Entrapment of nano-ZnO into alginate/polyvinyl alcohol beads with different crosslinking ions for fertilizer applications
| Autor: | Jesper T.N. Knijnenburg, Kaewta Jetsrisuparb, Pornnapa Kasemsiri, Kamonit Amornrantanaworn, Prinya Chindaprasirt, Wimonporn Iamamornphan, Siraprapa Suwanree |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Absorption of water
Alginates chemistry.chemical_element Nanoparticle 02 engineering and technology Zinc Bead Biochemistry Polyvinyl alcohol 03 medical and health sciences chemistry.chemical_compound Structural Biology Spectroscopy Fourier Transform Infrared Particle Size Fertilizers Molecular Biology Dissolution 030304 developmental biology Ions 0303 health sciences integumentary system technology industry and agriculture General Medicine 021001 nanoscience & nanotechnology Biodegradable polymer Microspheres Kinetics Cross-Linking Reagents chemistry Chemical engineering Polyvinyl Alcohol visual_art Costs and Cost Analysis visual_art.visual_art_medium Nanoparticles Zinc Oxide 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | International Journal of Biological Macromolecules. 181:349-356 |
| ISSN: | 0141-8130 |
| DOI: | 10.1016/j.ijbiomac.2021.03.138 |
| Popis: | Zinc oxide nanoparticles (nano-ZnO) are attractive as fertilizer materials but high concentrations may negatively affect the environment. To reduce their dispersion in the environment we entrapped nano-ZnO in biodegradable polymer beads consisting of alginate and polyvinyl alcohol (PVA). The alginate/PVA/ZnO beads were prepared via ionotropic gelation using two different crosslinking ions (Ca2+ and Zn2+), and the effect of alginate crosslinking ion and PVA content on bead structure, water absorption, water retention and zinc release was investigated. The pure CaAlg and ZnAlg beads demonstrated a poor water absorption and retention, which were strongly enhanced by the incorporation of PVA into the beads. The continuous Zn release was measured in a sand column, and it was found that the Zn-crosslinked beads rapidly released high concentrations of Zn followed by a more gradual Zn release, whereas Ca alginates showed only a gradual Zn release. The Zn dissolution kinetics could be tuned by the crosslinking ion composition. The prepared nano-ZnO-containing alginate/PVA beads may be attractive for Zn fertilizer applications under water-limited conditions. |
| Databáze: | OpenAIRE |
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