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Cocoa Bean Shell Wastes for the Green Synthesis of Silver Nanoparticles with Antimicrobial Activity Against Foodborne Pathogens

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Abstract

The green synthesis of silver nanoparticles offers a non-toxic, eco-friendly, economical, and efficient solution against various microorganisms. The study aimed to investigate the utilization of cocoa bean shells for the production of silver nanoparticles through green synthesis, besides its characterization and evaluation against foodborne pathogens. To this end, total phenolic compounds, individual bioactive compounds, and antioxidant activity were evaluated in the aqueous extract of the cocoa bean shell. In addition, the size and stability of the silver nanoparticles were investigated (zeta potential and dynamic light scattering), morphology (scanning electron microscopy), chemical composition (mid-infrared spectroscopy), and their effectiveness against Escherichia coli (ATCC 25922), Listeria monocytogenes (ATCC 19117), Staphylococcus aureus (ATCC 22923), Salmonella enteritidis (S64), Cronobacter sakazakii (ATCC 29004), and Klebsiella pneumoniae (ATCC 18883). The extract was rich in reducing agents and efficiently produced AgNPs with high surface area (74.51 ± 0.38 nm) and stability (− 17.97 ± 0.12 mV). The nanoparticles were also found to be effective against all tested pathogens, demonstrating the potential of agro-industrial waste to produce AgNPs for various industrial applications.

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Data will be made available on request.

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Funding

This study was financially supported by the National Council for Scientific and Technological Development (CNPq, Brazil) (308300/2021–1).

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Contributions

Ingrid Alves Santos: Formal analysis, Conceptualization, Methodology, Writing – original draft and preparation. Hanna Elisia Araújo de Barros: Conceptualization and investigation. Danilo José Machado de Abreu: Conceptualization and investigation. Igor Carvalho Fontes Sampaio: Writing – review and editing. Elano Pinheiro Pereira: Conceptualization and investigation. Cristiane dos Reis Feliciano: Data curation, Investigation. Mariane Gonçalves Santos: Methodology, Review and editing. Juliano Elvis de Oliveira: Methodology and Supervision. Roberta Hilsdorf Piccoli: Methodology and Supervision. Muhammad Irfan: Software, Writing, Review and editing. Eduardo Valério de Barros Vilas Boas: Methodology, Funding acquisition, Conceptualization and Supervision. Marcelo Franco: Conceptualization, Review and editing, Funding acquisition, Project administration, Supervision.

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Correspondence to Marcelo Franco.

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Santos, I.A., de Barros, H.E.A., de Abreu, D.J.M. et al. Cocoa Bean Shell Wastes for the Green Synthesis of Silver Nanoparticles with Antimicrobial Activity Against Foodborne Pathogens. Food Bioprocess Technol (2023). https://doi.org/10.1007/s11947-023-03299-4

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  • DOI: https://doi.org/10.1007/s11947-023-03299-4

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