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Sedimentation technique of waste bituminization and thermogravimetric characteristics of the final products

Technical Report:

Abstract

In the research centre of the Oesterreichische Studiengesellschaft fuer Atomenergie GesmbH a semitechnical plant has been installed for waste bituminization, which has been tested inactively since 1973. This plant is using a new technological process for embedding. One of the important features of this new process is that the, normally inactive solution water is distilled off prior to the embedding, resulting in dry and powdery salts. The second important feature is that the mixing of these dry salts with the thin fluid bitumen is done by sedimentation. Expecially there is no mechanical aid used for mixing. Thermogravimetric analysis of samples which simulated the final products of this pilot plant, were carried out to verify the best working parameters and to study the possible chemical damage to the bitumen. Analysis was performed by heating the samples, consisting of various mixtures of bitumen and inorganic salts, in a METTLER-Thermoanalyzer up to 500/sup 0/C using different atmospheres (air, nitrogen). It could be shown that only nitrate and nitrite especially in combination with Fe(III)-ions are of negative influence on the thermostability of bitumen. They lead to a sudden and quick weight loss of the samples between 370 and 410/sup 0/C (above the melting point  More>>
Publication Date:
Jan 01, 1976
Product Type:
Technical Report
Report Number:
SGAE-2557; CONF-760310-; CH-180/76
Reference Number:
AIX-08-319041; EDB-77-144401
Resource Relation:
Conference: IAEA symposium on the management of radioactive waste, Vienna, Austria, 22 Mar 1976
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTE PROCESSING; SOLIDIFICATION; RADIOACTIVE WASTES; THERMAL GRAVIMETRIC ANALYSIS; BITUMENS; HIGH TEMPERATURE; IRON IONS; NITRATES; NITRITES; PILOT PLANTS; RADIOACTIVE WASTE STORAGE; SEDIMENTATION; ATOMIC IONS; CHARGED PARTICLES; CHEMICAL ANALYSIS; FUNCTIONAL MODELS; GRAVIMETRIC ANALYSIS; IONS; MANAGEMENT; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PROCESSING; QUANTITATIVE CHEMICAL ANALYSIS; RADIOACTIVE MATERIALS; STORAGE; TAR; THERMAL ANALYSIS; WASTE MANAGEMENT; WASTE PROCESSING; WASTE STORAGE; WASTES; 052001* - Nuclear Fuels- Waste Processing
OSTI ID:
7300852
Research Organizations:
Oesterreichische Studiengesellschaft fuer Atomenergie G.m.b.H., Vienna
Country of Origin:
Austria
Language:
English
Submitting Site:
INIS
Size:
Pages: 13
Announcement Date:
May 13, 2001

Technical Report:

Citation Formats

Zeger, J, Knotik, K, and Jakusch, H. Sedimentation technique of waste bituminization and thermogravimetric characteristics of the final products. Austria: N. p., 1976. Web.
Zeger, J, Knotik, K, & Jakusch, H. Sedimentation technique of waste bituminization and thermogravimetric characteristics of the final products. Austria.
Zeger, J, Knotik, K, and Jakusch, H. 1976. "Sedimentation technique of waste bituminization and thermogravimetric characteristics of the final products." Austria.
@misc{etde_7300852,
title = {Sedimentation technique of waste bituminization and thermogravimetric characteristics of the final products}
author = {Zeger, J, Knotik, K, and Jakusch, H}
abstractNote = {In the research centre of the Oesterreichische Studiengesellschaft fuer Atomenergie GesmbH a semitechnical plant has been installed for waste bituminization, which has been tested inactively since 1973. This plant is using a new technological process for embedding. One of the important features of this new process is that the, normally inactive solution water is distilled off prior to the embedding, resulting in dry and powdery salts. The second important feature is that the mixing of these dry salts with the thin fluid bitumen is done by sedimentation. Expecially there is no mechanical aid used for mixing. Thermogravimetric analysis of samples which simulated the final products of this pilot plant, were carried out to verify the best working parameters and to study the possible chemical damage to the bitumen. Analysis was performed by heating the samples, consisting of various mixtures of bitumen and inorganic salts, in a METTLER-Thermoanalyzer up to 500/sup 0/C using different atmospheres (air, nitrogen). It could be shown that only nitrate and nitrite especially in combination with Fe(III)-ions are of negative influence on the thermostability of bitumen. They lead to a sudden and quick weight loss of the samples between 370 and 410/sup 0/C (above the melting point of both NaNO/sub 2/ and NaNO/sub 3/). The Fe-ions hava a catalytic influence, as it could be shown that 1 1% addiation of Fe(NO/sub 3/)/sub 3/ to NaNO/sub 3/ leads to a considerable acceleration of the incineration. This influence of the Fe(III)-ion can be suppressed to some extend by a hydrolysis prior to the embedding. In preparation of further studies concerning the behaviour of radiation damaged bitumen there has been developed a method of measuring the dose rate of an unknown radioactive salt mixture at any point of this mixture. This is done by making two measurements with glass dosimeters. One with a beta-absorber to get a pure gamma-dose and the other without it to get the combined beta and gamma dose.}
place = {Austria}
year = {1976}
month = {Jan}
}