Novel green chitosan-pectin gel beads for the removal of Cu(II), Cd(II), Hg(II) and Pb(II) from aqueous solution

被引：74
|
作者：
Shao, Zhiying [1 ]
Lu, Jilai [1 ]
Ding, Jian [1 ]
Fan, Fengjiao [1 ]
Sun, Xinyang [1 ]
Li, Peng [1 ]
Fang, Yong [1 ]
Hu, Qiuhui [1 ]
机构：
[1] Nanjing Univ Finance & Econ, Coll Food Sci & Engn, Nanjing 210023, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2021年 / 176卷
基金：
中国国家自然科学基金;
关键词：
Chitosan; Pectin; Heavy metal adsorption;
D O I：
10.1016/j.ijbiomac.2021.02.037
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：
Chitosan-pectin gel beads (CPBs) were synthesized via a facile and green method and applied to remove heavy metals from aqueous solution. The structural characteristics of CPBs were investigated by SEM and FTIR, the mechanical strength of CPBs was measured by Texture Analyzer and the stability of CPBs was evaluated in acidic solution. To study the adsorption characteristics, the effect of pH, contact time, initial heavy metals concentration, temperature, adsorption mechanism and regeneration were systematically investigated. The adsorption kinetics fitted well pseudo-second-order model, and the adsorption isotherms were well described by Langmuir model. The maximum adsorption capacities of Cu(II), Cd(II), Hg(II) and Pb(II) were 169.4, 177.6, 208.5 and 266.5 mg/g, respectively. The adsorption-desorption experiments revealed that the CPBs exhibited a great reusability. Thus, the synthesized CPBs in this study had the potential to be utilized as an environment-friendly and green adsorbent for the removal of heavy metals. (c) 2021 Elsevier B.V. All rights reserved.
引用
收藏
页码：217 / 225
页数：9
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