Selective strontium adsorption using synthesized sodium titanate in aqueous solutionopen access
- Authors
- Kim, Gyuhyeon; Lee, Dae Sung; Eccles, Harry; Kim, Su Min; Cho, Hyun Uk; Park, Jong Moon
- Issue Date
- 22-Jun-2022
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.12, no.29, pp.18936 - 18944
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 12
- Number
- 29
- Start Page
- 18936
- End Page
- 18944
- URI
- https://scholarworks.bwise.kr/gnu/handle/sw.gnu/1155
- DOI
- 10.1039/d2ra02494b
- ISSN
- 2046-2069
- Abstract
- Amorphous sodium titanates were synthesized using a mid-temperature sol-gel method for evaluation as selective adsorbents of strontium in the presence of cesium or metal cations (Al3+, Mg2+, Ca2+, and Mn2+) from aqueous solution. Synthesized sodium titanate showed high adsorption capacity and selectivity for strontium. The maximum adsorption capacity of strontium by sodium titanate was 193.93 mg g(-1) in aqueous solution containing an initial concentration of 5 mM (438.60 mg L-1) strontium and 5 mM (666.67 mg L-1) cesium, and this sodium titanate removed 99.9% of the strontium and 40.67% of cesium from an aqueous solution that had an initial concentration of 1.14 mM (100 mg L-1) strontium and 0.75 mM (100 mg L-1) cesium. Strontium adsorption by synthesized sodium titanate followed pseudo-second-order kinetics and a generalized Langmuir isotherm model, and reached an adsorption equilibrium within 1 h with high adsorption capacity at equilibrium. Adsorbed strontium onto synthesized sodium titanate showed the behavior of forming a strontium titanate structure with a titanate frame via surface precipitation.
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