文献类型：期刊文献

英文题名：Extraction of betacyanins from Hylocereus polyrhizus (dragon fruit) peel and further enrichment by adsorption

作者：Ren, Na[1]; Wang, Conghui[1]; Zhao, Zhuo[1]; Cheng, Cailing[1]; Wei, Wei[1]; Qin, Guotong[2]

第一作者：Ren, Na

通讯作者：Wei, Wei

机构：[1] College of Biochemical Engineering, Beijing Union University, No. 18 Sanqu, Fatouxili, Chaoyang District, Beijing, 100023, China; [2] School of Space and Environment, Beihang University, 37 Xueyuan Road, Beijing, 100191, China

第一机构：北京联合大学生物化学工程学院

年份：2020

卷号：16

期号：12

外文期刊名：International Journal of Food Engineering

收录：EI(收录号：20204509455660);Scopus(收录号：2-s2.0-85094962178)

语种：英文

外文关键词：Extraction - Monolayers - Purification - Multiwalled carbon nanotubes (MWCN)

摘要：Mixtures of water and ethanol were tested for the extraction of betacyanins from Hylocereus polyrhizus peel to obtain natural colorants. In order to obtain betacyanins in a purified form, adsorption was carried out with two types of multi-walled carbon nanotubes (MWCNTs; pristine MWCNTs and carboxylated MWCNTs) and two macroporous resins (X-5 and AB-8). Carboxylated MWCNTs showed the highest adsorption capacity. On the basis of static adsorption test, carboxylated MWCNTs were selected for kinetic and isotherm studies. Langmuir and pseudo-first-order models could describe the process well. According to the Langmuir model, the maximum monolayer adsorption amount of carboxylated MWCNTs was 84.6 mg/g. After purification on a chromatographic column packed with carboxylated MWCNTs, the content of H. polyrhizus peel betacyanins in the pigment product was 4.62%. ? 2020 Walter de Gruyter GmbH, Berlin/Boston 2020.