![Laser-induced fluorescence for UO2 2+ in 0.1 M HClO4 (Excitation wavelength = 266 nm), [UO22+]: (a) 4×10-6 M, (b) 5×10-4 M and (c) 1×10-1 M.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_102_image_1.jpg "Laser-induced fluorescence for UO2 2+ in 0.1 M HClO4 (Excitation wavelength = 266 nm), [UO22+]: (a) 4×10-6 M, (b) 5×10-4 M and (c) 1×10-1 M.")
![Fluorescence decay curves for UO22+ ([UO22+] = 4×10-8 M, PMT voltage = -1.0 kV, emission wavelength = 509 nm) at different pHs. Solid lines were obtained from curve fit with single exponential function.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_111_image_7.jpg "Fluorescence decay curves for UO22+ ([UO22+] = 4×10-8 M, PMT voltage = -1.0 kV, emission wavelength = 509 nm) at different pHs. Solid lines were obtained from curve fit with single exponential function.")
![Lifetime variation of UO22+ ions as a function of the concentration of HClO4. The result obtained in this work, designated as dotted circle, shows the lifetime of 7.30±0.30 μs in 1.0 M HClO4. This value agrees well with the result (7.9±0.7 μs) obtained from a round-robin test in Ref. [3-1-18].](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_115_image_9.jpg "Lifetime variation of UO22+ ions as a function of the concentration of HClO4. The result obtained in this work, designated as dotted circle, shows the lifetime of 7.30±0.30 μs in 1.0 M HClO4. This value agrees well with the result (7.9±0.7 μs) obtained from a round-robin test in Ref. [3-1-18].")
![Fluorescence spectra measured as a function of time(1, 2, 4 and 6 months after sample preparation indicated by black, red, blue and green lines, respectively) for 3 different uranium saturated solutions([U(VI)]=4.2 μM (a), 0.2 mM (b) and 1.0 mM (c)).](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_188_image_45.jpg "Fluorescence spectra measured as a function of time(1, 2, 4 and 6 months after sample preparation indicated by black, red, blue and green lines, respectively) for 3 different uranium saturated solutions([U(VI)]=4.2 μM (a), 0.2 mM (b) and 1.0 mM (c)).")
![Spatial distribution of laser-induced plasma for uranium nanoparticles ([U] = 4.2 μM).](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_193_image_49.jpg "Spatial distribution of laser-induced plasma for uranium nanoparticles ([U] = 4.2 μM).")
![LWCC-based UV-Vis absorption spectra of U(VI)-DHB charge-transfer complex with increasing DHB concentration at pH 4.6. The inset graph shows the absorbance changes at 380 nm and 460 nm. The bottom trace marked with * is the spectrum of a DHB-free solution, [U(VI)total] = 20 μM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_383_image_141.jpg "LWCC-based UV-Vis absorption spectra of U(VI)-DHB charge-transfer complex with increasing DHB concentration at pH 4.6. The inset graph shows the absorbance changes at 380 nm and 460 nm. The bottom trace marked with * is the spectrum of a DHB-free solution, [U(VI)total] = 20 μM.")
![Job’s plots demonstrating the formation of U(VI)-DHB CT complex at two different pH levels. The absorbance was monitored at 460 nm with a total concentration of 3 mM (= [U(VI)] + [DHB]). χA1 and χA2 are the DHB mole fraction of maximum absorbance change at pH 3.5 and pH 4.6; 0.50 and 0.65, respectively. χB1 and χB2 are ones that obtained by using the initial tangent method; 0.47 and 0.60, respectively (see ref. [3-8-29] for details about each method).](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_384_image_142.jpg "Job’s plots demonstrating the formation of U(VI)-DHB CT complex at two different pH levels. The absorbance was monitored at 460 nm with a total concentration of 3 mM (= [U(VI)] + [DHB]). χA1 and χA2 are the DHB mole fraction of maximum absorbance change at pH 3.5 and pH 4.6; 0.50 and 0.65, respectively. χB1 and χB2 are ones that obtained by using the initial tangent method; 0.47 and 0.60, respectively (see ref. [3-8-29] for details about each method).")
![Scatchard plots for the spectrophotometric data collected at 460 nm and pH 4.6 by using two different [DHB] sets calculated from (a) a speciation program (HySS2009®) with the literature log β values of hydroxouranyl species and U(VI)-DHB formation constants (K 1 and K 2) determined in this study; (b) the numerical methods seeking converged equilibrium constants (K ' 3 and K ' 4 [3-8-23]). Note that ΔA, [M0] and [DHB] indicate the absorbance change measured, unbound DHB concentration and total U(VI) concentration (1 mM), respectively.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_385_image_143.jpg "Scatchard plots for the spectrophotometric data collected at 460 nm and pH 4.6 by using two different [DHB] sets calculated from (a) a speciation program (HySS2009®) with the literature log β values of hydroxouranyl species and U(VI)-DHB formation constants (K 1 and K 2) determined in this study; (b) the numerical methods seeking converged equilibrium constants (K ' 3 and K ' 4 [3-8-23]). Note that ΔA, [M0] and [DHB] indicate the absorbance change measured, unbound DHB concentration and total U(VI) concentration (1 mM), respectively.")
![Absorption spectra of salicylic acid in 0.1 M NaClO4 solutions as a function of pH. [salicylate]tot = 0.25 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_404_image_149.jpg "Absorption spectra of salicylic acid in 0.1 M NaClO4 solutions as a function of pH. [salicylate]tot = 0.25 mM.")
![Absorbance of salicylic acid at 296 nm measured in 0.1 M NaClO4 solutions as a function of pH. [salicylate]tot = 0.25 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_405_image_150.jpg "Absorbance of salicylic acid at 296 nm measured in 0.1 M NaClO4 solutions as a function of pH. [salicylate]tot = 0.25 mM.")
![Absorption spectra of picolinic acid in 0.1 M NaClO4 solutions as a function of pH. [picolinate]tot = 0.25 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_406_image_151.jpg "Absorption spectra of picolinic acid in 0.1 M NaClO4 solutions as a function of pH. [picolinate]tot = 0.25 mM.")
![Absorbance of picolinic acid at 264 nm measured in 0.1 M NaClO4 solutions of various pHs. [picolinate]tot = 0.25 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_407_image_152.jpg "Absorbance of picolinic acid at 264 nm measured in 0.1 M NaClO4 solutions of various pHs. [picolinate]tot = 0.25 mM.")
![Calculated U(VI) species distribution against pH in the presence of picolinic acid. [U(VI)]tot = 0.1 mM, [picolinate]tot = 0.5 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_421_image_162.jpg "Calculated U(VI) species distribution against pH in the presence of picolinic acid. [U(VI)]tot = 0.1 mM, [picolinate]tot = 0.5 mM.")
![Eu(III) species distribution in the presence of picolinate ligand is calculated as a function of pH. [Eu(III)] = 0.1 mM, [picolinate] = 0.5 mM, I = 0.1 M NaClO4.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_438_image_167.jpg "Eu(III) species distribution in the presence of picolinate ligand is calculated as a function of pH. [Eu(III)] = 0.1 mM, [picolinate] = 0.5 mM, I = 0.1 M NaClO4.")
![Potentiometric titration of aged and unaged TiO2. [TiO2] = 10 g/L, I = 0.1 M NaClO4, [H+]initial = 1 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_442_image_168.jpg "Potentiometric titration of aged and unaged TiO2. [TiO2] = 10 g/L, I = 0.1 M NaClO4, [H+]initial = 1 mM.")
![Comparison of adsorption between Eu(III) (solid symbol) and Am(III) (open symbol) on various surfaces. [NaClO4] = 10 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_468_image_181.jpg "Comparison of adsorption between Eu(III) (solid symbol) and Am(III) (open symbol) on various surfaces. [NaClO4] = 10 mM.")
![The adsorption of U(VI) on SiO2 ([U(VI)]tot = 2.4, 24 and 200 μ mol/g) at various pHs in the absence or presence of Eu(III).](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_491_image_189.jpg "The adsorption of U(VI) on SiO2 ([U(VI)]tot = 2.4, 24 and 200 μ mol/g) at various pHs in the absence or presence of Eu(III).")
![The adsorption of Eu(III) on SiO2 ([Eu(III)]tot = 2.4 and 24 μmol/g) at various pHs in the absence or presence of U(VI).](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_492_image_190.jpg "The adsorption of Eu(III) on SiO2 ([Eu(III)]tot = 2.4 and 24 μmol/g) at various pHs in the absence or presence of U(VI).")
![The concentration of U(VI) and Eu(III) determined in solutions of various pHs. [Eu(III)]tot = 0.02 mM, [U(VI)]tot = 1.7 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_495_image_191.jpg "The concentration of U(VI) and Eu(III) determined in solutions of various pHs. [Eu(III)]tot = 0.02 mM, [U(VI)]tot = 1.7 mM.")
![The emission spectra of U(VI)-Eu(III) on SiO2 surface at various U(VI) concentrations. The spectra normalized at Eu(III) emission (613 nm) are shown together in a small square. [Eu(III)]tot = 24 μmol/g, [U(VI)]tot = 0 to 48 μ mol/g, pH = 6.58±0.11.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_497_image_192.jpg "The emission spectra of U(VI)-Eu(III) on SiO2 surface at various U(VI) concentrations. The spectra normalized at Eu(III) emission (613 nm) are shown together in a small square. [Eu(III)]tot = 24 μmol/g, [U(VI)]tot = 0 to 48 μ mol/g, pH = 6.58±0.11.")
![The emission spectra of U(VI)-Eu(III) on SiO2 surface at various Eu(III) concentrations. The spectra normalized at U(VI) emission (505 nm) are shown together. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_502_image_195.jpg "The emission spectra of U(VI)-Eu(III) on SiO2 surface at various Eu(III) concentrations. The spectra normalized at U(VI) emission (505 nm) are shown together. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.")
![Stern-Volmer relationship of U(VI) luminescence intensity (506 nm) against Eu(III) concentration. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μ mol/g, pH = 7.01±0.10.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_503_image_196.jpg "Stern-Volmer relationship of U(VI) luminescence intensity (506 nm) against Eu(III) concentration. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μ mol/g, pH = 7.01±0.10.")
![The emission intensity of U(VI) and Eu(III) at various Eu(III) concentrations. Intensity was calculated as a peak area of deconvoluted spectra before and after normalizing at U(VI) emission (505 nm) for U(VI) and Eu(III), respectively. [Eu(III)]tot= 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_505_image_197.jpg "The emission intensity of U(VI) and Eu(III) at various Eu(III) concentrations. Intensity was calculated as a peak area of deconvoluted spectra before and after normalizing at U(VI) emission (505 nm) for U(VI) and Eu(III), respectively. [Eu(III)]tot= 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.")
![The emission spectra of U(VI)-Eu(III) on SiO2 surface at various total concentrations of uranium and europium. The intensities are normalized at 506 nm. [U(VI)]tot = 2, 5, 10, 40 and 80 μmol/g, [Eu(III)]tot/[U(VI)]tot = 1 and 2, pH = 7.15±0.23.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_506_image_198.jpg "The emission spectra of U(VI)-Eu(III) on SiO2 surface at various total concentrations of uranium and europium. The intensities are normalized at 506 nm. [U(VI)]tot = 2, 5, 10, 40 and 80 μmol/g, [Eu(III)]tot/[U(VI)]tot = 1 and 2, pH = 7.15±0.23.")
![The emission intensity ratio of Eu(III) corresponding to the transitions of 5D0→7F1 (590 nm) to that of 5D0→7F2 (613 nm) at various total concentrations of U(VI). [U(VI)]tot = 2 to 80 μmol/g, [Eu(III)]tot/[U(VI)]tot = 1 or 2, pH = 7.15±0.23.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_508_image_199.jpg "The emission intensity ratio of Eu(III) corresponding to the transitions of 5D0→7F1 (590 nm) to that of 5D0→7F2 (613 nm) at various total concentrations of U(VI). [U(VI)]tot = 2 to 80 μmol/g, [Eu(III)]tot/[U(VI)]tot = 1 or 2, pH = 7.15±0.23.")
![Spectrum difference from that of [U]/[Eu] = 2/4 μmol/g for [Eu]/[U] = 1 in Fig. 3-9-48.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_510_image_200.jpg "Spectrum difference from that of [U]/[Eu] = 2/4 μmol/g for [Eu]/[U] = 1 in Fig. 3-9-48.")
![Spectrum difference from that of [U]/[Eu] = 2/4 μmol/g for [Eu]/[U] = 2 in Fig. 3-9-48.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_511_image_201.jpg "Spectrum difference from that of [U]/[Eu] = 2/4 μmol/g for [Eu]/[U] = 2 in Fig. 3-9-48.")
![The emission spectra of U(VI)-Eu(III) precipitates at various pH. The intensities are normalized at 513 nm. [Eu(III)]tot = 0.02, [U(VI)]tot = 1.5 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_513_image_203.jpg "The emission spectra of U(VI)-Eu(III) precipitates at various pH. The intensities are normalized at 513 nm. [Eu(III)]tot = 0.02, [U(VI)]tot = 1.5 mM.")
![Lifetime of U(VI) on SiO2 surface at various Eu(III) concentrations. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_517_image_204.jpg "Lifetime of U(VI) on SiO2 surface at various Eu(III) concentrations. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.")
![Lifetime of Eu(III) on SiO2 surface at various Eu(III) concentrations. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_518_image_205.jpg "Lifetime of Eu(III) on SiO2 surface at various Eu(III) concentrations. [Eu(III)]tot = 1 to 100 μmol/g, [U(VI)]tot = 10 μmol/g, pH = 7.01±0.10.")
![Lifetime of U(VI) on SiO2 surface at various total concentrations of U(VI) and Eu(III). [Eu(III)]tot = 2 to 160 μmol/g, [U(VI)]tot = 2 to 80 μ mol/g. [Eu(III)]tot/[U(VI)]tot = 1 or 2. pH = 7.15±0.23.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_521_image_206.jpg "Lifetime of U(VI) on SiO2 surface at various total concentrations of U(VI) and Eu(III). [Eu(III)]tot = 2 to 160 μmol/g, [U(VI)]tot = 2 to 80 μ mol/g. [Eu(III)]tot/[U(VI)]tot = 1 or 2. pH = 7.15±0.23.")
![Lifetime of Eu(III) on SiO2 surface at various total concentrations of U(VI) and Eu(III). [Eu(III)]tot=2 to 160 μmol/g, [U(VI)]tot = 2 to 80 μmol/g. [Eu(III)]tot/[U(VI)]tot = 1 or 2. pH = 7.15±0.23.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_522_image_207.jpg "Lifetime of Eu(III) on SiO2 surface at various total concentrations of U(VI) and Eu(III). [Eu(III)]tot=2 to 160 μmol/g, [U(VI)]tot = 2 to 80 μmol/g. [Eu(III)]tot/[U(VI)]tot = 1 or 2. pH = 7.15±0.23.")
![Adsorption ratio of Eu(III) or Cu(II) on a purified Ca-montmorillonite (PCa) at various reaction times. [Clay] = 1 gL-1, [NaClO4] = 1 mM, equivalent ratio of Eu(III) or Cu(II) to CEC = 1.0.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_535_image_209.jpg "Adsorption ratio of Eu(III) or Cu(II) on a purified Ca-montmorillonite (PCa) at various reaction times. [Clay] = 1 gL-1, [NaClO4] = 1 mM, equivalent ratio of Eu(III) or Cu(II) to CEC = 1.0.")
![Conditional adsorption constant of Eu(III) and Cu(II) on a purified clay mineral at various pH. [Eu(III)] = 0 or 0.25 and [Cu(II)] = 0.055 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_538_image_210.jpg "Conditional adsorption constant of Eu(III) and Cu(II) on a purified clay mineral at various pH. [Eu(III)] = 0 or 0.25 and [Cu(II)] = 0.055 mM.")
![Potentiometric titration of a clay mineral solution in presence or absence of Eu(III) or Cu(II). Equivalent ratio of [Eu(III)] or [Cu(II)] to CEC = 1.0.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_541_image_212.jpg "Potentiometric titration of a clay mineral solution in presence or absence of Eu(III) or Cu(II). Equivalent ratio of [Eu(III)] or [Cu(II)] to CEC = 1.0.")
![Adsorption ratio and constant of Eu(III) and Cu(II) on a purified bentonite (PBT) against added Eu(III) concentration in presence of [Cu(II)] = 0.533 mM and various [Eu](= 0 to 0.35 mM).](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_543_image_213.jpg "Adsorption ratio and constant of Eu(III) and Cu(II) on a purified bentonite (PBT) against added Eu(III) concentration in presence of [Cu(II)] = 0.533 mM and various [Eu](= 0 to 0.35 mM).")
![Adsorption ratio of Eu(III) and Cu(II) on a purified clay mineral against added Cu(II) concentration. [Eu(III)] = 0 or 0.275 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_544_image_214.jpg "Adsorption ratio of Eu(III) and Cu(II) on a purified clay mineral against added Cu(II) concentration. [Eu(III)] = 0 or 0.275 mM.")
![Conditional adsorption constant of Eu(III) and Cu(II) on a purified clay mineral against added Cu(II) concentration. [Eu(III)] = 0 or 0.275 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_545_image_215.jpg "Conditional adsorption constant of Eu(III) and Cu(II) on a purified clay mineral against added Cu(II) concentration. [Eu(III)] = 0 or 0.275 mM.")
![Adsorption ratio of Eu(III) and Cu(II) on a purified clay mineral against equivalent fraction of Eu(III). 3[Eu(III)] + 2[Cu(II)] = 0.825 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_547_image_216.jpg "Adsorption ratio of Eu(III) and Cu(II) on a purified clay mineral against equivalent fraction of Eu(III). 3[Eu(III)] + 2[Cu(II)] = 0.825 mM.")
![Conditional adsorption constant of Eu(III) and Cu(II) on a purified clay mineral against equivalent fraction of Eu(III). 3[Eu(III)] + 2[Cu(II)] = 0.825 mM.](https://nrms.kisti.re.kr/bitextimages/TRKO201300013521/TRKO201300013521_548_image_217.jpg "Conditional adsorption constant of Eu(III) and Cu(II) on a purified clay mineral against equivalent fraction of Eu(III). 3[Eu(III)] + 2[Cu(II)] = 0.825 mM.")
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| 주관연구기관 | 한국원자력연구원 Korea Atomic Energy Research Institute |
|---|---|
| 보고서유형 | 2단계보고서 |
| 발행국가 | 대한민국 |
| 언어 | 한국어 |
| 발행년월 | 2012-04 |
| 과제시작연도 | 2011 |
| 주관부처 | 교육과학기술부 Ministry of Education and Science Technology(MEST) |
| 등록번호 | TRKO201300013521 |
| 과제고유번호 | 1345151805 |
| 사업명 | 원자력기술개발 |
| DB 구축일자 | 2013-08-26 |
| 키워드 | 악티나이드 원소.레이저 분광학.화학종 규명.시간분해 레이저 형광 분광학.레이저 유도 파열 검출.콜로이드 나노입자.용해도.착물.Actinide elements.Laser spectroscopy.Chemical speciation.TRLFS.LIBD.colloidal nanoparticles.Solubility.Complex.LPAS. |
| DOI | https://doi.org/10.23000/TRKO201300013521 |
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