期刊
CARBOHYDRATE POLYMERS
卷 255, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117338
关键词
Chitosan; Graphene oxide; Ionic liquid; Alkaloid; Magnetic solid phase extraction
资金
- Technology Research and Application Demonstration of Food Safety Social Co-governance Information [2017YFC1602001]
- Science and technology project of General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China [2016IK296]
A magnetically and recyclable multifunctional nanohybrid adsorbent was prepared by incorporating chitosan, graphene oxide, and ionic liquid, which showed enhanced adsorption capacity for alkaloids. The adsorbent could be potentially used for extracting illicit additives in food samples.
A magnetically and recyclable multifunctional nanohybrid adsorbent (IL-Fe3O4@SiO2@CS/GO) with chitosan, graphene oxide and ionic liquid was prepared by glutaraldehyde cross-linking reaction, acylation reaction and directly grafted method. The incorporation of CS, GO and IL could collaboratively enhance adsorption for 5 alkaloids. The Box-Benhnken design was applied to optimize the experimental parameters affecting the extraction efficiency. The adsorption kinetic was further used to describe the adsorption process, revealing alkaloids adsorption was a chemisorption process, which was well represented by pseudo-second-order model. Concerning the equilibrium behavior, the adsorption was multilayer and heterogeneous adsorption that satisfactorily modeled by the Freundlich model. Under optimal conditions, good adsorption capacity for morphine, codeine, ephedrine, amphetamine and benzoylecgonine (7.2, 8.4, 9.2, 5.8 and 11.2 mg g(-1), respectively) were obtained via multiple mechanisms to attain simultaneous extraction of alkaloids. Accordingly, IL-Fe3O4@SiO2@CS/GO nanohybrid adsorbent could be extended as a potential adsorbent for extraction of illicit additives in food samples.
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