Macedo Antónia, Gomes Tânia, Ribeiro Carlos, Moldão-Martins Margarida, Duarte Elizabeth, Alves Vítor D
Escola Superior Agrária, Polytechnic Institute of Beja, Rua Pedro Soares, Ap. 6158, 7801-908 Beja, Portugal.
LEAF-Linking Landscape, Environment, Agriculture and Food, Associated Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, 1349-017 Lisboa, Portugal.
Foods. 2022 Aug 25;11(17):2581. doi: 10.3390/foods11172581.
Mango peel is rich in nutritional and functional compounds, such as carbohydrates, dietary fibers, proteins, and phenolic compounds, with high potential to be applied in the food industry. Most of the investigation about recovery of bioactive compounds from fruit bioproducts involves extraction techniques and further separation of target compounds. There is still a lack of information about the potential of membrane processes to recover the nutritive/functional compounds present in aqueous extracts of those bioproducts. This research is addressed to study the performance of ultrafiltration (UF), followed by nanofiltration (NF) of UF permeates, to fractionate the compounds present in aqueous extracts of mango peel. Both UF and NF concentration processes were carried up to a volume concentration factor of 2.0. Membranes with molecular weight cut-offs of 25 kDa and 130 Da were used in the UF and NF steps, respectively. UF and NF concentrates showed antioxidant activity, attributed to the presence of phenolic compounds, with rejections of about 75% and 98.8%, respectively. UF membranes totally rejected the higher molecular weight compounds, and NF membranes almost totally concentrated the fermentable monosaccharides and disaccharides. Therefore, it is envisaged that NF concentrates can be utilized by the food industry or for bioenergy production.
芒果皮富含营养和功能性化合物，如碳水化合物、膳食纤维、蛋白质和酚类化合物，在食品工业中具有很高的应用潜力。大多数关于从水果生物制品中回收生物活性化合物的研究都涉及提取技术和目标化合物的进一步分离。关于膜分离过程回收这些生物制品水提取物中营养/功能化合物潜力的信息仍然匮乏。本研究旨在研究超滤（UF）的性能，随后对超滤渗透物进行纳滤（NF），以分离芒果皮水提取物中的化合物。UF和NF浓缩过程均进行至体积浓缩因子为2.0。UF和NF步骤分别使用截留分子量为25 kDa和130 Da的膜。UF和NF浓缩物表现出抗氧化活性，这归因于酚类化合物的存在，截留率分别约为75%和98.8%。UF膜完全截留了高分子量化合物，NF膜几乎完全浓缩了可发酵的单糖和二糖。因此，可以设想NF浓缩物可被食品工业利用或用于生物能源生产。
