Borosilicate glasses modified with organic ligands: a new selective approach for the removal of uranyl ion.
Barium borosilicate glass was found to have high uptake capacity for many cations. To improve its selectivity, surface modification was carried out. In order to make the glass selective towards uranyl ion, organic ligands like tri-n-octylphosphine oxide (TOPO) and 8-hydroxy quinoline (Oxine) were used. It was observed that the surface modification resulted in the change in uptake property of the glass. The uptake process was faster and within 5 h, 90% of the uranyl ion could be taken up from a 0.01 mM solution. With use of the modified barium borosilicate glass and EDTA as masking agent, uranyl ion could be selectively removed from mixtures of cations.
Ramkumar
Jayshree
J
Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India. jrk@barc.gov.in
Chandramouleeswaran
S
S
Sudarsan
V
V
Mishra
R K
RK
Kaushik
C P
CP
Raj
Kanwar
K
Mukherjee
Tulsi
T
Tyagi
A K
AK
D000327:Adsorption; D017609:Barium Compounds / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry; D004492:Edetic Acid / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D009942:Organometallic Compounds / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry; D015125:Oxyquinoline / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*
D017609:Barium Compounds; D002614:Chelating Agents; D008024:Ligands; D009942:Organometallic Compounds; D009943:Organophosphorus Compounds; D017640:Silicates; C415406:barium borosilicate; C005460:uranyl acetate; D015125:Oxyquinoline; C044965:trioctyl phosphine oxide; D004492:Edetic Acid