Methanol/CaCl2 Wet Phase Inversion for Selective Separation of Heavy Metal Ions by Nylon 6-Mordenite Zeolite Composite Membranes

Nu, Phuong Thanh Ton; Kobayashi, Taishi

doi:10.1007/s41742-020-00291-0

Cited by 3 publications

(2 citation statements)

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“…Figure 1 described the fabrication of Al 2 O 3 -Nylon 6 composite (ANC) fibers using a wet-spinning method in a MeOH/CaCl 2 solution [38]. Firstly, a MeOH/CaCl 2 solution was prepared with 15 wt% of CaCl 2 dissolved in methanol.…”

Section: Fabrication Of Al 2 O 3 -Nylon 6 Composite Fibersmentioning

confidence: 99%

“…Nevertheless, there are no reports on the utilization of Nylon 6 in the production of composite fibers prepared with a wet-spinning method, primarily owing to the lower solubility associated with Nylon 6 in solvents. Interestingly, there are limited reports available regarding the fabrication of Nylon 6-based zeolite composite membranes designed especially for the selective adsorption of heavy metal ions [38] and ethylene gas [39] by dissolving Nylon 6 in MeOH/CaCl 2 . However, even though such a solvent in the wet-spinning process is applied to Nylon 6-fibers, there is high potential to find optimum conditions.…”

Section: Introductionmentioning

confidence: 99%

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Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al2O3-Nylon 6 Adsorbents

Phan,

Sato,

Kobayashi

2024

Fibers

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This study describes a novel approach using fibrous Al2O3-Nylon 6 composites to induce inhibition behavior in silica scaling systems. The composite fibers were fabricated with a wet-spinning process using the coagulation of a methanolic Nylon-CaCl2 solution with Al2O3 powder after immersing the thread-like solution in water. The mesoporous nylon fibers composed of Al2O3 powders ranging from 10 to 30 wt% loading demonstrated superior adsorption capabilities to silica in water, behaving with the Freundlich model and exhibiting effective multilayer adsorption onto the Al2O3 sites embedded in the fiber. Furthermore, the composite fibers inhibited silica scaling, even at high concentrations, due to a substantially efficient reduction in soluble silica when the composite fiber was present in the system. The utilization of 15 g of composite fibers resulted in a rapid drop to approximately 30 mg/L within the initial 10 h, which is a considerable improvement compared to the 300 mg/L observed in the fiber-free control sample. Notably, the presence of an elevated fiber content exceeding 7.5 g demonstrated the complete inhibition of silica precipitation. An analysis of the pore volume using nitrogen adsorption experiments before and after silica adsorption showed that silica adsorption resulted in a significant decrease in mesoporous properties at the alumina sites. This indicated an efficient adsorption of silica onto the alumina site, effectively removing silica from the system.

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Section: Fabrication Of Al 2 O 3 -Nylon 6 Composite Fibersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al2O3-Nylon 6 Adsorbents

Phan,

Sato,

Kobayashi

2024

Fibers

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Nanostructured faujasites with different structural and textural properties for adsorption of cobalt and nickel

Teixeira

Schmidt

Santos

et al. 2023

Braz. J. Chem. Eng.

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Pollutant Remediation Using Inorganic Polymer-Based Fibrous Composite Adsorbents

Le Thi,

Thu,

Kobayashi

2024

Advances in Chemical and Materials Engineering

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In the prospective of building sustainable development society, environmental remediation technology is important for reconstruction of polluted nature. This chapter highlights new remediation technology of fibrous adsorbents consist of inorganic-polymer composites having several merits on combining both properties of polymer and inorganic components. These materials possess a fibrous structural arrangement, providing them with a substantial surface area that facilitates efficient pollutant capture. Their characters address several topics of a wide range of environmental issues for removal of heavy metals, organic compounds, and gases, as customized to specific pollutant removal requirements. Becasue environmental concerns are increasingly issued, it is clear for decontamination process that fibrous adsorbents have great potential in reducing the negative effects of pollutants on both the environment and human health.

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Methanol/CaCl2 Wet Phase Inversion for Selective Separation of Heavy Metal Ions by Nylon 6-Mordenite Zeolite Composite Membranes

Cited by 3 publications

References 47 publications

Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al2O3-Nylon 6 Adsorbents

Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al2O3-Nylon 6 Adsorbents

Nanostructured faujasites with different structural and textural properties for adsorption of cobalt and nickel

Pollutant Remediation Using Inorganic Polymer-Based Fibrous Composite Adsorbents

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