kinetic models were found to be best in fitting the isothermal and kinetics data. The water diffusion and % swelling of hydrogel were studied at various pH in distilled water and at neutral pH in tap water. The diffusion was found to be of Fickian type with a maximum swelling of 5132%. The maximum adsorption capacity was 233 mg/g against MV and 200 mg/g against FB dyes. The swelling and adsorption were pH dependent and increased with increase in pH. The enthalpy, Gibbs free energy, and entropy changes of adsorption for both the dyes indicated the adsorption process to be exothermic, feasible, and spontaneous. The hydrogel was successfully regenerated using acetone and distilled water for five cycles and still, its dye removal efficiency was 80% of its original value. The poly(GG-co-AAm-co-MAA) hydrogel successfully removed the selected dyes from water and could thus be used as an efficient alternative sorbent for cationic dye removal from aqueous solutions.

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Section: Methodsmentioning

confidence: 99%

Synthesis of Poly(GG-co-AAm-co-MAA), a Terpolymer Hydrogel for the Removal of Methyl Violet and Fuchsin Basic Dyes from Aqueous Solution

Khan,

Rahman,

Alam

et al. 2024

ACS Omega

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“…The ability of adsorbing methyl green of the adsorption membrane produced from the cellulosic fraction of the Ziziphus lotus was much higher than the one reported by other authors for adsorbents such as graphite oxide, loofah fibers or bamboo (29.4 mg/g, 18.2 mg/g and 15.5 mg/g, respectively) [60][61][62]. Nevertheless, there are adsorbents such as the graphene sheets and the sodium alginate hydrogel, which presented higher than that of PA-CMC adsorption membrane prepared from Zizyphus lotus (203.5 mg/g and 1915 mg/g respectively [60,63].…”

Section: Effect Of Different Adsorption Parametersmentioning

confidence: 99%

Cross-Linked Carboxymethylcellulose Adsorbtion Membranes from Ziziphus lotus for the Removal of Organic Dye Pollutants

et al. 2022

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The goal of this study is to assess Ziziphus lotus’s potential for producing carboxymethylcellulose adsorption membranes with the ability to adsorb methyl green from wastewaters by the revalorization of its cellulosic fraction. The cellulose from this feedstock was extracted by an alkaline process and TAPPI standard technique T 203 cm-99 and afterwards they were carboxymethylated. The obtained carboxymethylcelluloses were deeply characterized, being observed that the carboxymethylcellulose produced from the alkaline cellulose presented the higher solubility due to its lower crystallinity degree (53.31 vs. 59.4%) and its higher substitution degree (0.85 vs. 0.74). This carboxymethylcellulose was cross-linked with citric acid in an aqueous treatment in order to form an adsorption membrane. The citric acid provided rigidity to the membrane and although it was hydrophilic it was not soluble in water. By evaluating the potential of the produced membrane for the removal of pollutant dyes from wastewater, it was observed that the adsorption membrane prepared from the carboxymethylcellulose’s produced from the Ziziphus lotus was able to remove 99% of the dye, methyl green, present in the wastewater. Thus, this work demonstrates the potential of the Ziziphus lotus for the production of a novel and cost-effective carboxymethylcellulose adsorption membrane with high capacity to treat wastewaters.

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“…Thus, the proper handling of dye waste has become an urgent project. The current treatments of the dye contaminated wastewater involve physical and chemical methods 4–6 . Among them, physical methods mainly include dye absorption in wastewater solution 7 and membrane filtration, 8 whereas the chemical methods generally degrade dyes in wastewater with the help of various materials, 9 electrolysis, 10 oxidation techniques 11 and photocatalytic approaches 12–15 .…”

Section: Introductionmentioning

confidence: 99%

“…The current treatments of the dye contaminated wastewater involve physical and chemical methods. [4][5][6] Among them, physical methods mainly include dye absorption in wastewater solution 7 and membrane filtration, 8 whereas the chemical methods generally degrade dyes in wastewater with the help of various materials, 9 electrolysis, 10 oxidation techniques 11 and photocatalytic approaches. [12][13][14][15] Compared to the chemical treatments, the physical methods are relatively simple, with the possibly to recycle and reuse the absorbed dyes by desorption of the material via certain techniques, thus reducing the overall production cost.…”

Section: Introductionmentioning

confidence: 99%

UV‐initiated preparation and absorption properties of pseudo‐polyrotaxane cyclodextrin‐based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel

Simayi,

Jiang,

Sawut

et al. 2023

Polymers for Advanced Techs

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The recycling of dyes from dye wastewater is one of the most challenging problems in wastewater treatment. In this study, a pseudo‐polyrotaxane cyclodextrin based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel was prepared by UV‐initiated polymerization. The network structure of the hydrogel and the performance on the dye absorption were adjusted by controlling the content of cyclodextrin. The study was mainly focused on the absorption of methylene blue (MB) in different environments, selectivity of absorption in mixed solutions and the cyclic absorption behavior. At room temperature, the absorption efficiency of this hydrogel for MB and methylene green reached 91.37% and 94.23%, respectively. In addition, the hydrogel exhibited highly selective absorption towards MB in mixed dye solutions. In the absorption‐desorption cyclic experiments, a more cost‐effective and environmental friendly solvent, a mixture of ethanol and water, was used, and after ten cycles, the highest absorption efficiency was basically maintained. Hence, the hydrogel is expected to be a candidate for more efficient and economical absorbent material in dye wastewater treatment.

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Sodium alginate grafted hydrogel for adsorption of methylene green and use of the waste as an adsorbent for the separation of emulsified oil

Cited by 43 publications

References 58 publications

Synthesis of Poly(GG-co-AAm-co-MAA), a Terpolymer Hydrogel for the Removal of Methyl Violet and Fuchsin Basic Dyes from Aqueous Solution

Synthesis of Poly(GG-co-AAm-co-MAA), a Terpolymer Hydrogel for the Removal of Methyl Violet and Fuchsin Basic Dyes from Aqueous Solution

Cross-Linked Carboxymethylcellulose Adsorbtion Membranes from Ziziphus lotus for the Removal of Organic Dye Pollutants

UV‐initiated preparation and absorption properties of pseudo‐polyrotaxane cyclodextrin‐based PVA/poly (acrylamide‐co‐acrylic acid) hydrogel

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