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- W3147336107 abstract "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." @default.
- W3147336107 created "2021-04-13" @default.
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- W3147336107 date "2021-06-01" @default.
- W3147336107 modified "2023-10-15" @default.
- W3147336107 title "Entrapment of nano-ZnO into alginate/polyvinyl alcohol beads with different crosslinking ions for fertilizer applications" @default.
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- W3147336107 doi "https://doi.org/10.1016/j.ijbiomac.2021.03.138" @default.
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