Lignin derived nano-biocarbon and its deposition on polyurethane foam for wastewater dye adsorption
| Autor: | Tizazu H. Mekonnen, Costas Tzoganakis, Boon Peng Chang, Curtis Seto |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Sonication Polyurethanes Nanoparticle 02 engineering and technology engineering.material Wastewater Biochemistry Lignin 03 medical and health sciences chemistry.chemical_compound Adsorption Coating Structural Biology Lignosulfonates Coloring Agents Molecular Biology 030304 developmental biology Polyurethane 0303 health sciences Carbonization Hydrogen Bonding General Medicine 021001 nanoscience & nanotechnology Carbon Dynamic Light Scattering Methylene Blue Freeze Drying chemistry Chemical engineering engineering Nanoparticles 0210 nano-technology |
| Zdroj: | International journal of biological macromolecules. 185 |
| ISSN: | 1879-0003 |
| Popis: | Historically, lignin has been produced as a waste by-product in industrial processes. In this study, lignosulfonate nanoparticles were fabricated and freeze-dried for use as a precursor material for carbonization. The use of the carbonized lignins for the adsorption of textile effluent as a value-added application is demonstrated. Characterization of the as received lignin (LN) and the developed nano-based freeze-dried lignin (NFLN) were performed prior to and after carbonization at 600, 750, 900 and 1050 °C. Using probe sonication, lignosulfonates were broken down into nanoparticles with lower weight-average molecular weight as verified by dynamic and static light scattering techniques. The difference between the LN and the NFLN was determined to be primarily morphological as the sonication and freeze-drying process imparted a platelet-like shape to the NFLN biocarbons and an increased surface area, while the remaining functionality was similar. The adsorption behaviour of methylene blue (MB), a synthetic cationic dye, was investigated using adsorption isotherm and kinetic models, with the NFLN exhibiting a maximum adsorption capacity of 109.77 mg/g. Overall, electrostatic attraction and hydrogen bonding contribute significantly to the MB adsorption. Further preliminary work was also performed demonstrating the coating of polyurethane foam for the adsorption of MB. These renewable biocarbons show promising properties for use as additive in adsorbent, coating, pigment or as a filler in polymer composite applications. |
| Databáze: | OpenAIRE |
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