Investigation of the influence of crosslinking activation methods on the physicochemical and Cu(II) adsorption characteristics of cellulose hydrogels

Santoso, Shella Permatasari; Angkawijaya, Artik Elisa; Bundjaja, Vania; Kurniawan, Ade; Yuliana, Maria; Hsieh, Chang‐Wei; Go, Alchris Woo; Cheng, Kuan‐Chen; Soetaredjo, Felycia Edi; Ismadji, Suryadi

doi:10.1016/j.jece.2021.106971

Cited by 13 publications

(4 citation statements)

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“…The Elovich model offered slightly lower R 2 values than the pseudo-second-order model. However, from the R E values (in the range of 0.17 to 0.2), it can be suggested that the adsorption of methylene blue towards rGO exhibited a mildly rising behavior [39]. This is consistent with the experimental data that moderate adsorption rate was observed until equilibrium after 400 min.…”

Section: Adsorption Kineticssupporting

confidence: 86%

“…The calculated R L values of rGO samples are in the range between 0 and 1 (Table 4). The results indicate that the adsorption of methylene blue onto rGO is favorable [39]. The lowest R L value exhibited by rGO 1:2 suggests that the adsorbent offers the most favorable sites for methylene blue molecules.…”

Section: Adsorption Isothermsmentioning

confidence: 89%

“…To date, many adsorption isotherm equations are available to represent the experimental data. The most common equations for liquid phase adsorption are the Langmuir and Freundlich isotherms [34,39]. The Langmuir adsorption model is presented as:…”

Section: Adsorption Isothermsmentioning

confidence: 99%

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Reduction of Graphene Oxide Using Citrus hystrix Peels Extract for Methylene Blue Adsorption

et al. 2022

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Kaffir lime peels extract was used as an agent for the reduction of graphene oxide (GO) into reduced graphene oxide (rGO) via a simple room temperature-dispersion process. The GO obtained from the Hummers process is dispersed in polyphenols rich extract at a varied GO-to-extract ratio of 1:1, 1:2, 1:3, and 1:4. The formation of rGO was confirmed through SEM, FTIR, XPS, XRD, and N2 sorption characterization. The restoration of C=C group and the reduction of several oxygen-containing groups confirmed the successful formation of rGO from GO. The resultant rGOs were used in the adsorption system for methylene blue uptake. The results indicated that the rGOs prepared at a GO-to-extract ratio of 1:2 had the highest adsorption capacity than rGO at other ratios. The XPS spectrum analysis of rGO 1:2 showed a higher C-C/C-O ratio than the other rGOs, indicating a higher number of adsorption sites which aid in improving the adsorption performance. The adsorption isotherm and kinetic studies were conducted to gain insight into the mechanism and rate of methylene blue uptake by the rGOs. The adsorption isotherm systems were consistent with Langmuir isotherm model with the highest adsorption capacity of 118 mg g–1 by rGO 1:2. The kinetic adsorption data are well represented by the pseudo-second order model, the adsorption equilibrium was achieved within 400 min with the overall uptake rate of 0.3 mg g–1 min–1.

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Section: Adsorption Kineticssupporting

confidence: 86%

Section: Adsorption Isothermsmentioning

confidence: 89%

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Reduction of Graphene Oxide Using Citrus hystrix Peels Extract for Methylene Blue Adsorption

et al. 2022

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“…Previous studies have explored the effectiveness of adsorbents based on Chinese herb residue in the removal of environmental pollutants [23][24][25][26][27]. Researchers have investigated the removal of copper and lead from water using chemically or biologically modified Chinese herb residue-based adsorbents [15].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Heavy Metals from Aqueous Solution Using Licorice Residue-Based Hydrogel Adsorbent

Yin

Zhu

et al. 2023

Gels

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The removal of heavy metals through adsorption represents a highly promising method. This study focuses on the utilization of an abundant cellulose-rich solid waste, licorice residue (LR), as a natural material for hydrogel synthesis. To this end, LR-EPI hydrogels, namely, LR-EPI-5, LR-EPI-6 and LR-EPI-8, were developed by crosslinking LR with epichlorohydrin (EPI), specifically targeting the removal of Pb, Cu, and Cr from aqueous solutions. Thorough characterizations employing Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy confirmed the successful crosslinking of LR-EPIs by EPI, resulting in the formation of porous and loosely structured hydrogels. Batch studies demonstrated the high efficacy of LR-EPI hydrogels in removing the three heavy metal ions from aqueous solutions. Notably, LR-EPI-8 exhibited the highest adsorption capacity, with maximum capacities of 591.8 mg/g, 458.3 mg/g, and 121.4 mg/g for Pb2+, Cr3+, and Cu2+, respectively. The adsorption processes for Pb2+ and Cu2+ were well described by pseudo-second-order kinetics and the Langmuir model. The adsorption mechanism of LR-EPI-8 onto heavy metal ions was found to involve a combination of ion-exchange and electrostatic interactions, as inferred from the results obtained through X-ray photoelectron spectroscopy and FTIR. This research establishes LR-EPI-8 as a promising adsorbent for the effective removal of heavy metal ions from aqueous solutions, offering an eco-friendly approach for heavy metal removal and providing an environmentally sustainable method for the reutilization of Chinese herb residues. It contributes to the goal of “from waste, treats waste” while also addressing the broader need for heavy metal remediation.

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Facile tuning of hydrogel properties for efficient water removal from biodiesel: An assessment of alkaline hydrolysis and drying techniques

Arthus,

Ramos Estevam,

Jova Aguila

et al. 2023

Chemical Engineering Science

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Investigation of the influence of crosslinking activation methods on the physicochemical and Cu(II) adsorption characteristics of cellulose hydrogels

Cited by 13 publications

References 84 publications

Reduction of Graphene Oxide Using Citrus hystrix Peels Extract for Methylene Blue Adsorption

Reduction of Graphene Oxide Using Citrus hystrix Peels Extract for Methylene Blue Adsorption

Efficient Removal of Heavy Metals from Aqueous Solution Using Licorice Residue-Based Hydrogel Adsorbent

Facile tuning of hydrogel properties for efficient water removal from biodiesel: An assessment of alkaline hydrolysis and drying techniques

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