A Lignin-containing Hemicellulose-based Hydrogel and its Adsorption Behavior

Song, Xiyi; Chen, Fangeng; Liu, Shangjun

doi:10.15376/biores.11.3.6378-6392

Cited by 31 publications

(15 citation statements)

References 21 publications

(24 reference statements)

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“…During the recent years the potential of bio-renewable polymers to be included in hydrogels for MB removal from waste waters has been evaluated in several works. [27,[58][59][60]. When the MB uptake studies were done in similar conditions to the PMVE/MA-lignin hydrogels the absorption capacities were similar (800-1000 mg/g)…”

Section: Accepted Manuscriptmentioning

confidence: 86%

Lignin-based hydrogels with “super-swelling” capacities for dye removal

Domínguez-Robles

Peresin

Tamminen

et al. 2018

International Journal of Biological Macromolecules

106

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Lignin is a complex natural polymer and it is one of the main constituent of the lignocellulosic biomass. Moreover, it is a bio-renewable material and it is available in large amounts as by-product from the forest industry. Lignin-based hydrogels with high swelling capabilities were prepared by crosslinking poly (methyl vinyl ether co-maleic acid) and different technical lignins in ammonium and sodium hydroxide solutions. The produced hydrogels showed a wide range of water absorption capacities varying from 13 to 130 g of water per 1 g of sample. It was observed that the higher the water uptake the poorer mechanical performance, as evaluated in terms of storage and loss modulus (G' and G″, respectively) of the materials. Methylene blue (MB) was used as a model dye to evaluate the adsorption and release capabilities of the lignin hydrogels. Results suggested that these hydrogels showed a high MB removal efficiency, which ranged from 12 to 96%. On the contrary, the percentages of MB released depended on the negative surface charge of the hydrogels, showing values which ranged from 0.06 to 0.35%. Thus, these materials have potential to be used as adsorbents for the removal of organic dyes from waste water.

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Section: Accepted Manuscriptmentioning

confidence: 86%

Lignin-based hydrogels with “super-swelling” capacities for dye removal

Domínguez-Robles

Peresin

Tamminen

et al. 2018

International Journal of Biological Macromolecules

106

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“…Notably, our eutectogel yields a faster removal of MV, compared with a graphene oxide composite gel, and can be used more times (entries 1 and 7). Finally, our best eutectogel displays a lower efficiency for MB removal compared with a hemicellulose‐based hydrogel, although, once again, in our case the gel could be reused for a higher number of cycles (entries 3–6).…”

Section: Resultsmentioning

confidence: 73%

“…[34] This highlights the good potential of our gels for application in the treatment of wastewater. Hemicellulose-based hydrogel [27] MB 8 80 4…”

Section: Dye Removal By Adsorptionmentioning

confidence: 99%

Environmentally Friendly Eutectogels Comprising l‐amino Acids and Deep Eutectic Solvents: Efficient Materials for Wastewater Treatment

et al. 2020

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Current concerns for sustainability and the environment make low‐impact materials desirable for environmental remediation and, in particular wastewater treatment. We obtained supramolecular gels of l‐amino acids in the deep eutectic solvent formed by choline chloride and phenylacetic acid. After gel characterization, and investigating gel–sol transition temperatures, gelation kinetics, rheological properties, and morphology, the gels were applied as sorbents to remove cationic dyes from aqueous solutions. The effects of the pH, dye nature, volume, and concentration of wastewater were analyzed, and the best result was obtained with a l‐phenylalanine‐based eutectogel. It can be reused for at least 9 times without losing efficiency, also with dye mixtures. Interestingly, this gel can be loaded onto columns to decolorize flowing solutions, achieving 85 % of removal efficiency in only 10 minutes and allowing its reuse for at least 4 cycles. In terms of adsorption capacity, this eutectogel is competitive with efficient gel‐based dye sorbent systems, with a value 1930 mg/g reached at a high concentration of rhodamine B 479 mg/L.

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“…Increasing the number of hydrophilic groups in hydrogel is beneficial for swelling. Grafting polymerization can introduce extra chains with hydrophilic groups such as polyacrylic acid, polyamide to increase the swelling degree and further increase the adsorption capacity [9][10][11]. According to the reports, acrylic acid has been grafted polymerization onto alginate to prepared hydrogel.…”

Section: Introductionmentioning

confidence: 99%

Alginate Composite Hydrogel Bead with Multilayer Flake Structure for Dye Adsorptions

Chen¹,

Zhu²

2019

Journal of Renewable Materials

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With the rapid development of textile industry, a large amount of dyecontaminated effluents was produced and caused serious environmental problem. To remove the dye from effluents, adsorption materials have been applied because of their relatively cheap, high efficiency, and easy handling. In this study, a novel composite hydrogel bead with unique multilayer flake structure was fabricated by alginate, acrylamide and attapulgite for dye adsorption. Acrylamide was grafted polymerization onto alginate to obtain alginate-g-poly(acrylamide). Then alginate-gpoly(acrylamide) was cross-linked by Ca 2+ ions in present of attapulgite to form composite hydrogel bead. Scanning electron microscopy (SEM) results show that the freeze dried composite hydrogel bead has multilayer flake structure incorporating attapulgite. Fourier transform infrared spectroscopy (FTIR) and Thermo-gravimetric analysis (TGA) results indicate that acrylamide has been successfully grafted polymerization on sodium alginate. Grafting polymerization of acrylamide onto sodium alginate obviously enhances the swelling of hydrogel bead. Incorporating of attapulgite into hydrogel bead effectively enhances the adsorption capacity to methylene blue and the maximum adsorption capacity is 155.7 mg g-1. Multilayer flake structure increases the adsorption area for methylene blue, but hinders the diffusion of methylene blue into the inner of composite hydrogel bead. High pH solution is beneficial to the adsorption. Pseudo-second order model and Fraundlinch model best describe the adsorption kinetic and isotherm, respectively. These results indicate that composite hydrogel bead is a promising adsorption material for dye-contaminated water treatment.

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A Lignin-containing Hemicellulose-based Hydrogel and its Adsorption Behavior

Cited by 31 publications

References 21 publications

Lignin-based hydrogels with “super-swelling” capacities for dye removal

Lignin-based hydrogels with “super-swelling” capacities for dye removal

Environmentally Friendly Eutectogels Comprising l‐amino Acids and Deep Eutectic Solvents: Efficient Materials for Wastewater Treatment

Alginate Composite Hydrogel Bead with Multilayer Flake Structure for Dye Adsorptions

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