resumo
Nowadays, one of the biggest challenges for society is the development of appropriate technologies to process the waste residue produced worldwide. In the food sector, the generated waste is estimated to be nearly billions of tons annually. Brazil is one of the most representative examples of the economic and industrial potential of underexplored residues and raw materials. The palm heart, scientifically known as Bactris gasipaes, mainly its fruits, is one of the many examples found in Brazilian flora. The fruits have significant amounts of carotenoids, namely, the all-trans-beta-carotene, all-trans-lycopene and the rare all-trans-gamma-carotene, which are considered as excellent raw materials of commercial interest. However, the main challenge that remains is their efficient recovery. This work proposes the development of a performant process of extraction mediated by the use of ionic liquid (IL)-based ethanolic solutions. Four ILs were examined, as well as the solid-liquid ratio R(S/L), number of extractions, the time of extraction, the co-solvent-ratio R(IL/E) and the homogenization method employed. After selecting the best solvent ([C(4)mim][BF4]) and process conditions (extraction yield of 172 +/- 18 mu g(carotenoids) g(dried biomass)(-1)), the IL-ethanolic solution recyclability was tested by freezing/precipitating the IL (maximum of 94% of IL recovered), proving its success for at least 10 cycles while decreasing the process carbon footprint by 50% compared with the conventional method using acetone.
palavras-chave
ULTRASONIC-ASSISTED EXTRACTION; THERMAL-DEGRADATION KINETICS; ANTIOXIDANT ACTIVITY; SEPARATION; MODEL
categoria
Chemistry; Science & Technology - Other Topics
autores
Mesquita, LMD; Ventura, SPM; Braga, ARC; Pisani, LP; Dias, ACRV; de Rosso, VV
nossos autores
Sónia Patrícia Marques Ventura
Professor AuxiliarProjectos
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2019)
Projeto de Investigação Exploratória: Sónia Patricia Marques Ventura (IF/00402/2015)
agradecimentos
This work was supported by Fundacao de Amparo a Pesquisa do Estado de Sao Paulo - FAPESP through the project (2016/18910-1) and fellowship (2016/23242-8).; This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, FCT Ref. UID/CTM/50011/2019, financed by national funds through the FCT/MCTES. The authors are grateful for the national fund through the Portuguese Foundation for Science and Technology (FCT) for the contracts IF/00402/2015 and IF/00587/2013 of S. P. M. Ventura and A. C. R. V. Dias, respectively.; A. C. R. V. Dias acknowledges FCT/MCTES for the financial support to CESAM (UID/AMB/50017 - POCI-01-0145-FEDER-007638), through national funds (PIDDAC), and the co-funding by FEDER, within the PT2020 Partnership Agreement and Compete 2020.