Ionic chitosan/silica nanocomposite as efficient adsorbent for organic dyes

被引：41
作者：
Salama, Ahmed [1 ]
Abou-Zeid, Ragab E. [1 ]
机构：
[1] Natl Res Ctr, Cellulose & Paper Dept, 33 El Bohouth St,PO 12622, Giza, Egypt
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2021年 / 188卷
关键词：
Chitosan; Silica; Composite; Adsorption; Dyes; REMOVAL; ADSORPTION; HYDROGEL;
D O I：
10.1016/j.ijbiomac.2021.08.021
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：
A new adsorbent from chitosan and anionic silica was prepared by ionic interaction followed by sol-gel process. The obtained nanocomposite was characterized by different techniques: FTIR, XRD, SEM/EDX, TGA, and TEM. The results showed that silica precursor interacts with chitosan and deposits as regular spherical nanoparticles. The methylene blue (MB) adsorption by chitosan/silica nanocomposite achieved the adsorption equilibrium within 60 min. The adsorption method is fitted to the pseudo-second-order kinetic model and the Langmuir adsorption model with a maximum adsorption capacity of 847.5 mg/g at slight alkaline solution. Chitosan/silica composite displayed high regeneration capability and recovery of MB up to five cycles without the loss of the adsorption efficiency. The current study showed that as-prepared chitosan/silica nanocomposite is an appro-priate material for the adsorption of organic pollutants from wastewater.
引用
收藏
页码：404 / 410
页数：7
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