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Studies on gelation of sodium silicate hydrosol for immobilization of high level liquid waste (HLLW).

Abstract

Immobilization of the simulated high-level liquid waste (HLLW) was performed via the gelation with sodium silicate hydrosol at room temperature. The simulated waste in this study, was represented by the electrolytes of Li, Na, K, Cs, Co and Sr at different concentrations. Specific loading of the liquid waste with 0.6 M Mg (NO{sub 3})2 and tailoring with Al salts were tried during most of the gelation processes. Mineral acid (HCl or {sub 3}) were added during the gelation processes to achieve the gel point, especially when lower concentrations of the simulated waste were used. The obtained hydrogel were dried to obtain the solid gel form. The gelation processes were investigated in terms of the different factors that affected them, namely: temperature, pH, changes in the concentration of the initial hydrosol and the used electrolytes. The efficiency of the gelation processes was investigated from the ratio of the amount of simulated waste reacted (m mole) to the initial silicate used (m mole), i.e. X value. Lower X values were observed when using multi valent cations (higher polarizing power). A special effect of increasing the sorption of metal cations in the silica matrix was observed when Al{sup 3+} replaced Si{sup 4+} in  More>>
Authors:
Abdel Raouf, M W; [1]  Sharaf El-deen, A N; El-Dessouky, M M [2] 
  1. Hot Lab. Centre, Atomic Energy Authority, Cairo (Egypt)
  2. Military Technical College, Kobry El-Kobbah, Cairo (Egypt)
Publication Date:
Oct 01, 1995
Product Type:
Miscellaneous
Report Number:
INIS-EG-001; CONF-9411323-
Reference Number:
SCA: 052001; PA: AIX-28:031449; EDB-97:053839; SN: 97001765677
Resource Relation:
Conference: 2. Arab conference on the peaceful uses of atomic energy, Cairo (Egypt), 5-9 Nov 1994; Other Information: PBD: Oct 1995; Related Information: Is Part Of Proceedings of the second Arab conference on the peaceful uses of atomic energy. Part II: A and B; Barakat, M.F.; El-Mashri, S.M. [eds.]; PB: 1199 p.
Subject:
05 NUCLEAR FUELS; LIQUID WASTES; GELATION; SODIUM SILICATES; CATIONS; EXPERIMENTAL DATA; HYDROCHLORIC ACID; METALS; NITRIC ACID; SOLIDIFICATION
OSTI ID:
456115
Research Organizations:
Atomic Energy Authority, Cairo (Egypt); Arab Atomic Energy Agency (AAEA), Tunis (Tunisia); Middle Eastern Regional Radioisotope Centre for the Arab Countries, Cairo (Egypt)
Country of Origin:
Egypt
Language:
English
Other Identifying Numbers:
Other: ON: DE97620040; ISBN 9973-9927-3-3; TRN: EG9601657031449
Availability:
INIS; OSTI as DE97620040
Submitting Site:
INIS
Size:
pp. 357
Announcement Date:

Citation Formats

Abdel Raouf, M W, Sharaf El-deen, A N, and El-Dessouky, M M. Studies on gelation of sodium silicate hydrosol for immobilization of high level liquid waste (HLLW).. Egypt: N. p., 1995. Web.
Abdel Raouf, M W, Sharaf El-deen, A N, & El-Dessouky, M M. Studies on gelation of sodium silicate hydrosol for immobilization of high level liquid waste (HLLW).. Egypt.
Abdel Raouf, M W, Sharaf El-deen, A N, and El-Dessouky, M M. 1995. "Studies on gelation of sodium silicate hydrosol for immobilization of high level liquid waste (HLLW)." Egypt.
@misc{etde_456115,
title = {Studies on gelation of sodium silicate hydrosol for immobilization of high level liquid waste (HLLW).}
author = {Abdel Raouf, M W, Sharaf El-deen, A N, and El-Dessouky, M M}
abstractNote = {Immobilization of the simulated high-level liquid waste (HLLW) was performed via the gelation with sodium silicate hydrosol at room temperature. The simulated waste in this study, was represented by the electrolytes of Li, Na, K, Cs, Co and Sr at different concentrations. Specific loading of the liquid waste with 0.6 M Mg (NO{sub 3})2 and tailoring with Al salts were tried during most of the gelation processes. Mineral acid (HCl or {sub 3}) were added during the gelation processes to achieve the gel point, especially when lower concentrations of the simulated waste were used. The obtained hydrogel were dried to obtain the solid gel form. The gelation processes were investigated in terms of the different factors that affected them, namely: temperature, pH, changes in the concentration of the initial hydrosol and the used electrolytes. The efficiency of the gelation processes was investigated from the ratio of the amount of simulated waste reacted (m mole) to the initial silicate used (m mole), i.e. X value. Lower X values were observed when using multi valent cations (higher polarizing power). A special effect of increasing the sorption of metal cations in the silica matrix was observed when Al{sup 3+} replaced Si{sup 4+} in the three-dimensional network structure of the matrix. 3 figs., 7 tabs.}
place = {Egypt}
year = {1995}
month = {Oct}
}