NDLI: A modified method for removal and stabilization of cesium metal in the vitrified matrix

Content Provider	Springer Nature Link
Author	Ghaffar, A. Mazhar, F. Mashiatullah, A. Alaamer, A. S.
Copyright Year	2012
Abstract	Laboratory experiments were designed to investigate the separation and stabilization of cesium metal. Cesium was removed from simulated waste through sorption under certain physicochemical conditions. Silica sand (locally purchased) was used to remove cesium from simulated liquid waste. The range of pH and temperature was optimized and maximum removal (94–98%) of cesium was achieved with pH 10 at the temperature 36°C. Under optimized conditions with a temperature range of 301–315K ΔH, ΔSand ΔG $_{309 K}$ for 150 ppm solution are −27.22 ± 0.18 KJ/mol, −74.1 ± 0.96 J/mol and −3071 ± 2.1 KJ/mol respectively, and for 200 ppm solution thermodynamic entities are ΔH = −20.2 ± 0.20 KJ/mol, ΔS = −47.86 ± 0.66 J/mol and ΔG $_{301 K}$ = −4344 ± 3.7 KJ/mol. The sorbed metal ion has chances of desorption under changed physicochemical conditions in final disposal. To overcome this problem the final “secondary waste (metals on sorbents)” was stabilized by converting it into a stable vitreous borosilicate matrix through the vitrification process to prevent leaching. It was found that the sorbed cesium was evaporated during heating at 1250°C. The evaporation of cesium during vitrification was overcome by modifying the process. This modified vitrification process is found excellent to immobilize the sorbed cesium. Stability was tested by desorption attempts at different pH.
Starting Page	258
Ending Page	263
Page Count	6
File Format	PDF
ISSN	1063455X
Journal	Journal of Water Chemistry and Technology
Volume Number	34
Issue Number	6
e-ISSN	1934936X
Language	English
Publisher	Allerton Press, Inc.
Publisher Date	2013-01-08
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cesium removal borosilicate matrix leachability physiochemical conditions sorption and kinetics stabilization Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Water Science and Technology

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