Highly porous alkali-activated foams for water and wastewater treatment

Thesis event information

Date and time of the thesis defence

Place of the thesis defence

TA105 Arina hall TA105 (Linnanmaa), University of Oulu

Topic of the dissertation

Highly porous alkali-activated foams for water and wastewater treatment

Doctoral candidate

Master of Science Mohammad Bhuyan

Faculty and unit

University of Oulu Graduate School, Faculty of Technology, Fibre and Particle Engineering

Subject of study

Process and Environmental Engineering


Senior Researcher Valentina Medri, Institute of Science, Technology and Sustainability for Ceramics


Associate Professor Tero Luukkonen, University of Oulu

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Highly Porous Alkali Activated Foams for Water and Wastewater Treatment

In this thesis, new materials for water and wastewater treatment were developed via alkali-activation technology. Alkali activation is a process that involves a chemical reaction between a solid aluminosilicate precursor and an alkaline activator, at temperatures below 100 °C. Alkali-activated materials are of interest in water and wastewater treatment due to their low-energy, cost-effective preparation process, reduced carbon emissions, and excellent properties such as high mechanical strength or ion exchange capacity. The raw materials studied in this thesis were blast furnace slag, a by-product from iron manufacturing, and metakaolin, a calcined natural clay. Both are available in Finland. The thesis focuses on the development of new production routes for porous alkali-activated materials, and to respond the water pollution with these materials. The thesis made completely new research openings for alkali-activated materials in point-of-use water disinfection and microplastics separation from water. The results demonstrate that porous alkali-activated materials could be sustainable options for conventional ceramic water filters in these applications.
Last updated: 26.4.2024