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, W[1]

机构：[1]Beijing Union Univ, Coll Biochem Engn, 18 Sanqu, Beijing 100023, Peoples R China;[2]Beihang Univ, Sch Space & Environm, 37 Xueyuan Rd, Beijing 100191, Peoples R China

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Biochem Engn, 18 Sanqu, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2020

卷号：16

期号：12

外文期刊名：INTERNATIONAL JOURNAL OF FOOD ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000599840300002)】；

基金：This study was supported by National Science Foundation of China (Project 51772031).

语种：英文

外文关键词：adsorption mechanism; betacyanins; carbon nanotubes; enrichment; Hylocereus polyrhizus peel

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 pseudofirst-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%.