TiO2/guar gum hydrogel composite for adsorption and photodegradation of methylene blue

Santoso, Shella Permatasari; Angkawijaya, Artik Elisa; Bundjaja, Vania; Hsieh, Chang‐Wei; Go, Alchris Woo; Yuliana, Maria; Hsu, Hsien‐Yi; Tran‐Nguyen, Phuong Lan; Soetaredjo, Felycia Edi; Ismadji, Suryadi

doi:10.1016/j.ijbiomac.2021.10.044

Cited by 25 publications

(9 citation statements)

References 67 publications

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“…Further, previous findings suggest that at pH > 6 the positively charged dimethylamine groups become more prominent. 19,37 In the current study, the impact of pH (4−9) on MB dye adsorption was investigated (Figure 5c), whereas in cases of GG 1.55 /BX 0.84 and GG 1.55 /NC 1.46 /BX 0.84 hydrogels, the R % value gradually increased upon increasing the pH from 4 to 8. The GG 1.55 /BX 0.84 and GG 1.55 /NC 1.46 / BX 0.84 hydrogels exhibited maximum adsorption at pH 8 with the maximum R % of 84.12 and 98.8%, respectively, which may be attributed to the higher electrostatic interactions between MB dye molecules and −OH groups on the hydrogel surface.…”

Section: Effect Of Ph On Mb Adsorptionmentioning

confidence: 94%

“…The amorphous phase of GG in the case of GG 1.55 /BX 0.84 hydrogel was represented by a broad hump between the scattering angles of 10−40°, demonstrating the development of cross-linked GG, as also reported in previous studies. 19,45,46 Compared to GG 1.55 /BX 0.84 , the GG 1.55 /NC 1.46 /BX 0.84 hydrogel exhibited different XRD patterns with sharper and significant peaks at 16.5, 22.5, and 34.6°, attributed to the successful NC grafting and ultimately the higher crystallinity. The crystalline structure of the NCincorporated hydrogel was probably the consequence of significant intramolecular and intermolecular H-bonds formed by polymer chains, or the polymer chains and NC.…”

Section: Effect Of Ph On Mb Adsorptionmentioning

confidence: 98%

“…This used hydrogel was reused for the next dye adsorption cycle per above-described procedure until it completely degraded. 19 2.4. Adsorption Study of MB Dye on Hydrogel.…”

Section: Biodegradabilitymentioning

confidence: 99%

“…In some previous studies, maximum adsorption of MB ions was also noticed on the adsorbent surface in alkaline conditions due to the presence of protonated MB dimethyl amine molecules and vice versa. 19,38 3.4.4. Effect of Temperature on MB Adsorption.…”

Section: Effect Of Ph On Mb Adsorptionmentioning

confidence: 99%

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Nanocellulose-Based Ecofriendly Nanocomposite for Effective Wastewater Remediation: A Study on Its Process Optimization, Improved Swelling, Adsorption, and Thermal and Mechanical Behavior

Rana,

Anamika,

Sareen

et al. 2024

ACS Omega

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A nanocellulose (NC)-based cross-linked adsorbent has been employed herein for the removal of dye pollutants (e.g., methylene blue) from the textile industry. The synthesized hydrogel was optimized to achieve the best concentrations of the adsorbent constituents, i.e., 1.55% guar gum, 1.46% NC, and 0.84% borax for achieving the maximum swelling index (SI, 3741.42%) and higher adsorption capacity (q e , 24.05 mg g −1 ). 98.8% of dye q e was achieved at optimal conditions of pH 8 within 30 min at 30 °C. Adsorption isotherms and kinetics investigations showed good correlation with the Freundlich adsorption isotherm model (R 2 > 0.9889; ΔG°= −4.71; ΔH°= −12.30; ΔS°= −0.025) as well as the pseudo-second-order kinetics model, indicating multilayered and intricate adsorption mechanisms for dye removal. The study of thermodynamic parameters confirmed the exothermic nature of the adsorption process. The adsorption−desorption study of the resulting hydrogel exhibited 64.58% dye removal efficiency even after 4 consecutive cycles of reuse. Further, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction analysis revealed the surface morphology, functional moieties, thermal behavior, and crystallinity pattern of the hydrogel. Rheological analysis demonstrated pseudoplastic flow and improved mechanical behavior for the hydrogel. The current study found that the synthesized adsorbent with a higher SI and q e has a noticeable potential for the removal of dye pollutants from wastewater.

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Section: Effect Of Ph On Mb Adsorptionmentioning

confidence: 94%

Section: Effect Of Ph On Mb Adsorptionmentioning

confidence: 98%

“…This used hydrogel was reused for the next dye adsorption cycle per above-described procedure until it completely degraded. 19 2.4. Adsorption Study of MB Dye on Hydrogel.…”

Section: Biodegradabilitymentioning

confidence: 99%

Section: Effect Of Ph On Mb Adsorptionmentioning

confidence: 99%

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Nanocellulose-Based Ecofriendly Nanocomposite for Effective Wastewater Remediation: A Study on Its Process Optimization, Improved Swelling, Adsorption, and Thermal and Mechanical Behavior

Rana,

Anamika,

Sareen

et al. 2024

ACS Omega

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“…Recent researches on the removal of salicylhydroxamic acid and acid blue 92 by Nd 2 O 3 31 , 32 , rhodamine B by r-GO/rare earth metal oxide aerogels 33 , reactive black 5 using LaFeO 3 /chitosan nanocomposite 34 , arsenite by carrageenan-embedded LaFeO 3 nanocomposite 35 , and metal ions by ceria and its composites 36 have been undertaken. Additionally, grafted/cross-linked GG composites, Ag NPs containing GG/poly(AA) grafted polymer 37 , guar gum grafted acrylic acid/nanoclay 38 , mGG-PAAm 39 , GG/magnetite/chitosan 40 , pectin-crosslinked-GG/SPION 41 , GG-crosslinked-graphene oxide hydrogel 42 and GG-metal oxide (nano)composites, ZnO NPs/GG 43 , Fe 3 O 4 -GG 44 , and TiO 2 /GG hydrogel 45 have been arduously employed for the confiscation of many environmental pollutants. However, adsorption studies invoking guar gum cross-linked with PAAm (polyacrylamide) using N, N-methylenebisacrylamide as a cross-linker and erbium oxide as the filler has not been attempted so far to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Efficient liquid phase confiscation of nile blue using a novel hybrid nanocomposite synthesized from guar gum-polyacrylamide and erbium oxide

Hussain

Khan

et al. 2022

Sci Rep

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In recent times, biopolymer-metal oxide nanocomposites have gained prominent importance in the attenuation of environmental toxicants from aqueous phase. But lanthanide oxide-based biopolymer nanocomposites have scantly been evaluated for their adsorption potential. A novel guar gum-polyacrylamide/erbium oxide nanocomposite (GG-PAAm/Er2O3 NC) adsorbent was synthesized by copolymerization of guar gum (GG) and acrylamide (AAm) utilizing N-N′-methylenebisacrylamide as a crosslinker and Er2O3 as a reinforcing agent. The adsorptive efficacy of GG-PAAm/Er2O3 nanocomposite was evaluated using nile blue (NB) as a model pollutant dye from aquatic system. The prepared adsorbent was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) analysis, Brunauer–Emmett–Teller (BET) analysis, thermogravimetric analysis, scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM–EDX), and high-resolution transmission electron microscopy (HRTEM). The optimal process parameters, which include dosage (0.8 g/L), agitation time (40 min), initial solution pH (6), and initial NB concentration (80 mg/L) were determined by batch methodology. The equilibrium data for NB confiscation was better expressed by Langmuir isotherm model, with maximal adsorption effectiveness (Qm) of 225.88 mg NB/g demonstrating the actively monolayer adsorption onto homogeneous surface of GG-PAAm/Er2O3 NC. The kinetics of NB sorption process onto GG-PAAm/Er2O3 NC was reliable with pseudo-second order model. Thermodynamic parameters such as ΔH° (15–17 kJ/mol) and ΔS° (0.079–0.087 kJ/mol/K), and − ΔG° (8.81–10.55 kJ/mol) for NB validated the endothermic, an increased randomness at the GG-PAAm/Er2O3–NB interface, and spontaneity and feasibility of the process, respectively. The spent nanocomposite was effectively regenerated with NaOH, and could be reused proficiently for five runs demonstrating the high reusability potential of the nanocomposite. The commendable removal efficiency and high reusability of GG-PAAm/Er2O3 NC recommended it to be a highly competent adsorbent for cationic dyes particularly NB diminution from aqueous waste.

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Preparation and rheology of titanium dioxide nanoparticles loaded κ‐carrageenan hydrogel beads strengthened by mixed salts for multipollutant water remediation

Patel

Gangwar

Thareja

2023

Vinyl Additive Technology

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Hydrogel beads are emerging as alternate adsorbent material for the batch or continuous column treatment of dye wastewater. Polysaccharide-based gel beads are preferred for their uniform shape and size, large specific surface area, and easy separation by filtration and subsequent reuse. In this work, we prepare and rheologically characterize UV-active κ-carrageenan/TiO 2 beads for the adsorption and degradation of dyes. The 3-4 mm sized nanocomposite beads are formed by the extrusion of κ-carrageenan/TiO 2 gel solution in salt solutions. The maximum increase in modulus was observed with the addition of 1% w/v TiO 2 to κ-carrageenan and subsequent crosslinking with mixed salt of KCl and CaCl 2 . κ-carrageenan/TiO 2 beads crosslinked by mixed salt of KCl and CaCl 2 have higher adsorption capacity, as compared to beads crosslinked with single salt of KCl. The kinetic study indicated the chemisorption of Methylene Blue on the bead surface. κ-carrageenan/TiO 2 beads showed higher degradation for Methylene Blue and Nile Blue A than Rhodamine B in 5 and 50 ppm each multicomponent dye systems under UV irradiation. The κ-carrageenan/TiO 2 beads could form a porous column for the selective adsorption of positively charged dyes from a multicomponent dye system.

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TiO2/guar gum hydrogel composite for adsorption and photodegradation of methylene blue

Cited by 25 publications

References 67 publications

Nanocellulose-Based Ecofriendly Nanocomposite for Effective Wastewater Remediation: A Study on Its Process Optimization, Improved Swelling, Adsorption, and Thermal and Mechanical Behavior

Nanocellulose-Based Ecofriendly Nanocomposite for Effective Wastewater Remediation: A Study on Its Process Optimization, Improved Swelling, Adsorption, and Thermal and Mechanical Behavior

Efficient liquid phase confiscation of nile blue using a novel hybrid nanocomposite synthesized from guar gum-polyacrylamide and erbium oxide

Preparation and rheology of titanium dioxide nanoparticles loaded κ‐carrageenan hydrogel beads strengthened by mixed salts for multipollutant water remediation

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