来安花红果渣纤维制备及其Pb(Ⅱ)吸附特性  

Preparation and Pb(Ⅱ)Adsorption Characteristics of the Fibers from Laian Malus asiatica Fruit Pomace

作　　者：张汆 陈志宏 刘洋 ZHANG Cuan;CHEN Zhihong;LIU Yang(School of Biological Science and Food Engineering,Chuzhou University,Chuzhou 239000,China)

机构地区：[1]滁州学院生物与食品工程学院,安徽滁州239000

出　　处：《现代食品科技》2024年第10期293-301,共9页Modern Food Science and Technology

基　　金：滁州市来安县省级农业科技园区科技计划项目(2022)。

摘　　要：为探讨花红果渣纤维的理化功能性质,文中分别采用水、1.25 g/100 mL盐酸和1.25 g/100 mL氢氧化钠溶液从中分别提取得到WF、AF和AKF等3种纤维样品。在对原料及纤维样品主要理化功能性质分析基础上,对其Pb(Ⅱ)吸附性质和机理进行了分析比较。结果显示,来安花红原果渣中含有27.64 g/100 g的粗纤维,所得WF、AF和AKF中粗纤维含量分别为48.60、54.14和64.72 g/100 g。Pb(Ⅱ)吸附实验结果显示,三种果渣纤维具有相似的吸附性质,在1~4μg/mL范围内,随Pb(Ⅱ)初始质量浓度增加,平衡吸附量和吸附速率均显著增加(P≤0.05)。初始质量浓度为4μg/mL时,AKF平衡吸附量和吸附速率最高,分别为394.86μg/g和33.18μg/min,其次是AF,WF最低。吸附动力学和热力学研究结果显示,三种果渣纤维对Pb(Ⅱ)的吸附过程更符合准二级动力学模型,吸附方式以化学吸附为主,吸附过程为放热反应,适当低温有利吸附进行。结果表明,花红果渣纤维具有良好的吸水、吸油特性,对水溶液中Pb(Ⅱ)具有较强的吸附能力,在功能性食品添加剂和水处理领域有很好的应用前景。In order to explore the physicochemical and functional properties of three kinds of fiber samples,namely WF,AF and AKF,were extracted from Malus asiatica fruit pomace using water,1.25 g/100 mL hydrochloric acid and 1.25 g/100 mL sodium hydroxide solution.Based on the analysis of the main physicochemical and functional properties of original fruit pomace and derived fiber samples,their Pb(Ⅱ)adsorption properties and mechanism were analyzed and compared.The result shows that the fruit pomace of Malus asiatica contained 27.64 g/100 g crude fiber,and the crude fiber contents in the WF,AF and AKF samples were 48.60,54.14 and 64.72 g/100 g,respectively.The results of Pb(Ⅱ)adsorption experiments shows that the three fiber samples from fruit pomace had similar adsorption properties.Within the concentration range of 1~4μg/mL,with the increase of the initial Pb(Ⅱ)concentration,both the equilibrium adsorption capacity and adsorption rate increased significantly(P≤0.05).When the initial concentration was 4μg/mL,the AKF had the highest equilibrium adsorption capacity and adsorption rate(which were 394.86μg/g and 33.18μg/min,respectively),followed by AF,with the WF being the lowest.The results of adsorption kinetics and thermodynamics tests showed that the adsorption processes of Pb(II)by the three fibers from the fruit pomacewere more in line with a quasi-second-order kinetic model,with chemical adsorption being the main adsorption mode.The adsorption process was an exothermic reaction,with an appropriate low temperature being conducive to the adsorption.The results showed that fibers from Laian Malus asiatica fruit pomace have good water-and oil-absorption properties,and a strong adsorption ability for Pb(II)in aqueous solutions,which will lead to good application prospects in the fields of functional food additives and water treatment.

关 键 词：来安花红果渣 纤维素 Pb(Ⅱ)吸附 平衡吸附量 

分 类 号：TS209[轻工技术与工程—食品科学] O647.3[轻工技术与工程—食品科学与工程]