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Studies Relating to Adsorption and Recovery of Ultra Trace Uranium from Seawater by Amidoxime Resin
Last modified: 2016-11-16
Abstract
Nuclear energy is becoming a promising option to fulfil the rising energy demand. At present due
to depletion of fossil fuels day by day and finite terrestrial uranium reserves
almost all nuclear states are establishing methods to extract this metal from
sea. Concentration of uranium in seawater is 3.3 ppb. In this work a technique is developed for the
determination of uranium concentration in known concentration solutions of
uranyl nitrate and in seawater. Determination of uranium concentration is done
by the 797 VA Computrace apparatus. A built-in method AB266 is used for this
work. [1] Extraction of uranium has done through its adsorption on amidoxime
resin (commercial name “puorolite S910”) which has greater affinity for uranium
in seawater. Batch and continuous mode uranium loading studies have been
performed in Chemical Lab KINPOE Karachi. Experimental results shows that
loading capacity of resin in continuous mode is 0.12 g U/kg adsorbent for
natural seawater for 30 days and 3.35 g U/kg adsorbent in batch mode with spiked seawater. Elution of uranium from amidoxime resin also performed with HCl. Elution efficiency with 0.5M HCl for 1st
and 2nd elution in 180 minutes is 87.8% and 78.76% for resins used
in continuous and batch loading respectively.[4] Literature survey on
experimental method for the synthesis of amidoxime based high surface area
polymer fibre resin also described.[2][3][5]
to depletion of fossil fuels day by day and finite terrestrial uranium reserves
almost all nuclear states are establishing methods to extract this metal from
sea. Concentration of uranium in seawater is 3.3 ppb. In this work a technique is developed for the
determination of uranium concentration in known concentration solutions of
uranyl nitrate and in seawater. Determination of uranium concentration is done
by the 797 VA Computrace apparatus. A built-in method AB266 is used for this
work. [1] Extraction of uranium has done through its adsorption on amidoxime
resin (commercial name “puorolite S910”) which has greater affinity for uranium
in seawater. Batch and continuous mode uranium loading studies have been
performed in Chemical Lab KINPOE Karachi. Experimental results shows that
loading capacity of resin in continuous mode is 0.12 g U/kg adsorbent for
natural seawater for 30 days and 3.35 g U/kg adsorbent in batch mode with spiked seawater. Elution of uranium from amidoxime resin also performed with HCl. Elution efficiency with 0.5M HCl for 1st
and 2nd elution in 180 minutes is 87.8% and 78.76% for resins used
in continuous and batch loading respectively.[4] Literature survey on
experimental method for the synthesis of amidoxime based high surface area
polymer fibre resin also described.[2][3][5]
References
[1] No. 266/1 e Application Bulletin ,Determination of titanium and uranium by voltammetry.:Metrohm.
[2] Yatsandra Oyola and Sheng Dai, "High surface-area amidoxime-based polymer fibers co-grafted with various acid monomers yielding increased adsorption capacity for the extraction of uranium from seawater," 2016.
[3] S. Das,W.-P. Liao,S. Yiacoumi, "Experiments and Modeling of Uranium Uptake by Amidoxime-Based Adsorbent in the Presence of Other Ions in Simulated Seawater," Industrial & Engineering Chemistry Research, november 2015.
[4] Li-Jung Kuo,Chien M. Wai,Naomi Miyamoto,Ruma Joshi, "Elution of Uranium and Transition Metals from Amidoxime-Based Polymer Adsorbents for Sequestering Uranium from Seawater," Industrial & Engineering Chemistry Research, november 2015.
[5] Linfeng Rao, "Recent International R& D Activities in the Extraction of Uranium from Seawater," Chemical Science Division Lawerence Berkeley National laboratory, March 2010.
[2] Yatsandra Oyola and Sheng Dai, "High surface-area amidoxime-based polymer fibers co-grafted with various acid monomers yielding increased adsorption capacity for the extraction of uranium from seawater," 2016.
[3] S. Das,W.-P. Liao,S. Yiacoumi, "Experiments and Modeling of Uranium Uptake by Amidoxime-Based Adsorbent in the Presence of Other Ions in Simulated Seawater," Industrial & Engineering Chemistry Research, november 2015.
[4] Li-Jung Kuo,Chien M. Wai,Naomi Miyamoto,Ruma Joshi, "Elution of Uranium and Transition Metals from Amidoxime-Based Polymer Adsorbents for Sequestering Uranium from Seawater," Industrial & Engineering Chemistry Research, november 2015.
[5] Linfeng Rao, "Recent International R& D Activities in the Extraction of Uranium from Seawater," Chemical Science Division Lawerence Berkeley National laboratory, March 2010.