Partition of antioxidants available in biowaste using a green aqueous biphasic system

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Maria Eugénia Macedo (Author) FEUP; Pedro Velho (Author) FEUP; Leonor Barroca (Author) FEUP

Journal

Title: Separation and Purification Technology

Vol. 307 No. 122707

ISSN: 1383-5866

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences

Associated Projects

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00X-M39

DOI: 10.1016/j.seppur.2022.122707

Abstract (EN): The most common feedstocks for natural antioxidants, i.e., chemicals which delay the oxidative damage by reactive oxidative species, are fruits and vegetables, but using food as raw material raises moral issues and contributes to several environmental and social problems, such as larger farming areas and global hunger. Therefore, the use of antioxidant-rich biowaste is a more feasible option for the production of dietary supple-ments, contributing simultaneously to a more circular economy and to more sustainable therapeutics. In this work, the partition of epicatechin and of vitamins B9, B12 and C was conducted, for the first time, in the green Aqueous Biphasic System (ABS) {ethyl lactate (1) + trisodium citrate (2) + water (3)} at 298.15 K and atmo-spheric pressure for future valorisation of common biowastes, such as fruit pomaces and vegetable peals. The largest partition coefficients (K) and extraction efficiencies (E) were obtained for vitamin B12 (K = 55.44, E = 98.5 %) and epicatechin (K = 5.44, E = 84.8 %) for the longest tie-line (TLL = 69.68 %), while, in the same conditions, vitamin B9 (K = 1.48, E = 61.6 %) and vitamin C (K = 0.44, E = 32.2 %) presented smaller affinity for the ethyl lactate-rich phase. These results were obtained with low biomolecule mass losses in quantification and after a careful study of the biomolecule stages present for each pH value.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15