Radiation influence on antioxidant capacity, bioactive compounds and extractability of coffee processing residues
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Brazilian Journal of Radiation Sciences
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During the agro-industrial process, the complete reuse of waste is an important
part of the process's sustainability. However, in most cases, these materials are
inadequately discarded, bringing environmental, economic, and social implications. In this
context, residue reuse represents an opportunity to develop by-products, in addition to
adding value to the raw material. However, conventional treatment processes end up
negatively altering the quantity and expressiveness of compounds and nutrients present
in this residue. Therefore, ionizing radiation has stood out as a promising technique
among the current resources available for residue reuse and microbial load reduction.
Thus, the objective of this work is to apply ionizing radiation to coffee processing
residues, such as husk and straw, with the aim of preserving and improving the
compounds and antioxidant activity. For this purpose, doses of 5 kGy were used on husk
and straw residue. The samples were subjected to extraction through physical and
chemical processes to obtain an extract from the residue. The extracts were analyzed to
identify total phenolic content (TPC), antioxidant activity (ABTS, FRAP, and ORAC),
extraction efficiency (EE), and cytotoxicity assays. An improvement in TPC of 26.0% for
husk and 19.5% for straw was observed. For antioxidant capacity, an improvement of
14.1%, 16.1%, and 33.3% for husk was observed in ABTS, FRAP, and ORAC analyses,
respectively. The 5 kGy dose provided an increase in compound extractability of 26.7%
(straw) and 191.9% (husk). In cytotoxicity tests, no significant differences were observed
between the irradiated residue and the control. However, an effect related to extract
concentration was observed. The irradiation process proved to be a promising technique
for agro-industrial residue management. This technique, in addition to promoting already
known microbiological benefits, also improved the quantity of compounds, antioxidant
activity, and compound extractability. Thus, the present proposal highlights the
application of nuclear energy as a viable solution and technological innovation for the
reuse of agro-industrial residue.
Como referenciar
BARROS, J.P.A.A.; RONDAN-FLORES, L.M.; NEGRAO, B.G.; SALIBA, A.S.M.C.; ALENCAR, S.M.; VIEIRA, D.P.; VILLAVICENCIO, A.L.C.H. Radiation influence on antioxidant capacity, bioactive compounds and extractability of coffee processing residues. Brazilian Journal of Radiation Sciences, v. 12, p. 12, 2025. 4A. DOI: 10.15392/2319-0612.2024.2692. Disponível em: https://repositorio.ipen.br/handle/123456789/49816. Acesso em: 29 Apr 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.