Low cost and regenerable composites based on chitin/bentonite for the adsorption potential emerging pollutants

Perez, Jonás José; Villanueva, María Emilia; Sánchez, Laura M.; Ollier, Romina P.; Álvarez, Vera A.

doi:10.1016/j.clay.2020.105703

Cited by 46 publications

(16 citation statements)

References 49 publications

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“…This stage is the main difference between squid pen and isolated β-chitin thermograms. A third stage between 264 and 550 °C and maximum degradation at 294 °C is caused by the degradation, pyrolysis, vaporization, and elimination of the volatile products of remaining proteins and the chitin chain [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Utilization of Marine Waste to Obtain β-Chitin Nanofibers and Films from Giant Humboldt Squid Dosidicus gigas

et al. 2021

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β-chitin was isolated from marine waste, giant Humboldt squid Dosidicus gigas, and further converted to nanofibers by use of a collider machine under acidic conditions (pH 3). The FTIR, TGA, and NMR analysis confirmed the efficient extraction of β-chitin. The SEM, TEM, and XRD characterization results verified that β-chitin crystalline structure were maintained after mechanical treatment. The mean particle size of β-chitin nanofibers was in the range between 10 and 15 nm, according to the TEM analysis. In addition, the β-chitin nanofibers were converted into films by the simple solvent-casting and drying process at 60 °C. The obtained films had high lightness, which was evidenced by the CIELAB color test. Moreover, the films showed the medium swelling degree (250–290%) in aqueous solutions of different pH and good mechanical resistance in the range between 4 and 17 MPa, depending on film thickness. The results obtained in this work show that marine waste can be efficiently converted to biomaterial by use of mild extractive conditions and simple mechanical treatment, offering great potential for the future development of sustainable multifunctional materials for various industrial applications such as food packaging, agriculture, and/or wound dressing.

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Section: Resultsmentioning

confidence: 99%

Utilization of Marine Waste to Obtain β-Chitin Nanofibers and Films from Giant Humboldt Squid Dosidicus gigas

et al. 2021

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“…Even though the specific arsenic adsorption mechanism on clays is still under discussion, two main phenomena might be considered as the most probably intervening ones: the formation of strong superficial complexes with octahedrally-coordinated aluminum; and the sorption on positively charged Al and Fe hydroxides that are usually found as clay particles coatings (Ghorbanzadeh et al, 2015;Goldberg, 2002;Halter and Pfeifer, 2001;Mohapatra et al, 2007). Nevertheless, most of the authors agree that clays should be immobilized in a suitable polymer matrix to facilitate handling and possibly be reused easier (Perez et al, 2020;Sanchez et al, 2020).…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Bentonite-composite polyvinyl alcohol/alginate hydrogel beads: Preparation, characterization and their use as arsenic removal devices

Baigorria

Cano

Sánchez

et al. 2020

Environmental Nanotechnology, Monitoring & Management

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Composite hydrogel beads based on PVA, sodium alginate and bentonite were prepared by ionic gelation. The resulting beads were tested for arsenic removal from waste water.  Wet beads were highly porous and spherical. The incorporation of bentonite produced a reduction on the swelling degree and an increase of gel fraction of the beads. The clay inclusion plays a key role in the As removal.

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“…Therefore, it could be anticipated that the photocatalytic performance of Bi Due to the abundant, cheap, non-toxic and environmentally friendly features with an industrial name of montmorillonite, bentonite is a hydrophilic materialand often applied as a substrate to deposit the photocatalysts (Abbasi et al 2020, Zhang et al 2013b). The montmorillonite consists of 2:1 piled layer of two silicon oxide tetrahedrons with a sandwiched alumina octahedron between them (Perez et al 2020). The isomorphous substitution of Al 3+ by Si 4+ in the tetrahedral layer and Mg 2+ or Zn 2+ by Al 3+ inside the octahedral layer causes in the negative chargeon bentonite surface (Ma et al 2016b).…”

Section: Introductionmentioning

confidence: 99%

In-Situ Construction of Bi2O3/Bi2SiO5 Heterojunction Photocatalyst On The Exfoliated Bentonite With Efficient Photocatalytic Performance

Nie

Chen

Huang

et al. 2021

Preprint

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In this study, Bi2O3/Bi2SiO5 heterojunction were in-situ constructed on the exfoliated bentonite via a novel one-pot method. The crystal structure, morphology, and optical features for the as-synthesized Bi2O3/Bi2SiO5 heterojunctions were systematically characterized by a series of characterization methods. During the preparation process, the exfoliated bentonite acted as the Si source and framework for the in-situ formation of Bi2O3/Bi2SiO5 p-n heterogeneous junction on the bentonite interlayer. As a result, the Bi2O3/Bi2SiO5 photocatalyst exhibited a superior photocatalytic performance than that of bare α-Bi2O3 toward the decomposition of Rhodamine B (RhB) via the simulated solar light irradiation, which was due to the synergetic effects of large specific surface areas and p-n junction between Bi2SiO5 and Bi2O3. Moreover, a probable photocatalytic mechanism for the as-prepared photocatalysts was explored. This work provides a new insight into building the cost-efficient photocatalysts for the contaminant degradation and a latent photocatalytic application of bentonite.

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Low cost and regenerable composites based on chitin/bentonite for the adsorption potential emerging pollutants

Cited by 46 publications

References 49 publications

Utilization of Marine Waste to Obtain β-Chitin Nanofibers and Films from Giant Humboldt Squid Dosidicus gigas

Utilization of Marine Waste to Obtain β-Chitin Nanofibers and Films from Giant Humboldt Squid Dosidicus gigas

Bentonite-composite polyvinyl alcohol/alginate hydrogel beads: Preparation, characterization and their use as arsenic removal devices

In-Situ Construction of Bi2O3/Bi2SiO5 Heterojunction Photocatalyst On The Exfoliated Bentonite With Efficient Photocatalytic Performance

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