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Bio-based superabsorbent hydrogels for nutrient release

2024-04Journal article Embargoed access
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dc.contributor.authorRibeiro, Alessandra B.
dc.contributor.authorMoreira, Helena
dc.contributor.authorPereira, Sofia I. A.
dc.contributor.authorGodinho, Mariana
dc.contributor.authorSousa, Ana Sofia da Silva
dc.contributor.authorCastro, Paula
dc.contributor.authorPereira, Carla F.
dc.contributor.authorCasanova, Francisca
dc.contributor.authorFreixo, Ricardo
dc.contributor.authorPintado, Manuela E.
dc.contributor.authorRamos, Óscar L.
dc.date.accessioned2024-02-16T10:52:39Z
dc.date.embargo2026-02-01
dc.date.issued2024-04
dc.description.abstractDrought is characterized by a low water precipitation rate, with strong impact on crop productivity, threatening global food production. In this context, the use of soil amendments, such as superabsorbent hydrogels constitute a potential technology for better water use efficiency and higher crop yields. In this work, we synthesised cellulose-based hydrogels, characterized their physical and functional properties, evaluated their impact on the environment, and their potential to be used as a soil amendments. The hydrogel showed pH of 6.0 to 7.5 and conductivity below 10.0 µS cm-1. The Fourier-transform infrared spectroscopy (FTIR) showed a low intensity peak in the crystallinity region, which was supported by the low crystallinity index (27.3% ± 0.6) verified by Powder X-ray diffraction (PXRD) analysis. The swelling capacity reached more than 200 g of water, the hydrogel showed good resistance to osmotic pressure and high thermostability, which favours the application in hot and arid areas. In addition, no potentially hazardous compound was detected, nor was there any adverse effect on soil microorganisms. Further, the hydrogel was found to be safe for use during seed sowing and for promoting seedling development. In the greenhouse pot experiment, the hydrogels showed a significant increase in maize shoot and root biomass, demonstrating their ability to contribute to the overall water holding capacity of the soil, thereby influencing nutrient availability for more efficient plant growth. In conclusion, the superabsorbent hydrogel exhibited promising characteristics for use as a soil amendment, scalability potential and constitutes a sustainable alternative for agricultural applications.pt_PT
dc.description.versioninfo:eu-repo/semantics/acceptedVersionpt_PT
dc.identifier.doi10.1016/j.jece.2024.112031pt_PT
dc.identifier.eid85183944483
dc.identifier.issn2213-3437
dc.identifier.urihttp://hdl.handle.net/10400.14/43994
dc.identifier.wos001176204900001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectBio-based materialspt_PT
dc.subjectBiopolymerspt_PT
dc.subjectCrop production, soil amendmentpt_PT
dc.subjectDelivery systemspt_PT
dc.subjectDroughtpt_PT
dc.subjectNutrient releasept_PT
dc.titleBio-based superabsorbent hydrogels for nutrient releasept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue2pt_PT
oaire.citation.titleJournal of Environmental Chemical Engineeringpt_PT
oaire.citation.volume12pt_PT
rcaap.rightsembargoedAccesspt_PT
rcaap.typearticlept_PT

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