Removal of methylene blue from aqueous solution by sorption on lignocellulose-g-poly(acrylic acid)/montmorillonite three-dimensional cross-linked polymeric network hydrogels

Yan, Shi; Xue, Zhixin; Wang, Ximing; Wang, Li; Wang, Aiqin

doi:10.1007/s00289-012-0898-4

Cited by 73 publications

(27 citation statements)

References 27 publications

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“…It was calculated that the maximum adsorption capacity of hydrogel towards MB is 434.8 mg g −1 , comparable with those of graphene oxide-chitosan hydrogels (390 mg g −1 ) [28] and graphene oxide sponge (387 mg g −1 ) [29] , and much larger than those of chitosan beads (99 mg g −1 ) [30] , C 2 -symmetric benzene-based hydrogels (53.38 mg g −1 ) [31] and swede rape straw (246.4 mg g −1 ) [32] . Although most of polymer adsorbents, such as sodium humate/polyacrylamide/clay hybrid hydrogels (800 mg g −1 ) [33] , lignocellulose- g -poly(acrylic acid)/montmorillonite hydrogels (1994.38 mg g −1 ) [34] and poly(2-acrylamido-2-methylpropane sulfonic acid-co-itaconic acid) hydrogels (1000 mg g −1 ) [35] , exhibit quite high adsorption capacities, they can not be regenerated and do not satisfy environmental requirements. Designing and synthesizing new types of hydrogel with efficient adsorption and regenerative properties is an essential subject in the removal of dyes from wastewater.…”

Section: Resultsmentioning

confidence: 99%

“…As a continuous work, herein clay nanocomposite hydrogels were further functionalized and applied for adsorption of organic dyes such as methylene blue (MB), and heavy metal ions, the removal of which has drawn increasing attention in recent years due to their long-term environmental toxicity and short-term public health damage. Here, a self-standing membrane, produced from tough and elastic hydrogel, was used for the adsorption study, instead of shapes from other groups, where fragile hydrogel particles or dried gel powders are commonly employed [13] – [15] . 2-acrylamide-2-methylpropanesulfonic acid sodium salt (AMPSNa) was chosen as a modifier and added into the hydrogel network to improve adsorption efficiency, since –SO 3 H groups in the AMPSNa have a high affinity towards dye molecules and heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Functional Elastic Hydrogel as Recyclable Membrane for the Adsorption and Degradation of Methylene Blue

Bao

2014

PLoS ONE

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Developing the application of high-strength hydrogels has gained much attention in the fields of medical, pharmacy, and pollutant removal due to their versatility and stimulus-responsive properties. In this presentation, a high-strength freestanding elastic hydrogel membrane was constructed by clay nanosheets, N, N-dimethylacrylamide and 2-acrylamide-2-methylpropanesulfonic acid for adsorption of methylene blue and heavy metal ions. The maximum values of elongation and Young’s modulus for 0.5% AMPSNa hydrogel were 1901% and 949.4 kPa, respectively, much higher than those of traditional hydrogels. The adsorptions were confirmed to follow pseudo-second kinetic equation and Langmuir isotherm model fits the data well. The maximum adsorption capacity of hydrogel towards methylene blue was 434.8 mg g−1. The hydrogel also exhibited higher separation selectivity to Pb2+ than Cu2+. The methylene blue adsorbed onto the hydrogel membrane can be photocatalytically degraded by Fenton agent and the hydrogel membrane could be recycled at least five times without obvious loss in mechanical properties. In conclusion, this presentation demonstrates a convenient strategy to prepare tough and elastic clay nanocomposite hydrogel, which can not only be applied as recyclable membrane for the photocatalytic degradation of organic dye, but also for the recovery of valuables.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functional Elastic Hydrogel as Recyclable Membrane for the Adsorption and Degradation of Methylene Blue

Bao

2014

PLoS ONE

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“…To interpret the adsorption system nature, several kinetic models were used to construe the experimental data that accessed from adsorption experiments. Kinetic isotherms were analysed according to Pseudo-firstand second-order kinetic models [43]. The equation of Pseudo-first-order is formulated as follows [44]:…”

Section: 2e Kinetic Studiesmentioning

confidence: 99%

Assessment of cellulose acetate/manganese oxide thin film as adsorbent for selective extraction of flavone

et al. 2018

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The present study depicts the efficiency of cellulose acetate/manganese oxide thin films as adsorbents for selective extraction and detection of flavone in environmental waters. The selectivity of thin films (CA/Mn-1 and CA/Mn-2) was evaluated towards several organic compounds. Based on selectivity study results, CA/Mn-2 thin film was the most selective towards flavone among other compounds. In addition, the effect of other parameters such as contact time and initial concentration of flavone was investigated to optimize adsorption conditions. The adsorption capacity of flavone was experimentally obtained as 57.96 mg g −1 and theoretically calculated from Langmuir equation as 58.48 mg g −1 , which indicates the high agreement of the results. Moreover, data obtained from kinetic study suggested that the adsorption of flavone onto CA/Mn-1 phase followed a pseudo-second-order kinetic model. Finally, validation of this method has attained reasonable results for determination of flavone in real water samples.

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“…Besides increasing the number of hydrophilic groups, increasing adsorption sites of hydrogel is also helpful to enhance the adsorption property. Incorporating clay into hydrogel to prepare composite hydrogel is an efficient method to increase the adsorption sites [12][13][14][15]. Montmorillonite [6,16], laponite [17], vermiculite [14], sepiolite [15], and attapulgite [18] have been used to prepare composites hydrogels.…”

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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Removal of methylene blue from aqueous solution by sorption on lignocellulose-g-poly(acrylic acid)/montmorillonite three-dimensional cross-linked polymeric network hydrogels

Cited by 73 publications

References 27 publications

Functional Elastic Hydrogel as Recyclable Membrane for the Adsorption and Degradation of Methylene Blue

Functional Elastic Hydrogel as Recyclable Membrane for the Adsorption and Degradation of Methylene Blue

Assessment of cellulose acetate/manganese oxide thin film as adsorbent for selective extraction of flavone

Alginate Composite Hydrogel Bead with Multilayer Flake Structure for Dye Adsorptions

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