APPLICATION OF CROSS-LINKED CHITOSAN FOR NITRATE NITROGEN (V) REMOVAL FROM AQUEOUS SOLUTIONS

• Authors: Tomasz Jóźwiak , Urszula Filipkowska , Paula Szymczyk , Artur Mielcarek
• Languages of publication: EN EN

Abstracts

EN

This study was aimed at determining the possibility of applying non-cross-linked chitosan (CHs) as well as chitosan cross-linked with glutaraldehyde (CHs-GLA) and epichlorohydrin (CHSECH) for the removal of nitrates (V) from aqueous solutions. The scope of the study included determinations of: optimal pH value of nitrates sorption (from pH range of 2-11), equilibrium time of sorption process, and maximum N-NO3 sorption capacity of the analysed chitosan sorbents. Kinetics of nitrates sorption was described with pseudo-first and pseudo-second order equations, and with the intraparticle diffusion model. Sorption capacity analysis was conducted with the heterogeneous Langmuir model, the double Langmuir model and the Freundlich model. The optimal pH value of N-NO3 sorption onto CHs-GLA and CHs-ECH was pH 3, whereas onto CHs this was pH 4. The equilibrium time of sorption reaction was the same for all chitosan sorbents and reached 120 min. The maximum sorption capacity of CHs, CHs-GLA and CHs- ECH accounted for 12.71 mg N-NO3/g, 34.99 mg N-NO3/g and 38.47 mg N-NO3/g.

Keywords

EN

adsorption; chitosan beads; cross-linked chitosan beads; dyes; glutaraldehyde

Discipline

• ENVIRONMENT_&_ECOLOGY: ENVIRONMENT & ECOLOGY

• Publisher: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
• Journal: Progress on Chemistry and Application of Chitin and its Derivatives
• Year: 2014
• Volume: 19
• Pages: 41-52

Contributors

author

Tomasz Jóźwiak

• Department of Environmental Protection Engineering, University of Warmia and Mazury in Olsztyn

author

Urszula Filipkowska

• Department of Environmental Protection Engineering, University of Warmia and Mazury in Olsztyn

author

Paula Szymczyk

• Department of Environmental Protection Engineering, University of Warmia and Mazury in Olsztyn

author

Artur Mielcarek

• Department of Environmental Protection Engineering, University of Warmia and Mazury in Olsztyn

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• Document Type: article