Glutaraldehyde-crosslinked poly(vinyl alcohol)/halloysite composite films as adsorbent for methylene blue in water

Nambiar, Anargha P.; Pillai, Rahul; Vadikkeettil, Yugesh; Sanyal, Mallika; Shrivastav, Pranav S.

doi:10.1016/j.matchemphys.2022.126752

Cited by 16 publications

(14 citation statements)

References 55 publications

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“…Table 4 provides the details about adsorption capacities and other associated variables pertaining to the starch-based hybrid adsorbents that are reported for MB, and some food dyes. 2,16,17,19,23,29,30,32,38,40,41,44,61,62 Thus, it is evident that the prepared composite which is natural, biodegradable, and non-toxic yielded good adsorption capacity for MB (604 mg g −1 ). Moreover, it offers an economical option due to its regeneration capability.…”

Section: Resultsmentioning

confidence: 93%

“…As the value is less than 84 kJ mol −1 it further supports physisorption between the dye molecules and composite flakes. 44 The Δ S 0 values demonstrate the uneven increase in disorder on the solid–liquid junction during adsorption. These observations agreed with the outcomes of the adsorption isotherm and kinetics study.…”

Section: Resultsmentioning

confidence: 98%

“…Besides, the peaks found at 993 cm −1 , 918 cm −1 , and 867 cm −1 are exclusively for the C–O bond of the anhydroglucose ring. 44,48,50…”

Section: Resultsmentioning

confidence: 99%

“…Besides, the peaks found at 993 cm −1 , 918 cm −1 , and 867 cm −1 are exclusively for the C-O bond of the anhydroglucose ring. 44,48,50 For HNT, the frequencies at 3693 and 3623 cm −1 denote the stretching vibrations of the inner hydroxy group connected to Al atoms. The OH stretching and deformation vibrations of water molecules found in the inner layer exhibit peaks at 3548 and 1647 cm −1 , respectively.…”

Section: Functional Group Analysismentioning

confidence: 99%

“…43 Recently, we reported a glutaraldehydecrosslinked PVA/halloysite composite lm for adsorption of MB from aqueous medium. 44 Various chitosan based adsorbent materials and biosorption technologies have been employed in treating wastewater containing dyes and metals. [45][46][47] Herein, we report the preparation of starch-HNT composite akes using solution casting methodology for the rst time.…”

Section: Introductionmentioning

confidence: 99%

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A starch based sustainable bio-hybrid composite for surface assimilation of methylene blue: preparation, characterization, and adsorption study

Nambiar

Pillai

Sanyal

et al. 2023

Environ. Sci.: Adv.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 98%

“…Besides, the peaks found at 993 cm −1 , 918 cm −1 , and 867 cm −1 are exclusively for the C–O bond of the anhydroglucose ring. 44,48,50…”

Section: Resultsmentioning

confidence: 99%

Section: Functional Group Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A starch based sustainable bio-hybrid composite for surface assimilation of methylene blue: preparation, characterization, and adsorption study

Nambiar

Pillai

Sanyal

et al. 2023

Environ. Sci.: Adv.

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Adsorptive removal of methylene blue dye using durian peel waste reinforced polyvinyl alcohol‐based composite membrane

Pham,

Nguyen,

Phung

et al. 2024

J of Applied Polymer Sci

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A large amount of dye effluents with biodegradable and highly toxic nature from the dyeing and finishing processes has discharged into natural water bodies without adequate treatment, which adversely impacted on aquatic life and human health. Herein, polyvinyl alcohol/agarose/maltodextrin composite membrane (PAM)‐reinforced durian skin fiber is fabricated for methylene blue (MB) uptake from aqueous medium. Structural analyses of the as‐prepared composite membrane are conducted using scanning electron microscopy, Fourier‐transform infrared spectroscopy, water contact angle, and nitrogen adsorption/desorption isotherm measurement. The important influence of experimental conditions including exposure time between adsorbates and adsorbents, initial MB concentration, solution temperature, and pH are also explored. Furthermore, thermodynamic behavior, nonlinear isotherms, and kinetics along with possible adsorption mechanism are provided to attain the insight into the adsorption nature. The results show that PAM‐reinforced durian peel waste possesses high MB adsorption capacity (105.54 mg g−1), which was controlled by diffusion and chemisorption mechanism. The thermodynamics of methyl blue removal on the composite membrane suggest that the adsorption is spontaneous, favorable, and endothermic in nature. This contribution is expected to inspire the efficient utilization of agriculture by‐products into eco‐friendly and biodegradable adsorbents to purify the dye‐contaminated water.

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Polyvinyl alcohol/polyethyleneimine grafted carbon oxynitride composite nanofiber membranes with the synergistical enhanced photocatalytic degradation and bactericidal performance

Bai,

Luan,

Song

et al. 2024

J of Applied Polymer Sci

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Graphitic carbon nitride (g‐C3N4) has received much attention as a metal‐free photocatalyst for dye degradation and sterilization. However, the low photocatalytic bactericidal activity and the difficulty in recycling have limited its applications. Here, oxidatively modified g‐C3N4 grafted with polyethyleneimine (PEI) nanofiber membranes (PVA/PEI‐OCN) was reported to enhance the photocatalytic activity. The modification by PEI grafting could reduce the recombination rate of photogenerated carriers and lead to more electrons for the photocatalytic reaction. In addition, electron spin resonance (ESR) results showed that the generation of reactive oxygen species (˙OH, ˙O2− and 1O2) were significantly enhanced in photocatalysis, leading to the significant enhancement of photocatalytic bactericidal activity and dye degradation. Furthermore, the PVA/PEI‐OCN nanofiber membranes prepared by electrospinning had smooth surfaces and uniform fiber formation, with an average diameter of 380 ± 60 nm. The tensile strength was about 73.5% higher than that of PVA nanofiber membranes. The inhibition diameter of PVA/PEI‐OCN‐4 against Escherichisa coli (E. coil) could reach 20 ± 0.2 mm, and the maximum degradation efficiency of methylene blue solution (10 mg/L) could reach 92.8% within 120 min. This work provided an effective paradigm for the rational design of metal‐free photocatalytic materials for elimination of bacterial and dye contamination.

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Glutaraldehyde-crosslinked poly(vinyl alcohol)/halloysite composite films as adsorbent for methylene blue in water

Cited by 16 publications

References 55 publications

A starch based sustainable bio-hybrid composite for surface assimilation of methylene blue: preparation, characterization, and adsorption study

A starch based sustainable bio-hybrid composite for surface assimilation of methylene blue: preparation, characterization, and adsorption study

Adsorptive removal of methylene blue dye using durian peel waste reinforced polyvinyl alcohol‐based composite membrane

Polyvinyl alcohol/polyethyleneimine grafted carbon oxynitride composite nanofiber membranes with the synergistical enhanced photocatalytic degradation and bactericidal performance

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