An additive for removal of PO43-, increasing the biological activity and sedimentation rate of sludge in wastewater treatment was evaluated using materials of low price such as clinoptilolite-containing rock, FeSO4.7H2O and lime stone. Dry grinding at ambient temperature as an economic technology was applied. Mechanochemical transformations proceeded in the course of grinding and resulted in formation of iron(III)-oxide-hydroxide being able to react quantitatively with the phosphate in the sewage. Transformations were followed by XRD and Mössbauer spectroscopy revealing the existence of such iron species.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry