Three-dimensional porous sodium alginate/gellan gum environmentally friendly aerogel: Preparation, characterization, adsorption, and kinetics studies

Dong, Kaiqiang; Kong, Xu; Wei, Ningsi; Fang, Yanyuan; Qin, Zhiyong

doi:10.1016/j.cherd.2022.01.027

Cited by 33 publications

(11 citation statements)

References 60 publications

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“…However, the gel formed solely through electrostatic action lacks plasticity. To enhance the plasticity of SA, a substrate comprising a 0.125 wt% calcium chloride solution is introduced to promote further gel formation 23 . The experiment evaluates the viscosity variation over time, water retention rate, and dust production rate of this composite gel.…”

Section: Resultsmentioning

confidence: 99%

“…To enhance the plasticity of SA, a substrate comprising a 0.125 wt% calcium chloride solution is introduced to promote further gel formation. 23 The experiment evaluates the viscosity variation over time, water retention rate, and dust production rate of this composite gel. The findings of the experiment are presented in Figure 3.…”

Section: Dust Suppression Effect Of Selfreactive Colloidal Dust Suppr...mentioning

confidence: 99%

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Study on the property of self‐reactive colloidal dust suppressant and the synergistic dust suppressant mechanism

Lu,

Liu,

et al. 2024

J of Applied Polymer Sci

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The poor plasticity of coal results in a large amount of dust during the mining process, thereby posing a significant impact on mine safety and the health of workers. In order to address this issue, a method has been proposed to suppress dust by enhancing the plasticity of coal through injecting a reactive material, which forms a colloid within the coal. The results implicated that the self‐active colloidal dust suppressant, composed of sodium alginate, gluconolactone, calcium disodium EDTA, and sodium dodecyl sulfate, effectively improved the moisture content of coal seams and decreased the brittleness of coal. Scanning electron microscopy and specific surface area test revealed that the dust suppressant not only tightly adheres to the surface of the coal after the reaction, but also penetrates the coal pores and forms a colloid on both the inner and outer surfaces of the coal. The material is rich in carboxyl and hydroxyl groups, which forms hydrogen bonds with the carboxyl and hydroxyl groups present in coal. This interaction enhances the toughness of coal. Simultaneously, it has the ability to adsorb water and function as a moisturizer. The combined synergistic effect of these mechanisms fundamentally reduces dust production during the coal mining process.

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Section: Resultsmentioning

confidence: 99%

Section: Dust Suppression Effect Of Selfreactive Colloidal Dust Suppr...mentioning

confidence: 99%

Study on the property of self‐reactive colloidal dust suppressant and the synergistic dust suppressant mechanism

Lu,

Liu,

et al. 2024

J of Applied Polymer Sci

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“…For the HANRs/SAB aerogel, it can be seen that the main peak information included the weak Ca 2s/2p and P 2s/2p peaks from HANRs and SAB, in which the O 1s peak was significantly enhanced (Figure b). By analyzing the fitting curves of the high-resolution O 1s spectrum of SAB and HANRs/SAB aerogel, the XPS O 1s of SAB shows four peaks located at 531.7, 533.4, 534.3, and 536.5 eV, which were, respectively, attributed to the electron binding energies of CO of the organic framework, C–OH/C–O, −CO–O, and O–H (Figure c). , When HANRs were compounded, the binding energy area of the HANRs/SAB aerogel at 531.7 eV was larger than that of SAB, which included the combination of the PO band of PO 4 3– in HANRs and the CO bond of SAB. In addition, the B 1s in the spectrum can be observed at 190.6 and 192.6 eV, which correspond to the −C–O–B and B–O bonds, respectively (see Figure d) .…”

Section: Resultsmentioning

confidence: 99%

“…Further exploration of the chemical and elemental state composition of the aerogel was carried out, as presented in Figure 4b− 4c). 18,51 When HANRs were compounded, the binding energy area of the HANRs/SAB aerogel at 531.7 eV was larger than that of SAB, which included the combination of the P�O band of PO 4 3− in HANRs and the C�O bond of SAB. In addition, the B 1s in the spectrum can be observed at 190.6 and 192.6 eV, which correspond to the −C−O−B and B−O bonds, respectively (see Figure 4d).…”

Section: Structure and Chemical Characterization Of Aerogelsmentioning

confidence: 99%

Thermal Insulation and Flame Retardancy of the Hydroxyapatite Nanorods/Sodium Alginate Composite Aerogel with a Double-Crosslinked Structure

Zhu

et al. 2022

ACS Appl. Mater. Interfaces

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As advanced thermal management materials, aerogels have great research value in the fields of engineering insulation, pipeline transportation, and packaging insulation. The composite interaction of the two-phase interface and the construction of a porous structure have an important impact on the thermal properties. Herein, a novel HANRs/SAB composite aerogel was prepared using sodium alginate (SA) with hydroxyapatite nanorods (HANRs), combined with boric acid crosslinking and freeze drying. In the prepared sample, the calcium ions in HANRs and SA formed the first layer of binding force and the chemical crosslinking of sodium alginate with boric acid formed the second layer of strong binding force, which effectively supported the skeleton of the aerogel and enhanced the overall mechanical properties. The modulus and maximum compressive strength of the obtained HANRs/SAB aerogel were 2.39 and 0.75 MPa, respectively, while the bulk density was 0.038–0.068 g·cm–3. Based on the prominent physical structure, the as-prepared HANRs/SAB aerogel exhibited good thermal insulation (∼35.15 mW·m–1·K–1) and outstanding flame retardant performance. Flame-retardant boric acid and high-thermal stability HANRs could effectively prevent heat transfer and organic combustion, thus resulting in an extremely low smoke gas release (11.3 m2 m–2). Therefore, the low-cost biopolymer composite aerogel based on a crosslinking strategy has broad application prospects in the field of thermal insulation and flame retardancy.

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“…Cai et al 13 reported gellan gum/graphene oxide aerogel for the adsorption of methylene blue with a maximum Q e of 192.14 mg/g. Dong et al 14 modified sodium alginate and gellan gum by freezedrying and ion cross-linking for use as an adsorbent to remove methylene blue with a recorded adsorption quantity of 1456.45 mg/g. Shabani and colleagues 15 investigated the sorption of Congo red by itaconic acid modified Cu−Ca−Al-layered doubled hydroxides/gum gellan nanocomposites with a maximum Q max value of 99.9 mg/g.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Gum Gellan-Based Hydrogel as a Novel Adsorbent for the Removal of Cationic Dyes: Linear Regression Models

Choudhary

Sharma²,

Sharma

et al. 2023

ACS Appl. Mater. Interfaces

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In this work, the suitability and efficacy of the previously reported biodegradable gellan gum (GG)-based hydrogel have been thoroughly investigated with respect to the adsorption mechanisms of malachite green (MG) and methylene blue (MB) dyes. The dyes' removal from aqueous solutions using GG-clpoly(AA) as an adsorbent material has been studied in a discontinuous system with respect to contact time, dose, pH, and temperature. The synthesized hydrogel was characterized by FT-IR, TGA, XRD, 1 H NMR, and FE-SEM. The adsorption capacity of GG-cl-poly(AA) hydrogel was investigated at different pH solutions (3, 7, and 10), and it was found that neutralized charge plays a crucial role in the enhancement of dye removal. To better understand the behavior of the GG-cl-poly(AA) hydrogel in adsorbing model dyes, adsorption kinetics, isotherms, and thermodynamics were also investigated. The values of qmax for MG and MB were obtained to be 552.48 and 531.9 mg g −1 . In addition, the influence of NaCl concentration on adsorption efficiency was investigated, and it was found that as the ion concentration increased, the effectiveness of the adsorption process dropped. Moreover, the synthesized hydrogel's potential application in the adsorption and separation of dyes from wastewater is enhanced by the reusability investigations conducted in convenient conditions. As a result, it is possible to conclude that reusing GG-cl-poly(AA) hydrogel as a low-cost, easy-to-handle, nontoxic material in an industrial wastewater treatment plant's adsorption process can provide a number of advantages, including high efficiency for MG and MB removal and cost savings on overall treatment plant operations.

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Three-dimensional porous sodium alginate/gellan gum environmentally friendly aerogel: Preparation, characterization, adsorption, and kinetics studies

Cited by 33 publications

References 60 publications

Study on the property of self‐reactive colloidal dust suppressant and the synergistic dust suppressant mechanism

Study on the property of self‐reactive colloidal dust suppressant and the synergistic dust suppressant mechanism

Thermal Insulation and Flame Retardancy of the Hydroxyapatite Nanorods/Sodium Alginate Composite Aerogel with a Double-Crosslinked Structure

Performance Evaluation of Gum Gellan-Based Hydrogel as a Novel Adsorbent for the Removal of Cationic Dyes: Linear Regression Models

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