吸附
没食子酸
化学
壳聚糖
核化学
朗缪尔吸附模型
水溶液
色谱法
化学工程
有机化学
抗氧化剂
工程类
作者
Songlin Fan,Zuqiang Huang,Yanjuan Zhang,Huayu Hu,Xin Liang,Sha Gong,Jing Zhou,Ru Tu
标识
DOI:10.1016/j.biortech.2018.11.078
摘要
The phenolic substances in sugarcane juice seriously affect the color value of sugar products, and gallic acid is one of the main phenolic substances. To develop a new adsorbent able to effectively adsorb phenolic substances from sugarcane juice, magnetic chitosan (CS) hydroxyapatite (HA) microspheres (MCHAM) were prepared by growing HA on magnetic CS microspheres (MCM) in-situ. MCHAM could effectively adsorb gallic acid from sucrose solution, and the highest adsorption capacity was 40.77 mg g-1. The adsorption kinetics indicated that the adsorption process fit the pseudo-second-order mode, the dominant mechanism was chemisorption, and the Langmuir isotherm mode (qm = 48.12 mg g-1) described the adsorption behavior of MCHAM best. Recycling experiments indicated that the MCHAM adsorbent presented considerable repeatability. Compared to treating phenolic substances in sugarcane juice using traditional clarifying agents, treatment methods employing MCHAM can efficiently and simply remove phenolic substances without leaving residual sulfur in sugarcane juice.
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