中国食品学报2023，Vol.23Issue(12)：134-142,9.DOI:10.16429/j.1009-7848.2023.12.015
马家柚柚皮果胶的提取及其吸附Pb(Ⅱ)性能研究
Studies on Preparation of Pectin from Majiayou Pomelo Peel and Its Adsorption Properties on Pb(Ⅱ)
摘要
Abstract
This study aimed to extract pectin from local Majiayou pomelo(Citrus grandis(L.)Osbeck)peel in Jiangxi province with distilled water,hydrochloric acid and citric acid,respectively,and analyze the physicochemical components of pectin and its adsorption properties on Pb(Ⅱ),and explicit the effect of adsorption parameters(initial pH value,ini-tial ion concentration,adsorption time)on Pb(Ⅱ)and its adsorption mechanism by adsorption isotherms and adsorption kinetics.The results showed that the yield of pectin by citric acid extraction(CEP)was highest(28.62％),followed by hydrochloric acid extraction(HEP)and distilled water extraction(WEP).In addition,the esterification degree(58.20％)and molecular weight(598.40 ku)of CEP were significantly lower than those of WEP and HEP(P＜0.05),indicating that CEP had more carboxyl and higher solubility.The three pectins showed optimal adsorption of Pb(Ⅱ)at initial pH 5.0,and reached equilibrium after 120 min adsorption.In addition,the adsorption capacity of CEP on Pb(Ⅱ)was sig-nificantly higher than that by WEP and HEP.The adsorption isotherms of the three pectins were in accordance with Langmuir monolayer adsorption model,and the adsorption kinetics of the three pectins was consistent with pseudo first-order kinetics model.The adsorptions of three pectins on Pb(Ⅱ)were the result of physical and chemical adsorption.Conclusion:The physicochemical properties of pectin and its adsorption capacity on Pb(Ⅱ)were closely related to the extraction method,and CEP has a high adsorption capacity on Pb(Ⅱ),which could be used as a low-cost,efficient,natural and environmental friendly adsorbent for removal of Pb(Ⅱ).关键词
马家柚/柠檬酸法/柚皮果胶/Pb(Ⅱ)/吸附作用/动力学Key words
Citrus grandis(L.)Osbeck/citric acid extraction method/pomelo peel pectin/Pb(Ⅱ)/adsorption/dynamics引用本文复制引用
冯硕儒,曹雷鹏,高凯丽,李聪苗,刘玉环,阮榕生..马家柚柚皮果胶的提取及其吸附Pb(Ⅱ)性能研究[J].中国食品学报,2023,23(12):134-142,9.基金项目
重庆市自然科学基金项目(CSTB2022NSCQ-MSX1634,CSTB2022NSCQ-MSX0546) （CSTB2022NSCQ-MSX1634,CSTB2022NSCQ-MSX0546）
