Enhancing marine algae composites with cellulose nanofibrils for sustainable nutrient management

Author(s)

Petruz, Alessandra ; Faez, Roselena ; Souza, Claudinei Fonseca

• Document type: Journal article
• Source: Cellulose; v. 31, n. 9, p. 15-pg., 2024-05-17.

Abstract

Improper plastic waste management and excessive fertilizer use in agriculture have had significant environmental repercussions. Developing biodegradable enhanced efficiency fertilizers (EEFs) presents a promising approach to optimizing nutrient application and minimizing losses, promoting sustainable agricultural practices. This study focuses on producing carrageenan (KC) and alginate (ALG) based cast films, evaluating the effects of cellulose nanofibrils (CNFs) at different concentrations (0, 2, 3, 4, and 5 wt.%) and monoammonium phosphate (MAP) fertilizer (20 wt.%) on thermal, structural, morphological, and mechanical properties. The films were cast on Teflon-coated aluminum, polypropylene, and acrylonitrile-butadiene-styrene substrates, and their biodegradation, swelling, and release of PO43- ions in water were examined. Higher CNF concentrations altered composite morphology, aiding fertilizer dispersion and slowing release. Fertilizer inclusion influenced biodegradation, promoting microbiota growth and enhancing tensile strength. In conclusion, combining CNFs and fertilizer produced more robust films with reduced fertilizer release speed, demonstrating potential use for various applications, particularly in developing environmentally friendly biodegradable pots. (AU)

• FAPESP's process: 19/02535-5 - Polymeric structures as host matrices for-release nutrients: environmentally friendly fertilizers
• Grantee: Roselena Faez
• Support Opportunities: Regular Research Grants