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Adsorption isotherms and mechanisms of Cu(II) sorption onto TEMPO-mediated oxidized cellulose nanofibers
Division of Materials and Environmental Chemistry, Stockholm University.
Division of Materials and Environmental Chemistry, Stockholm University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
Division of Materials and Environmental Chemistry, Stockholm University.
Number of Authors: 4
2016 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 6, no 109, 107759-107767 p.Article in journal (Refereed) Published
Abstract [en]

2,2,6,6-Tetramethyl-1-piperidinyloxy (TEMPO) mediated oxidized cellulose nanofibers (TOCNF) have shown potential in the removal of metal ions from contaminated water owing to their abundant carboxylate groups on their surface, functioning as metal sorption sites. The current work aims to study the kinetics and thermodynamics of the sorption behavior of Cu(II) onto TOCNF, and verify the correlation between Δ[H+] and the corresponding Δ[Cu(II)] in aqueous solution during sorption. Sorption of Cu(II) onto TOCNF was found to be an exothermic process with fast kinetics; reaching equilibrium Cu(II) adsorption in less than 1 min. The sorption data fits well with Langmuir isotherm models. The SEM imaging of the TOCNF after Cu(II) sorption revealed interesting copper-containing nanoparticles, which was further analyzed by using XRD. Besides, a linear correlation between Δ[H+] and the corresponding Δ[Cu(II)] in the solution was found, which indicates that the Cu(II) sorption capacity might be well predicted and calculated by Δ[H+] or pH variation during Cu(II) ion sorption onto TEMPO oxidized nanocellulose fibers and have potential to develop online sensors for tracking metal ion removal. 

Place, publisher, year, edition, pages
2016. Vol. 6, no 109, 107759-107767 p.
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-60566DOI: 10.1039/C6RA22397DISI: 000389342400078Scopus ID: 2-s2.0-84996554007OAI: oai:DiVA.org:ltu-60566DiVA: diva2:1048078
Note

Validerad; 2017; Nivå 2; 2016-12-19 (andbra)

Available from: 2016-11-20 Created: 2016-11-20 Last updated: 2017-01-10Bibliographically approved

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