Study on the adsorption of Congo Red (CR) onto graphene oxide/ polyvinyl alcohol / Fe3O4 | Zendy

Le Dieu Thu | Zendy; Hoang Vinh Tran | Zendy

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Study on the adsorption of Congo Red (CR) onto graphene oxide/ polyvinyl alcohol / Fe3O4

Author(s) -

Le Dieu Thu,

Hoang Vinh Tran

Publication year - 2022

Publication title -

vietnam journal of catalysis and adsorption

Language(s) - English

Resource type - Journals

ISSN - 0866-7411

DOI - 10.51316/jca.2021.086

Subject(s) - congo red , adsorption , polyvinyl alcohol , monolayer , graphene , oxide , langmuir , freundlich equation , aqueous solution , chemical engineering , langmuir adsorption model , chemistry , materials science , nuclear chemistry , inorganic chemistry , organic chemistry , nanotechnology , engineering

Graphene oxide/polyvinyl alcohol/Fe3O4 (GPF) nanocomposites, which have been synthesized successfully in the previous study [6], have been investigated the removal of Congo Red (CR) from aqueous solution. The results show that, the adsorption process get equilibrium state after 80 min., the optimal amount of adsorbent is 0.01 g and this process is favorable at low temperature. The Congo red adsorption is better described by the Langmuir model (R2 = 0.991) than by the Freundlich model (R2 = 0.957). So, it can be presumed that Congo red was adsorbed in a single monolayer with the maximum adsorption capacity of 23.31 mg/g.

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