Luukkonen, T., Yliniemi, J., Sreenivasan, H. et al. Ag- or Cu-modified geopolymer filters for water treatment manufactured by 3D printing, direct foaming, or granulation. Sci Rep 10, 7233 (2020). https://doi.org/10.1038/s41598-020-64228-5
Ag- or Cu-modified geopolymer filters for water treatment manufactured by 3D printing, direct foaming, or granulation
|Author:||Luukkonen, Tero1,2; Yliniemi, Juho1; Sreenivasan, Harisankar1;|
1Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran katu 1, Oulu, 90014, Finland
2Department of Industrial Engineering, University of Padua, via Marzolo, 9, Padua, 35131, Italy
3Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Aapistie 5 A, Oulu, 90220, Finland
|Online Access:||PDF Full Text (PDF, 3.4 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020050525107
|Publish Date:|| 2020-05-05
In this work, we compared the main characteristics of highly porous geopolymer components for water treatment applications manufactured by 3D printing, direct foaming, or granulation. Furthermore, different approaches to impregnate the materials with Ag or Cu were evaluated to obtain filters with disinfecting or catalytic properties. The results revealed that all of the investigated manufacturing methods enabled the fabrication of components that possessed mesoporosity, suitable mechanical strength, and water permeability, even though their morphologies were completely different. Total porosity and compressive strength values were 28 vol% and 16 MPa for 3D-printed, 70–79 vol% and 1 MPa for direct-foamed, and 27 vol% and 10 MPa for granule samples. Both the filter preparation and the metal impregnation method affected the amount, oxidation state, and stability of Ag and Cu in the filters. However, it was possible to prepare filters with low metal leaching between a pH of 3–7, so that the released Ag and Cu concentrations were within drinking water standards.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
215 Chemical engineering
216 Materials engineering
This work was supported by the Academy of Finland: grants #315103 and #322786. Part of the work was carried out with the support of the Centre for Material Analysis, University of Oulu, Finland.
|Academy of Finland Grant Number:||
315103 (Academy of Finland Funding decision)
322786 (Academy of Finland Funding decision)
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