Physicochemical properties and Pb2+adsorption capacity of freeze-dried hawthorn pectin fractions by gradient ethanol precipitation

被引：10
作者：
Li, Zhixin [1 ]
Zhang, Xiaoyan [1 ,2 ]
Zhu, Chuanhe [1 ,2 ]
机构：
[1] Shandong Agr Univ, Coll Food Sci & Engn, Key Lab Food Proc Technol & Qual Control Shandong, Tai An 271000, Peoples R China
[2] Shandong Agr Univ, Coll Food Sci & Engn, 61 Daizong Rd, Tai An 271018, Shandong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2023年 / 245卷
关键词：
Hawthorn pectin; Gradient ethanol precipitation; Adsorption; Pb2+; CITRUS PECTIN; RHEOLOGICAL PROPERTIES; BINDING CAPACITY; METAL-IONS; ADSORPTION; POLYSACCHARIDES; WATER; REMOVAL; METHYLESTERIFICATION; POLYETHYLENEIMINE;
D O I：
10.1016/j.ijbiomac.2023.125581
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Three fractions of FHP20, FHP40 and FHP60 were obtained from freeze-dried hawthorn pectin by gradient ethanol precipitation (20-60 %), and their physicochemical properties and adsorption performance on Pb2+ were investigated. It was found that the content of galacturonic acid (GalA) and esterification of FHP fractions gradually reduced with the increase of ethanol concentration. FHP60 had the lowest molecular weight (60.69 x 103 Da), and the composition and proportion of monosaccharides were significantly different. The experimental results of Pb2+ adsorption showed that the adsorption process fitted well with the Langmuir monolayer adsorption and the pseudo-second-order models. Our findings suggested that pectin fractions with good homogeneity of molecular weight and chemical construction can be obtained by gradient ethanol precipitation, and hawthorn pectin could be developed as a potential adsorbent for Pb2+ removal.
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页数：12
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