Hydrogel Based on Tricarboxi-Cellulose and Poly(Vinyl Alcohol) Used as Biosorbent for Cobalt Ions Retention

A biomaterial based on poly(vinyl alcohol) reticulated with tricarboxi-cellulose obtained by TEMPO oxidation (OxC25) was used as a new biosorbent for Co(II) ions retention from aqueous solutions. The biosorption process of Co(II) ions was studied while mainly considering the operational factors that...

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Bibliographic Details
Published in:Polymers 2021-04, Vol.13 (9), p.1444
Main Authors: Nica, Iulia, Zaharia, Carmen, Suteu, Daniela
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Alcohol
Aqueous solutions
Biodegradable materials
Biomedical materials
Cellulose
Diffusion
Hydrogels
Ligands
Metals
Oxidation
Pollutants
Polyvinyl alcohol
Water treatment
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Summary:A biomaterial based on poly(vinyl alcohol) reticulated with tricarboxi-cellulose obtained by TEMPO oxidation (OxC25) was used as a new biosorbent for Co(II) ions retention from aqueous solutions. The biosorption process of Co(II) ions was studied while mainly considering the operational factors that can influence it (i.e., biosorbent concentration, pH of the aqueous media, temperature and contact time of the phases). The maximum adsorption capacity was 181.82 mg/g, with the biosorption well fitted by the Langmuir model. The kinetic modeling of the biosorption process was based on certain models: Lagergreen (pseudo first order model), Ho (pseudo second order model), Elovich (heterogeneous biosorbent model), Webber-Morris (intraparticle diffusion model) and McKay (film diffusion model). The corresponding kinetic model suggests that this biosorption process followed a pseudo-second order kinetic model and was developed in two controlled steps beginning with film diffusion and followed by intraparticles diffusion.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13091444