Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 253: Issue 2
Local structure and chemical durability of FeOOH-fixed sodium silicate glass prepared from water glass
Authors:
T. Nishida Kinki University Department of Biological and Environmental Chemistry, Kyushu School of Engineering Kayanomori 11-6 Iizuka 820-8555 Japan

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and
H. Oku Kyushu University Department of Chemistry, Faculty of Science Hakozaki, Higashiku, Fukuoka 812-8555 Japan

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Pages:
303–306
Online Publication Date:
01 Nov 2004
Publication Date:
17 Aug 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1019618329877
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Abstract  

A 12M HCl solution of iron oxyhydroxide (a-FeOOH: goethite) was mixed with water glass (18Na2O.36SiO2.46H2O) at room temperature. The mixture (sol) changed into a dry gel when dried at 25 °C for 120 hours in air. Glass-ceramic and glass samples were prepared when the dry gel was heated for 1-3 hours in an electric furnace at 800 and 900 °C, respectively. The 57Fe Mössbauer spectrum of the dry gel is composed of a magnetic hyperfine structure owing to the formation of g-FeOOH (lepidocrocite). By contrast, the 57Fe Mössbauer spectrum of glass-ceramic and glasses is composed of paramagnetic Fe(III) with distorted tetrahedral symmetry. This proves that Fe(III) atoms occupy network-forming Si(IV) sites in the FeOOH-fixed sodium silicate glass. A leaching test of the silicate glass in the acid rain simulant composed of HNO3 (pH 3.5) and H2SO4 (pH 3.5) revealed high chemical durability, indicating that Fe(III) is firmly fixed in the glass matrix.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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