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Biostimulants derived from organic urban wastes and biomasses: An innovative approach

Authors :
Alessia Giordana
Mery Malandrino
Alfonso Zambon
Gigliola Lusvardi
Lorenza Operti
Giuseppina Cerrato
Source :
Frontiers in Chemistry, Vol 11 (2023)
Publication Year :
2023
Publisher :
Frontiers Media S.A., 2023.

Abstract

We used humic and fulvic acids extracted from digestate to formulate nanohybrids with potential applications in agronomy. In order to obtain a synergic co-release of plant-beneficial agents, we functionalized with humic substances two inorganic matrixes: hydroxyapatite (Ca₁₀(PO₄)₆(OH)₂, HP) and silica (SiO₂) nanoparticles (NPs). The former is a potential controlled-release fertilizer of P, and the latter has a beneficial effect on soil and plants. SiO2 NPs are obtained from rice husks by a reproducible and fast procedure, but their ability to absorb humic substances is very limited. HP NPs coated with fulvic acid are instead a very promising candidate, based on desorption and dilution studies. The different dissolutions observed for HP NPs coated with fulvic and humic acids could be related to the different interaction mechanisms, as suggested by the FT-IR study.

Details

Language :
English
ISSN :
22962646
Volume :
11
Database :
Directory of Open Access Journals
Journal :
Frontiers in Chemistry
Publication Type :
Academic Journal
Accession number :
edsdoj.192c77d552345d09b9948d296190e1f
Document Type :
article
Full Text :
https://doi.org/10.3389/fchem.2023.969865