Dissolution behaviour of iron silicate glass

• Published in: Hyperfine interactions 2009-07, Vol.192 (1-3), p.31-36
• Main Authors: Kubuki, Shiro, Akagi, Kenji, Sakka, Hiroshi, Homonnay, Zoltán, Sinkó, Katalin, Kuzmann, Ernő, Kurimoto, Hiroshi, Nishida, Tetsuaki
• Format: Article
• Language: English
• Subjects: Atomic; Condensed Matter Physics; Hadrons; Heavy Ions; Molecular; Nuclear Physics; Optical and Plasma Physics; Physics; Physics and Astronomy; Surfaces and Interfaces; Thin Films
• ISSN: 0304-3843; 1572-9540
• DOI: 10.1007/s10751-009-9943-6

A relationship between the water purifying effect and structure of 0.5 x Na 2 O·0.5 x CaO·5Fe 2 O 3 ·(95– x )SiO 2 glass (Na 2 O/CaO = 1; NCFS glass) with ‘ x ’ of 20 and 50 were investigated by means of 57 Fe-Mössbauer spectroscopy, X-ray diffraction (XRD), induced coupled plasma optical emission spectroscopy (ICP-OES), as well as absorption spectroscopy, pH and oxidation-reduction potential (ORP) measurements. In the case NCFS glass with ‘ x ’ of 20, dissolved amounts of total Fe, Na  +  , and Ca 2 +  were respectively estimated to be 13.6, 39.1 and 36.7 mg/l, after 10 day-leaching test. On the other hand, the dissolved amounts of total Fe, Na  +  and Ca 2 +  were determined to be 34.3, 647.6 and 667.6 mg/l, respectively when ‘ x ’ was 50. The original pH value of 6.0 was increased to 10.0 and 11.6 after leaching test of NCFS glasses with ‘ x ’ of 20 and 50, respectively. At the same time, the ORP value was decreased from 30.0 to −195.8 and −284.7 mV in the glasses with ‘ x ’ of 20 and 50, respectively.