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Deposition of Porous Sorbents on Fabric Supports
Published on: June 12, 2018
A useful organofunctionalized layered silicate for textile dye removal
Betina Royer1, Natali F Cardoso, Eder C Lima
1Institute of Chemistry, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil.
Journal of Hazardous Materials
|June 18, 2010
Summary
Researchers modified the octosilicate Na-RUB-18 to create nanostructured hybrids. This new material effectively removes the textile dye Reactive Black 5 from aqueous solutions.
Area of Science:
- Materials Science
- Nanotechnology
- Environmental Chemistry
Background:
- Octosilicate Na-RUB-18 possesses ion-exchange capabilities.
- Chemical modification can yield inorganic-organic nanostructured hybrids.
Purpose of the Study:
- To synthesize organofunctionalized nanostructured layered materials.
- To evaluate the material's efficiency in removing textile dyes from aqueous solutions.
Main Methods:
- Ion exchange with cetyltrimethylammonium cations.
- Heterogeneous attachment of 3-trimethoxysilylpropylurea.
- Characterization using XRD, NMR, FTIR, TGA, and SEM.
- Dye adsorption studies under varying conditions (time, dosage, pH).
Main Results:
- Successful synthesis of organofunctionalized Na-RUB-18 with a basal distance of 2.43 nm.
- Immobilization of 2.03 mmol g(-1) of silylating agent.
- Covalent bond formation confirmed by solid-state NMR.
- Efficient removal of Reactive Black 5 dye achieved.
- Adsorption equilibrium reached within 150 min at pH 3.0 and 298 K.
- Adsorption kinetics best fitted by fractional-order models and equilibrium by Sips isotherm.
Conclusions:
- The synthesized nanostructured material is effective for textile dye removal.
- The material's properties are suitable for environmental remediation applications.
- Understanding adsorption kinetics and isotherms is crucial for process optimization.
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