A1 Journal article (refereed)
Column Adsorption Studies for the Removal of Ammonium Using Na-Zeolite-Based Geopolymers (2022)

Sundhararasu, E., Runtti, H., Kangas, T., Pesonen, J., Lassi, U., & Tuomikoski, S. (2022). Column Adsorption Studies for the Removal of Ammonium Using Na-Zeolite-Based Geopolymers. Resources, 11(12), Article 119. https://doi.org/10.3390/resources11120119

JYU authors or editors

Publication details

All authors or editorsSundhararasu, Elavarasi; Runtti, Hanna; Kangas, Teija; Pesonen, Janne; Lassi, Ulla; Tuomikoski, Sari

Journal or seriesResources


Publication year2022

Publication date11/12/2022


Issue number12

Article number119

PublisherMDPI AG

Publication countrySwitzerland

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessOpen Access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/84353


The aim of this study was to examine the removal of ammonium ions from a synthetic model solution by using Na-zeolite-based geopolymers. Na-zeolite (=analcime) is a residue from mining industry. Three adsorbents were prepared from Na-zeolite using different production steps and metakaolin as a blending agent. These novel adsorbents were investigated in a fixed-bed column system where the effects of different flow rates with the initial ammonium concentration of 40 mg/L were studied. The Thomas, Bohart–Adams and Yoon–Nelson breakthrough curve models fitted well with the experimental data with a high R2 value. After adsorption experiments, adsorbents were regenerated using a mixture of 0.2 M NaCl and 0.1 M NaOH as a regeneration agent; after that, adsorbents were reutilised for ammonium ion adsorption for three adsorption–regeneration cycles. The results of the experiment indicate that all the prepared analcime-based geopolymers are suitable adsorbents for the removal of ammonium ions and that capacity remains nearly constant for two of them during two adsorption–regeneration cycles.


Free keywordsgeopolymer; fixed-bed column; ammonium ion; breakthrough models; regeneration

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Ministry reportingYes

Reporting Year2022

JUFO rating1

Last updated on 2024-15-06 at 01:45