1
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Maree RM, Kotb NA, Abass MR. Efficient uptake of 85Sr and 60Co using fabricated inorganic sorbent for reducing radiation doses of simulated low-level waste. Appl Radiat Isot 2024; 208:111264. [PMID: 38531244 DOI: 10.1016/j.apradiso.2024.111264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/24/2024] [Accepted: 02/27/2024] [Indexed: 03/28/2024]
Abstract
The present study investigated the sorption behavior of 85Sr and 60Co radionuclides from aqueous solutions onto tin molybdate (SnMo) sorbent. SnMo has been synthesized using the precipitation method and was characterized using four analytical techniques including FT-IR, XRD, SEM, and XRF. The sorption studies applied on 85Sr and 60Co include the effect of shaking time, pH, concentration, and saturation capacity. The experimental data revealed that the sorption process was carried out after equilibrium time (180 min). The saturation capacity for 85Sr and 60Co is measured to be 58.1 and 52.2 mg g-1, respectively. The sorption behavior of studied radionuclides is dependent on pH values. Sorption kinetic better fit with the pseudo-second-order model. Furthermore, the sorption isotherm is better represented by the model proposed by Langmuir. The results of the desorption investigations indicated that the most effective eluents for achieving full recovery of investigated radionuclides were identified. Finally, the recycling results demonstrate the suitability of SnMo for affected sorbing of 85Sr and 60Co from aqueous solutions. All the obtained data clarify that the SnMo sorbent is an effective means of removing 85Sr and 60Co from liquid waste.
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Affiliation(s)
- R M Maree
- Radiation Protection & Safety Department, Hot Laboratories Centre, Egyptian Atomic Energy Authority, Egypt
| | - N A Kotb
- Radiation Protection & Safety Department, Hot Laboratories Centre, Egyptian Atomic Energy Authority, Egypt
| | - M R Abass
- Nuclear Fuel Technology Department, Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo, Egypt.
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2
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Guan Y, Guo Z, Chen W, Fan K, He H, Cui L, Huang C, He X, Xu Z, Zhang J, He Y, Wang H. Migration mechanisms of 90Sr and 137Cs on terraces. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2024; 275:107428. [PMID: 38547560 DOI: 10.1016/j.jenvrad.2024.107428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/20/2024] [Accepted: 03/22/2024] [Indexed: 04/26/2024]
Abstract
In order to investigate the impact of environmental conditions on the distribution and migration of 90Sr in the Longji terrace environment, the activity concentrations of 90Sr and 137Cs were determined. The activity concentration ranges of 90Sr and 137Cs in surface soil were 0.15-1.04 Bq/kg and 2.16-6.94 Bq/kg, respectively. These results showed that there was a similar trend between the activity concentration of 90Sr and 137Cs in the surface soil along the runoff path and their activity concentration were influenced by the slope of the terraced terrain. On the other hand, the activity ranges of 90Sr and 137Cs in soil cores were 0.01-2.74 Bq/kg and 0.43-7.19 Bq/kg, respectively. These results indicate that the migration mechanism of 90Sr is different from that of 137Cs. As compared with 137Cs, 90Sr is significantly influenced by the moisture content. In addition, high span of 137Cs/90Sr activity ratios were found in this study, which were attributed to the characteristics of cultivated land and frequent artificial disturbances that intensified the migration of 90Sr.
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Affiliation(s)
- Yongjing Guan
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China.
| | - Zichen Guo
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China; Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Guangxi, Nanning, 530222, China
| | - Wu Chen
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
| | - Kaidi Fan
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
| | - Hua He
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
| | - Liangjia Cui
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
| | - Chunping Huang
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
| | - Xianwen He
- Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Guangxi, Nanning, 530222, China
| | - Zeyue Xu
- Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Guangxi, Nanning, 530222, China
| | - Jiajia Zhang
- Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Guangxi, Nanning, 530222, China
| | - Ye He
- Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Guangxi, Nanning, 530222, China
| | - Huijuan Wang
- Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China.
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3
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Chen S, Wu L, Wu Z, Liu Z, Qiu Z, Chi L. Highly efficient removal of Sr 2+ from aqueous solutions using a polyacrylic acid/crown-ether/graphene oxide hydrogel composite. RSC Adv 2024; 14:7825-7835. [PMID: 38444965 PMCID: PMC10913416 DOI: 10.1039/d3ra08789a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 02/25/2024] [Indexed: 03/07/2024] Open
Abstract
With the development of nuclear power, efficiently treating nuclear wastes generated during operation has attracted extensive attention. Hydrogels are common adsorbent materials in the treatment of wastewater due to their high swelling rate and easy post-treatment. In this work, a novel polyacrylic acid/crown-ether/graphene oxide (PAA/DB18C6/GO) hydrogel composite was synthesized by a radical cross-linking copolymerization method and characterized using various analytical tools such as SEM, FT-IR, TGA and XPS. The effects of time, pH, initial Sr2+ concentration, and temperature on Sr2+ adsorption onto the PAA/DB18C6/GO were studied. The PAA/DB18C6/GO shows a high adsorption capacity of 379.35 mg g-1 at an initial Sr2+ concentration of 772 mg L-1 due to the unique structure of dibenzo-18-crown-ether-6 and high swelling. The composite has a high selectivity for Sr2+ with a removal rate of 82.4% when concentrations of Na+ and K+ were 10 times higher than that of Sr2+. The pH and temperature have no apparent impact on adsorption performance of the PAA/DB18C6/GO under the experimental conditions. The composite shows excellent reusability with more than 92% removal rate for Sr2+ after five continuous cycles. In addition, the mechanism of Sr2+ adsorption by PAA/DB18C6/GO was analyzed by fitting the adsorption data to the theoretical models and XPS data.
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Affiliation(s)
- Sheng Chen
- College of Chemistry, Fuzhou University Fuzhou Fujian 350108 China
- Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Lina Wu
- Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Zhicheng Wu
- Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Zhikun Liu
- Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Zhihua Qiu
- Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Lisheng Chi
- Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
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4
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Sundström J, Isaksson M, Rääf CL. LARCalc, a tool to estimate sex- and age-specific lifetime attributable risk in populations after nuclear power plant fallout. Sci Rep 2023; 13:21244. [PMID: 38040734 PMCID: PMC10692327 DOI: 10.1038/s41598-023-46964-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 11/07/2023] [Indexed: 12/03/2023] Open
Abstract
A tool called LARCalc, for calculating the radiological consequences of accidental large scale nuclear power plant releases based on estimates of 137Cs ground deposition, is presented. LARCalc is based on a previously developed models that has been further developed and packaged into an easy-to-use decision support tool for training of decision makers. The software visualises the radiological impact of accidental nuclear power plant releases and the effects of various protective measures. It is thus intended as a rapid alternative for planning protective measures in emergency preparedness management. The tool predicts projected cumulative effective dose, projected lifetime attributable cancer risk, and residual dose for some default accidental release scenarios. Furthermore, it can predict the residual dose and avertable cumulative lifetime attributable risk (LAR) resulting from various protective measures such as evacuation and decontamination. It can also be used to predict the avertable collective dose and the increase in cancer incidence within the specified population. This study presents the theoretical models and updates to the previous models, and examples of different nuclear fallout scenarios and subsequent protective actions to illustrate the potential use of LARCalc.
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Affiliation(s)
- Jonathan Sundström
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
| | - Mats Isaksson
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Christopher L Rääf
- Medical Radiation Physics, Department of Translational Medicine, Lund University, Malmö, Sweden
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5
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Tsukada H, Takeda A, Takahashi T, Fukutani S, Akashi M, Takahashi J, Uematsu S, Chyzhevskyi I, Kirieiev S, Kashparov V, Zheleznyak M. Transfer of 137Cs and 90Sr from soil-to-potato: Interpretation of the association from global fallout in Aomori to accidental release in Fukushima and Chornobyl. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165467. [PMID: 37454838 DOI: 10.1016/j.scitotenv.2023.165467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/03/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
Ceasium-137 and 90Sr are major artificial radionuclides that have been released into the environment. Soil-to-plant transfer of radionuclides is an important route to food contamination. The radionuclide activity concentrations in crops must be quantitatively predicted for estimating the internal radiation doses from food ingestion. In this study, soil and potato samples were collected from three study sites contaminated with different sources of 137Cs and 90Sr: Aomori Prefecture (global fallout) and two accidental release areas (Fukushima Prefecture and the Chornobyl exclusion zone). The 137Cs activity concentrations in the soil and potato samples widely ranged from 1.0 to 250,000 and from 0.048 to 200,000 Bq kg-1 dry weight, respectively. The soil-to-potato transfer factor of 137Cs also ranged widely (0.0015-1.1) and decreased with increasing concentration of exchangeable K. Meanwhile, the activity concentrations of 90Sr in the soil and potato samples were 0.50-64,000 and 0.027-18,000 Bq kg-1 dry weight respectively, and the soil-to-potato transfer factor of 90Sr was 0.023-0.74, decreasing with increasing concentration of exchangeable Ca. The specific activity ratios of 137Cs/Cs and 90Sr/Sr in the exchangeable fraction were similar to those in potatoes, with a factor of 3 in the ±95 % confidence intervals over six orders of magnitude and a factor of 2 in the ±95 % confidence intervals over five orders of magnitude, respectively. According to the data, the accuracy of predicting the activity concentrations of 137Cs and 90Sr in potatoes can be improved by applying the specific activity ratios of 137Cs/Cs and 90Sr/Sr in the exchangeable fraction. This approach accounts for variable factors such as the effects of K and Ca fertilization and soil characteristics. It also emphasizes the benefit of determining the stable Cs and Sr concentrations in potatoes and other crops prior to possible future contamination.
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Affiliation(s)
- Hirofumi Tsukada
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima-shi, Fukushima 960-1296, Japan.
| | - Akira Takeda
- Department of Radioecology, Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho, Kamikita, Aomori 039-3212, Japan
| | - Tomoyuki Takahashi
- Institute for Integrated Radiation Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - Satoshi Fukutani
- Institute for Integrated Radiation Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - Makoto Akashi
- Tokyo Healthcare University, 2-5-1 Higashigaoka, Meguro-ku, Tokyo 152-8558, Japan
| | - Junko Takahashi
- Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan
| | - Shinichiro Uematsu
- Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan
| | - Ihor Chyzhevskyi
- State Specialized Enterprise "Ecocentre" of the State Agency of Ukraine on Exclusion Zone Management, 6, Shkilna Str., Chornobyl, Kyiv Region 07270, Ukraine
| | - Serhii Kirieiev
- State Specialized Enterprise "Ecocentre" of the State Agency of Ukraine on Exclusion Zone Management, 6, Shkilna Str., Chornobyl, Kyiv Region 07270, Ukraine
| | - Valery Kashparov
- Ukrainian Institute of Agricultural Radiology of the National University of Life and Environmental Sciences of Ukraine, Mashinobudivnykiv str. 7, Chabany, Kyiv Region 08162, Ukraine
| | - Mark Zheleznyak
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima-shi, Fukushima 960-1296, Japan
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6
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Kavasi N, Arae H, Aono T, Sahoo SK. Distribution of strontium-90 in soils affected by Fukushima dai-ichi nuclear power station accident in the context of cesium-137 contamination. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 326:121487. [PMID: 36958665 DOI: 10.1016/j.envpol.2023.121487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/04/2023] [Accepted: 03/21/2023] [Indexed: 06/18/2023]
Abstract
90Sr and 137Cs activity concentrations were determined by radiometric methods in 76 soil samples (soil, litter, rain gutter deposit, and roadside sediment samples) affected by the Fukushima Dai-ichi Nuclear Power Station (FDNPS) accident and collected from the Fukushima exclusion zone. The 90Sr and 137Cs activity concentrations were in the range of 3 to 1050 Bq kg-1 (median 82 Bq·kg-1) and 0.7 to 6770 kBq·kg-1 (median 890 kBq·kg-1), respectively (decay correction date: March 15, 2011). A strong positive correlation was found between 90Sr and 137Cs activity concentration and higher mobility of 90Sr was confirmed in Japanese soil samples. The activity ratio of 90Sr/137Cs in 85% of all samples was in the range of 5.0 × 10-5 to 5.0 × 10-4 with a median of 1.2 × 10-4. From the activity ratio values it was concluded that the 90Sr released to the atmosphere was only around 0.0003-0.02 PBq which is negligible compared to the Chernobyl accident (∼10 PBq) or other nuclear accident contaminations. From the standpoints of radioecology and radiation safety, 137Cs remains the primary pollutant of the FDNPS accident.
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Affiliation(s)
- Norbert Kavasi
- Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, National Institutes for Quantum Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Laboratory for Radiochemistry, Department of Environmental Sciences, Jožef Stefan Institute, 39 Jamova, Ljubljana, 1000, Slovenia
| | - Hideki Arae
- Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, National Institutes for Quantum Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Tatsuo Aono
- Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, National Institutes for Quantum Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Sarata Kumar Sahoo
- Department of Radioecology and Fukushima Project, National Institute of Radiological Sciences, National Institutes for Quantum Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan.
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7
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Savina MR, Isselhardt BH, Shulaker DZ, Robel M, Conant AJ, Ade BJ. Simultaneous isotopic analysis of fission product Sr, Mo, and Ru in spent nuclear fuel particles by resonance ionization mass spectrometry. Sci Rep 2023; 13:5193. [PMID: 36997559 PMCID: PMC10063544 DOI: 10.1038/s41598-023-32203-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 03/23/2023] [Indexed: 04/03/2023] Open
Abstract
Fission product Sr, Mo, and Ru isotopes in six 10-μm particles of spent fuel from a pressurized water reactor were analyzed by resonance ionization mass spectrometry (RIMS) and evaluated for utility in nuclear material characterization. Previous measurements on these same samples showed widely varying U, Pu, and Am isotopic compositions owing to the samples' differing irradiation environments within the reactor. This is also seen in Mo and Ru isotopes, which have the added complication of exsolution from the UO2 fuel matrix. This variability is a hindrance to interpreting data from a collection of particles with incomplete provenance since it is not always possible to assign particles to the same batch of fuel based on isotopic analyses alone. In contrast, the measured 90Sr/88Sr ratios were indistinguishable across all samples. Strontium isotopic analysis can therefore be used to connect samples with otherwise disparate isotopic compositions, allowing them to be grouped appropriately for interpretation. Strontium isotopic analysis also provides a robust chronometer for determining the time since fuel irradiation. Because of the very high sensitivity of RIMS, only a small fraction of material in each of the 10 μm samples was consumed, leaving the vast majority still available for other analyses.
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Affiliation(s)
- Michael R Savina
- Lawrence Livermore National Laboratory, Nuclear and Chemical Sciences Division, Livermore, CA, USA.
| | - Brett H Isselhardt
- Lawrence Livermore National Laboratory, Nuclear and Chemical Sciences Division, Livermore, CA, USA
| | - Danielle Z Shulaker
- Lawrence Livermore National Laboratory, Nuclear and Chemical Sciences Division, Livermore, CA, USA
| | - Martin Robel
- Lawrence Livermore National Laboratory, Nuclear and Chemical Sciences Division, Livermore, CA, USA
| | - Andrew J Conant
- Oak Ridge National Laboratory, Material Security and Counterproliferation, Nuclear Nonproliferation Division, Oak Ridge, TN, USA
| | - Brian J Ade
- Oak Ridge National Laboratory, Research and Test Reactor Physics Group, Nuclear Energy and Fuel Cycle Division, Oak Ridge, TN, USA
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8
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Aoki J, Wakaki S, Ishiniwa H, Kawakami T, Miyazaki T, Suzuki K, Takagai Y. Direct Quantification of Attogram Levels of Strontium-90 in Microscale Biosamples Using Isotope Dilution-Thermal Ionization Mass Spectrometry Assisted by Quadrupole Energy Filtering. Anal Chem 2023; 95:4932-4939. [PMID: 36906855 DOI: 10.1021/acs.analchem.2c04844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
Abstract
Although thermal ionization mass spectrometry (TIMS) has been employed for the high-precision analysis of isotope ratios, direct quantification of artificial mono-nuclide in the environment is difficult by even using isotope dilution (ID) due to the coexistence of the great magnitude of natural stable nuclides or isobars. In traditional TIMS and ID-TIMS, a sufficient amount of stable Sr doped on a filament is required to realize a stable and adequate ion-beam intensity (i.e., thermally ionized beams). However, the background noise (BGN) at m/z 90, detected by an electron multiplier, disturbs 90Sr analysis at low concentration levels due to peak tailing of a significant 88Sr ion beam dependent on the 88Sr-doping amount. Here, TIMS assisted by quadruple energy filtering was successfully employed for the direct quantification of attogram levels of an artificial monoisotopic radionuclide strontium-90 (90Sr) in microscale biosamples. Direct quantification was achieved by integrating the ID quantification of natural Sr and simultaneous 90Sr/86Sr isotope ratio analysis. Additionally, the measurement amount calculated by the combination of the ID and intercalibration was corrected for the net result amount of 90Sr by subtracting dark noise and the detected amount derived from the survived 88Sr, which are equivalent with the BGN intensity at m/z 90. Background correction revealed that the detection limits were in the range of 6.15 × 10-2-3.90 × 10-1 ag (0.31-1.95 μBq), depending on the concentration of natural Sr in a 1 μL sample, and the quantification of 0.98 ag (5.0 μBq) of 90Sr in 0-300 mg/L of natural Sr was successful. This method could analyze small sample quantities (1 μL), and the quantitative results were verified against authorized radiometric analysis techniques. Furthermore, the amount of 90Sr in actual teeth was successfully quantified. This method will be a powerful tool for measuring 90Sr in the measurement of micro-samples, which are required to assess and understand the degree of internal radiation exposure.
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Affiliation(s)
- Jo Aoki
- Faculty of Symbiotic Systems Science, Cluster of Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan
| | - Shigeyuki Wakaki
- Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 200 Monobe Otsu, Nankoku, Kochi 783-8502, Japan
| | - Hiroko Ishiniwa
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima 960-1296 Japan
| | | | - Takashi Miyazaki
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natushima, Yokosuka, Kanagawa 237-0061, Japan
| | - Katsuhiko Suzuki
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natushima, Yokosuka, Kanagawa 237-0061, Japan
| | - Yoshitaka Takagai
- Faculty of Symbiotic Systems Science, Cluster of Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima 960-1296 Japan
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9
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Skoko B, Kovačić M, Lazarus M, Sekovanić A, Kovačić J, Sergiel A, Zwijacz-Kozica T, Reljić S, Petrinec B, Selva N, Huber Đ. 90Sr and stable element levels in bones of brown bears: long-term trends in bear populations from Croatia and Poland. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:32507-32522. [PMID: 36460888 DOI: 10.1007/s11356-022-24397-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
The aim of this study was to investigate the temporal trends and geographical differences in 90Sr and stable element (Ba, Ca, Mn, Sr, Pb, Zn) levels in the bones of Croatian and Polish brown bear (Ursus arctos) populations. Experimental data suggest that in the decades after nuclear weapon tests and the Chernobyl accident, 90Sr bone activity concentrations decreased from 352 to 11 Bq kg-1 in the Croatian bear population (period 1982-2015) and from 831 to 27 Bq kg-1 in Polish bears (period 1962-2020). Calculated effective and ecological half-lives were 9 and 13 years for Croatian bears, and 15 and 31 years for Polish bears, respectively. Different temporal trends were noted in levels of Ba, Mn, Pb and Zn between the two countries with majority of bones having lower Pb, Sr and Zn in Croatian than in Polish bears. Estimated values for the soil-to-bear transfer of 90Sr were the same order of magnitude in the studied populations. Contrary to this, the estimated transfer of stable Sr was an order of magnitude lower for the Croatian bear population compared to Polish bears. The observed differences in soil-to-bear transfer between stable Sr and 90Sr found for Croatian bears might suggest the need for careful consideration on the use of stable Sr data as an analogue for 90Sr. To our knowledge, this is the first study that analysed 90Sr activity in tissue of brown bears. As such, it provides insight into the fate and behaviour of one of the most relevant anthropogenic radionuclides at the top of the food chain.
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Affiliation(s)
- Božena Skoko
- Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000, Zagreb, Croatia
| | - Milica Kovačić
- Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000, Zagreb, Croatia
| | - Maja Lazarus
- Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000, Zagreb, Croatia.
| | - Ankica Sekovanić
- Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000, Zagreb, Croatia
| | - Jelena Kovačić
- Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000, Zagreb, Croatia
| | - Agnieszka Sergiel
- Institute of Nature Conservation, Polish Academy of Sciences, Aleja Adama Mickiewicza 33, 31-120, Kraków, Poland
| | | | - Slaven Reljić
- Faculty of Veterinary Medicine, Heinzelova Ulica 55, 10000, Zagreb, Croatia
| | - Branko Petrinec
- Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000, Zagreb, Croatia
| | - Nuria Selva
- Institute of Nature Conservation, Polish Academy of Sciences, Aleja Adama Mickiewicza 33, 31-120, Kraków, Poland
| | - Đuro Huber
- Institute of Nature Conservation, Polish Academy of Sciences, Aleja Adama Mickiewicza 33, 31-120, Kraków, Poland
- Faculty of Veterinary Medicine, Heinzelova Ulica 55, 10000, Zagreb, Croatia
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10
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Wu L, Wang H, Kong X, Wei H, Chen S, Chi L. High strontium adsorption performance of layered zirconium phosphate intercalated with a crown ether. RSC Adv 2023; 13:6346-6355. [PMID: 36824231 PMCID: PMC9942561 DOI: 10.1039/d2ra07757d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 02/15/2023] [Indexed: 02/23/2023] Open
Abstract
Effective removal of strontium isotopes in radioactive waste streams has important implications for the environment and the sustainable development of nuclear energy. In this work, a zirconium phosphate/18-crown-ether-6 (ZrP/18C6) composite was prepared using the intercalation method by loading crown ether into zirconium phosphate. The composite was structurally and morphologically characterized by XRD, FT-IR, XPS, and SEM. The adsorption experiments of Sr2+ onto the ZrP/18C6 composite were conducted as a function of temperature, pH, Sr2+ concentration and competing ions. The results indicate ZrP/18C6 can adsorb 98.6% of Sr2+ within 30 minutes at an Sr2+ concentration of 100 mg L-1 and maintain a high removal rate with a distribution coefficient of 7 × 105 mL g-1 when Sr2+ is at a low level of 4.28 mg L-1. The ZrP/18C6 composite reached a maximum adsorption capacity of 195.74 mg g-1 at an Sr2+ concentration of 380 mg L-1, which is significantly higher than the 43.03 mg g-1 of α-ZrP. The adsorption performance of Sr2+ onto ZrP/18C6 is not significantly affected by temperature, pH and competing ions. Furthermore, the adsorption kinetics and thermodynamics were analyzed based on the adsorption data obtained in the present work. It is shown that the adsorption of Sr2+ onto ZrP/18C6 follows the pseudo-second-order model and the Langmuir monolayer model, respectively. Additionally, the adsorption mechanism of Sr2+ by ZrP/18C6 is discussed.
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Affiliation(s)
- Lina Wu
- College of Chemistry, Fuzhou University Fuzhou Fujian 350108 China.,Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350116 China.,Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Huiping Wang
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350116 China.,Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Xiangqian Kong
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350116 China.,Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Haibo Wei
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350116 China.,Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Sheng Chen
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350116 China.,Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
| | - Lisheng Chi
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350116 China.,Fujian Key Laboratory of Fuel and Materials in Clean Nuclear Energy System, Fujian Institute of Research on the Structure of Matter, CAS Fuzhou Fujian 350002 China
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11
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Chen X, Zhong N, Luo Y, Ni Y, Liu Z, Wu G, Zheng T, Dang Y, Chen H, Li W. Effects of strontium on the morphological and photosynthetic physiological characteristics of Vicia faba seedlings. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 25:811-821. [PMID: 35961092 DOI: 10.1080/15226514.2022.2110037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The adaptation of plants to strontium (Sr) stress requires a more systematic understanding. In the present study, the morphological and photosynthetic physiological characteristics of Vicia faba seedlings under Sr stress (88Sr, 0-1,000 mg·L-1) were analyzed in solution culture. The results showed that Sr treatment decreased the biomass and root activity of V. faba seedlings significantly, but fortunately, there was almost no root necrosis. In plant morphology, the taproot length, lateral root number, plant height, branching number and internodes number of V. faba were significantly inhibited, thus the apical dominance of taproot and terminal bud was more obvious. The accumulation of Sr resulted in the decrease of leaf area, dry weight, stomatal density and stomatal aperture, while the guard cell length increased, and the specific leaf weight (SLW) increased first and then decreased. These changes in stomatal morphology may be a positive regulation to reduce water loss. In addition, V. faba increased the non-photochemical quenching (NPQ) and the activities of peroxidase (POD) and ascorbate peroxidase (APX) to protect the photosynthetic structure. Low concentration of Sr (250 mg·L-1) promoted the photochemical efficiency and electron transfer of PSII (e.g., increased Fv/Fm, ΦPSII, qP and ETR). However, Sr (250-1,000 mg·L-1) inhibited the net photosynthetic rate (Pn), transpiration rate (Tr) and stomatal conductance (Gs) in leaves. In general, the Pn was affected by both stomatal and non-stomatal factors. Since Sr did not cause significant damage to the PSII function, the non-stomatal factor may be the dark reaction in photosynthesis affected, but this needs to be proved by further studies.
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Affiliation(s)
- Xi Chen
- Life Science College, Sichuan Normal University, Chengdu, China
| | - Ningying Zhong
- Life Science College, Sichuan Normal University, Chengdu, China
| | - Yayun Luo
- Life Science College, Sichuan Normal University, Chengdu, China
| | - Yinfeng Ni
- Life Science College, Sichuan Normal University, Chengdu, China
| | - Ziyi Liu
- Life Science College, Sichuan Normal University, Chengdu, China
| | - Guo Wu
- Life Science College, Sichuan Normal University, Chengdu, China
- Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, China
| | - Ting Zheng
- Life Science College, Sichuan Normal University, Chengdu, China
- Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, China
| | - Yuxi Dang
- Life Science College, Sichuan Normal University, Chengdu, China
| | - Huiling Chen
- Life Science College, Sichuan Normal University, Chengdu, China
| | - Wei Li
- Life Science College, Sichuan Normal University, Chengdu, China
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12
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Zhou Z, Ren H, Zhou L, Wang P, Lou X, Zou H, Cao Y. Recent Development on Determination of Low-Level 90Sr in Environmental and Biological Samples: A Review. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010090. [PMID: 36615288 PMCID: PMC9821828 DOI: 10.3390/molecules28010090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
In the context of the rapid development of the world's nuclear power industry, it is vital to establish reliable and efficient radioanalytical methods to support sound environment and food radioactivity monitoring programs and a cost-effective waste management strategy. As one of the most import fission products generated during human nuclear activities, 90Sr has been widely determined based on different analytical techniques for routine radioactivity monitoring, emergency preparedness and radioactive waste management. Herein, we summarize and critically review analytical methods developed over the last few decades for the determination of 90Sr in environmental and biological samples. Approaches applied in different steps of the analysis including sample preparation, chemical separation and detection are systematically discussed. The recent development of modern materials for 90Sr concentration and advanced instruments for rapid 90Sr measurement are also addressed.
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Affiliation(s)
| | | | | | | | | | | | - Yiyao Cao
- Correspondence: ; Tel.: +86-(0571)-87115089
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13
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Cheng X, Chen C, Hu Y, Guo X, Wang J. Photosynthesis and growth of Amaranthus tricolor under strontium stress. CHEMOSPHERE 2022; 308:136234. [PMID: 36041533 DOI: 10.1016/j.chemosphere.2022.136234] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/22/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Amaranthaceae are effective plants for cleaning soil contaminated by heavy metals and radionuclides. In this paper, Amaranthus tricolor was used to investigate the response of the plant photosynthesis to various concentration of strontium ions (0.2, 0.6, 3 and 6 mM), in order to determine the possibility of A. tricolor to remediate strontium contamination. The results showed that strontium ions (0.2-6 mM) had effect on light energy conversion and utilization in A. tricolor. Low level of strontium (0.2 mM) promoted the energy utilization in A. tricolor, while higher Sr concentration (3 mM or higher) increased the excess light energy in the plants. Under strontium stress of 6 mM, the acceptor side of PSII in A. tricolor leaves was more vulnerable to strontium stress than the donor side. Furthermore, strontium stress led to accumulation of QA- and block in QB downstream of the electron transfer chain in PSII of A. tricolor leaves. The tolerance ability of A. tricolor to strontium and remediation is also reflected in its biomass and strontium content in plants. Strontium at 3 mM or below promoted the growth of A. tricolor, while higher concentration inhibited the plant growth, but without obvious wilting or curling of leaves. The maximal dry weight increased by 36.29% in shoots, and 60.14% in roots when the spiked-strontium concentration reached 0.2 mM. The maximal strontium content achieved 8.75 mg/g dry wt in shoots, and 1.71 mg/g dry wt in roots respectively, when strontium concentration was 6 mM. Transfer factors (TFs: ratio of Sr content in shoots to that in roots) of strontium in A. tricolor ranged from 2.85 to 5.93, while bio-concentration factors (BCFs: ratio of Sr content in shoots to that in solutions) ranged from 22.57 to 49.66. In summary, A. tricolor showed the excellent potential to remediate strontium contamination.
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Affiliation(s)
- Xuening Cheng
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China
| | - Can Chen
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing, 100084, PR China
| | - Yuming Hu
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China
| | - Xiliang Guo
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China; China Institute for Radiation Protection, Taiyuan, 030006, Shanxi, China
| | - Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing, 100084, PR China.
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14
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Ostolska I, Biedrzycka A. Nanostructure of humic acid adsorption layer in the presence of Cs and Sr ions on the surface of waste material obtained from residue after supercritical extraction of hops. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02655-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
AbstractAdsorption of ionic molecules at the solid–liquid interface depends on various interactions, particles surface properties as well as the presence of the additional substance in the analyzed systems. The waste material obtained from the supercritical fluid extraction process was used as an adsorbent. The plant-based biosorbent structure was fully characterized. Then the humic acid (constituting the common interfering substance found in the environmental samples) sorption on the hop cones was investigated in the absence and presence of Sr/Cs ions under various pH conditions. Hence, the metal cation valence can influence the interactions between the colloidal system constituents and the adsorption layer structure. Determining the mutual interactions in the complex systems is important due to the potential possibility of using the waste sorbent to remove the radioactive Cs and Sr isotopes from the aquatic environment. Due to the lack of a porous structure of the sorbent and the high surface density of the charge, the metal ions are bound directly on the particles surface. The humic acid (HA) adsorption is greatly pH dependent—the largest removal was achieved under the acidic conditions (Qads = 88.69 mg/g), while the HA sorption process at pH 9 is impeded by a large negative charge deposited at the solid–liquid interface (Qads = 7.06 mg/g). At pH 3, formation of multilayer adsorption structure contributes to the effective removal of organic impurities. The metal ions valence significantly affects the humic acid binding mechanism. Divalent Sr acts like a “bridge” increasing the number of biosorbent active sites (at pH = 3 the HA adsorption increases almost twofold from 88.69 to 156.46 mg/g in the Sr ions), whereas the Cs+ ions leads to the reduction in the HA removal efficiency (Qads. = 46.31 mg/g under the same conditions).
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15
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Tsukada H, Takahashi T, Fukutani S. ACTIVITY CONCENTRATIONS OF RADIOCAESIUM, 90SR AND 129I IN AGRICULTURAL CROPS COLLECTED FROM FUKUSHIMA AND REFERENCE AREAS IN JAPAN, AND INTERNAL RADIATION DOSES. RADIATION PROTECTION DOSIMETRY 2022; 198:1104-1108. [PMID: 36083763 DOI: 10.1093/rpd/ncac066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 06/15/2023]
Abstract
Significant quantities of radionuclides were released into the environment due to the 2011 TEPCO's FDNPS accident. Radiocaesium is the most important radionuclide for assessment of radiation dose, and small amounts of 90Sr and very long-lived radionuclide of 129I were also released into the environment. Spinach, potato and brown rice were collected from Fukushima, neighboring prefectures and reference areas of negligible deposition in 2018 and 2019. The activity concentration of 137Cs in crops in Hamadori (coastal side) was relatively higher than other areas. The activity concentration of 90Sr in the crops showed a similar range among four areas in Fukushima, and they were similar level of those collected throughout Japan. The activity concentration of 129I in the crops collected from Hamadori was higher than other Fukushima areas. However, the activity ratio of 129I/137Cs was lower by five to seven orders of magnitude. Internal radiation doses of radiocaesium for adult males from ingestion of local crops collected from Hamadori were 0.0046 mSv, and that of 129I were 0.00000045 mSv in 2019.
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Affiliation(s)
- H Tsukada
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima-shi, Fukushima 960-1296, Japan
| | - T Takahashi
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - S Fukutani
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
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16
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Wang KY, Nedelec P, Clark H, Harris N, Kajino M, Igarashi Y. Impacts on air dose rates after the Fukushima accident over the North Pacific from 19 March 2011 to 2 September 2015. PLoS One 2022; 17:e0272937. [PMID: 36001589 PMCID: PMC9401177 DOI: 10.1371/journal.pone.0272937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/29/2022] [Indexed: 11/19/2022] Open
Abstract
A fleet of thirteen in-service global container ships continuously measured the air dose rates over the North Pacific after the Fukushima Daiichi Nuclear Power Station (FDNPS) accident. The results showed that the elevated air dose rates over the Port of Tokyo and the FDNPS emissions are significantly correlated (log(emission fluxes) = 54.98 x (air dose rates) (R = 0.95, P-value<0.01), and they are also significantly correlated with the Tsukuba deposition fluxes (log(deposition fluxes) = 0.47 + 30.98 (air dose rates) (R = 0.91, P-value<0.01). These results demonstrate the direct impact of the FDNPS emissions on the depositions of radionuclides and the air dose rates over the Port of Tokyo. Over the North Pacific, the correlation equations are log(emission fluxes) = -2.72 + 202.36 x (air dose rates over the northwestern Pacific) (R = 0.40, P-value<0.01), and log(emission fluxes) = -0.55 + 80.19 x (air dose rates over the northeastern Pacific) (R = 0.29, P-value = 0.0424). These results indicate that the resuspension of the deposited radionuclides have become a dominant source in the transport of radionuclides across the North Pacific. Model simulations show underestimated air dose rates during the periods of 22-25 March 2011 and 27-30 March 2011 indicating the lack of mechanisms, such as the resuspension of radionuclides, in the model.
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Affiliation(s)
- Kuo-Ying Wang
- Department of Atmospheric Sciences, National Central University, Chung-Li, Taiwan
- * E-mail:
| | - Philippe Nedelec
- Laboratoire d’Aérologie, Centre National de la Recherche Scientifique, Observatoire Midi-Pyrénées, Toulouse, France
| | | | - Neil Harris
- Centre for Environment and Agricultural Informatics, Cranfield University, Cranfield, United Kingdom
| | - Mizuo Kajino
- Meteorological Research Institute (MRI), Japan Meteorological Agency (JMA), Tsukuba, Ibaraki, Japan
| | - Yasuhito Igarashi
- Division of Nuclear Engineering Science, Institute for Integrated Radiation and Nuclear Science, Kyoto University (KURNS), Osaka, Japan
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17
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Honda M, Martschini M, Marchhart O, Priller A, Steier P, Golser R, Sato TK, Kazuaki T, Sakaguch A. Novel 90Sr analysis of environmental samples by Ion-Laser InterAction Mass Spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2732-2738. [PMID: 35789229 DOI: 10.1039/d2ay00604a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The sensitive analysis of 90Sr with accelerator mass spectrometry (AMS) was developed to advance environmental radiology. One advantage of AMS is the ability to analyze environmental samples with 90Sr/88Sr atomic ratios of 10-14 in following a simple chemical separation. Three different IAEA samples with known 90Sr concentrations (moss-soil, animal bone, Syrian soil: 1 g each) were analyzed to assess the validity of the chemical separation and the AMS measurement. The 90Sr measurements were conducted on the AMS system VERA combined with the Ion Laser InterAction Mass Spectrometry (ILIAMS) setup at the University of Vienna, which has excellent isobaric separation performance. The isobaric interference of 90Zr in the 90Sr AMS was first largely removed by chemical separation. The separation factor of Zr in two-step column chromatography with Sr resin and anion exchange resin was 106. The 90Zr remaining in the sample was effectively suppressed by ILIAMS. This procedure achieved a limit of detection <0.1 mBq in the 90Sr AMS, which is lower than typical β-ray detection. The agreement between AMS measurements and nominal values for the 90Sr concentrations of IAEA samples indicated that the new highly-sensitive 90Sr analysis in the environmental samples with AMS is reliable.
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Affiliation(s)
- Maki Honda
- Faculty of Physics, Isotope Physics, University of Vienna, Währinger Strasse 17, Vienna 1090, Austria.
- Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan
| | - Martin Martschini
- Faculty of Physics, Isotope Physics, University of Vienna, Währinger Strasse 17, Vienna 1090, Austria.
| | - Oscar Marchhart
- Faculty of Physics, Isotope Physics, University of Vienna, Währinger Strasse 17, Vienna 1090, Austria.
| | - Alfred Priller
- Faculty of Physics, Isotope Physics, University of Vienna, Währinger Strasse 17, Vienna 1090, Austria.
| | - Peter Steier
- Faculty of Physics, Isotope Physics, University of Vienna, Währinger Strasse 17, Vienna 1090, Austria.
| | - Robin Golser
- Faculty of Physics, Isotope Physics, University of Vienna, Währinger Strasse 17, Vienna 1090, Austria.
| | - Tetsuya K Sato
- Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan
| | - Tsukada Kazuaki
- Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan
| | - Aya Sakaguch
- Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
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18
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Wu J, Zheng X, Chen J, Yang G, Zheng J, Aono T. Distributions and impacts of plutonium in the environment originating from the Fukushima Daiichi Nuclear Power Plant accident: An overview of a decade of studies. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2022; 248:106884. [PMID: 35398758 DOI: 10.1016/j.jenvrad.2022.106884] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/27/2022] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
This paper reviews the current knowledge on plutonium (Pu) isotopic composition (the atom or activity ratios) and activity concentrations of 238Pu, 239Pu, 240Pu, and 241Pu resulting from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in 2011. In this critical review, we document the characteristic values of Pu atom or activity ratios (fingerprints) and present their spatial distributions around the FDNPP site. Based on multiple Pu fingerprints (238Pu/239+240Pu activity ratio, 240Pu/239Pu atom ratio, and 241Pu/239Pu atom ratio), we clarify that Pu contamination from the FDNPP accident occurred in a restricted terrestrial area, while Pu in the Northwest Pacific Ocean is still predominately sourced from the Pacific Proving Grounds (PPG) and global fallout. Using a simple two end-member mixing model, we calculate average contributions of Pu from the FDNPP accident of 13 ± 20% (n = 180) in soil samples, 55 ± 32% (n = 38) in leaf litter samples, and 67 ± 26% (n = 129) in air dust/black substances. In the marine environment, the PPG source average contributions are 45 ± 15% (n = 76) in seawater and 42 ± 12% (n = 48) in sediments. The spatial distributions of Pu atom or activity ratios based on existing studies suggest that: 1) in the terrestrial region investigated 80 km northwest of the FDNPP site, the Pu contamination is mainly observed in an area within a 50 km distance, and 2) in the terrestrial region investigated 60 km southwest of the FDNPP site, the Pu contamination is mainly observed in an area within a 30 km distance. Studies of Cs-bearing radioactive particles indicate that Pu occurs as Pu oxide, and the fuel fragments containing Pu that were released from the reactors to the surrounding environment are associated with micron-scale Cs-bearing radioactive particles. We note that the fractionation between Pu and other radionuclides occurred after release. These new findings about the Pu fingerprints around the FDNPP site will help researchers to establish a reference background database for future environmental risk assessment and geochemical study there.
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Affiliation(s)
- Junwen Wu
- Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention & Institute of Marine Sciences, Shantou University, Shantou, 515063, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China
| | - Xuemin Zheng
- Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention & Institute of Marine Sciences, Shantou University, Shantou, 515063, China
| | - Jisheng Chen
- Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention & Institute of Marine Sciences, Shantou University, Shantou, 515063, China
| | - Guosheng Yang
- National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage, Chiba, 263-8555, Japan
| | - Jian Zheng
- National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage, Chiba, 263-8555, Japan.
| | - Tatsuo Aono
- National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage, Chiba, 263-8555, Japan
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19
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Yang HM, Jeon H, Lee Y, Choi M. Sulfur-modified zeolite A as a low-cost strontium remover with improved selectivity for radioactive strontium. CHEMOSPHERE 2022; 299:134309. [PMID: 35339528 DOI: 10.1016/j.chemosphere.2022.134309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
Selective removal of radioactive strontium (90Sr) from the environment is important, and selective adsorption/ion exchange is appropriate for removal of trace amounts of 90Sr from large volumes of 90Sr-contaminated water. Although various inorganic ion-exchange materials, including zeolites, have been investigated intensively for removal of Sr2+ due to their excellent resistance to radiation and high ion-exchange capacity, their ion-exchange selectivity for Sr2+ is poor in the presence of competing ions such as Ca2+ and Mg2+. Here, sulfur-modified NaA zeolite (S-NaA) was prepared for low-cost, selective 90Sr removal because the elemental sulfur encapsulated in micropores provides additional Lewis acid-base interactions with Sr2+ during the Sr2+ ion-exchange. Our ion-exchange experiments revealed that S-NaA with 3 wt% sulfur (3 S-NaA) showed the highest Sr2+ selectivity among various S-NaAs containing up to 10 wt% sulfur because ion exchange involving bulky hydrated Sr2+ depends on the reduced micropore volume of S-NaA after sulfur loading. Most importantly, 3 S-NaA effectively and efficiently (>99.4%) removed 90Sr from groundwater containing 8.4 ppt 90Sr, demonstrating its excellent potential for practical application in the treatment of 90Sr-contaminated water.
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Affiliation(s)
- Hee-Man Yang
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedukdaero, Yuseong, Daejeon, 34057, Republic of Korea; Quantum Energy Chemical Engineering, University of Science and Technology (UST), 217, Gajeong-ro, Daejeon, 34113, Republic of Korea.
| | - Hyungmin Jeon
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Yeonsoo Lee
- Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedukdaero, Yuseong, Daejeon, 34057, Republic of Korea
| | - Minkee Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
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20
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Novikau R, Lujaniene G. Adsorption behaviour of pollutants: Heavy metals, radionuclides, organic pollutants, on clays and their minerals (raw, modified and treated): A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 309:114685. [PMID: 35151139 DOI: 10.1016/j.jenvman.2022.114685] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 01/06/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
The increasing anthropogenic pressure results in environmental pollution and thus adversely affects the integrity of ecosystems. Consequently, various methods of removing pollutants from effluents have been developed and used to minimise this negative impact, with adsorption on clay minerals identified as the most promising approach. This review examines the adsorption of heavy metals, radionuclides, and organic pollutants on clays/clay minerals and their composites under diverse conditions and deals with the applications of these materials in the construction of engineering barriers for waste management. Additionally, we discuss the efficiency and mechanisms of pollutant adsorption on clays subjected to various treatments and modifications while describing the beneficial effects of such modification/treatment on adsorption performance, reusability, and in vivo/in vitro toxicity.
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Affiliation(s)
- Raman Novikau
- Department of Environmental Research, State Research Institute Center for Physical Sciences and Technology, Savanoriu Ave. 231, Vilnius, 02300, Lithuania.
| | - Galina Lujaniene
- Department of Environmental Research, State Research Institute Center for Physical Sciences and Technology, Savanoriu Ave. 231, Vilnius, 02300, Lithuania.
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21
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A part per trillion isotope ratio analysis of 90Sr/ 88Sr using energy-filtered thermal ionization mass spectrometry. Sci Rep 2022; 12:1151. [PMID: 35064171 PMCID: PMC8783016 DOI: 10.1038/s41598-022-05048-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 01/06/2022] [Indexed: 11/28/2022] Open
Abstract
Strontium-90 is a major radioactive nuclide released by nuclear accidents and discharge waste. Input of such radioactive nuclide into earth surface environment causes potential threat of long-term internal exposure when taken up by organism. Rapid and precise measurement of 90Sr in variety of environmental sample is important to understand the distribution and dynamics of 90Sr in the local environment after the accident and to assess the effect of radioactive nuclide inputs on bodies. However, previous 90Sr measurement techniques have drawbacks such as long measurement times for radiometry and high detection limits for mass spectrometry. Here we present a technique to accurately measure a significantly small amount of 90Sr in natural environmental samples using an energy-filtered thermal ionization mass spectrometry. Our technique achieved a 90Sr detection limit of 0.23 ag, which corresponds to a 90Sr activity of 1.2 µBq. The detection limit was lowered by two orders of magnitude compared with the previous mass spectrometric 90Sr analyses. The ability of our technique will expand the applicability of mass spectrometric 90Sr survey not only to the rapid 90Sr survey upon nuclear accidents but also to study a long-term environmental diffusion of radioactive materials using size-limited environmental and biological samples.
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22
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Fuller N, Smith JT, Takase T, Ford AT, Wada T. Radiocaesium accumulation and fluctuating asymmetry in the Japanese mitten crab, Eriocheir japonica, along a gradient of radionuclide contamination at Fukushima. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118479. [PMID: 34752791 DOI: 10.1016/j.envpol.2021.118479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 10/29/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
The 2011 Tohoku earthquake-tsunami and the subsequent nuclear accident at the Fukushima Dai-ichi Nuclear Power Station (FDNPS) led to large-scale radionuclide contamination of the marine and freshwater environment. Monitoring studies of marine food products in the Fukushima region have generally demonstrated a declining trend in radiocaesium concentrations. However, the accumulation and elimination of radiocaesium and potential biological effects remain poorly understood for freshwater biota inhabiting highly contaminated areas at Fukushima. Consequently, the present study aimed to assess radiocaesium accumulation and developmental effects on the commercially important catadromous Japanese mitten crab, Eriocheir japonica. E. japonica were collected from four sites along a gradient of radionuclide contamination 4-44 km in distance from the FDNPS in 2017. To determine potential developmental effects, fluctuating asymmetry (FA) was used as a measure of developmental stability. Combined 134Cs and 137Cs values for whole E. japonica from highly contaminated sites 4 and 16 km in distance from the FDNPS were 3040 ± 521 and 2250 ± 908 Bq kg-1 wet weight respectively, 30 and 22 times greater than the Japanese standard limit of 100 Bq kg-1. Estimated total dose rates based on radiocaesium concentrations in whole crabs and sediment ranged from 0.016 to 37.7 μGy h-1. No significant relationship between radiocaesium accumulation and FA was recorded, suggesting that chronic radiation exposure at Fukushima is not inducing developmental effects in E. japonica as measured using fluctuating asymmetry. Furthermore, estimated dose rates were below proposed regulatory limits where significant deleterious effects are expected. The present study will aid in the understanding of the long-term consequences of radiation exposure for non-human biota and the management of radioactively contaminated environments.
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Affiliation(s)
- Neil Fuller
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire, PO4 9LY, UK.
| | - Jim T Smith
- School of Environmental, Geographical and Geological Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, Hampshire, PO1 3QL, UK
| | - Tsugiko Takase
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima City, Fukushima Prefecture, 960-1296, Japan
| | - Alex T Ford
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire, PO4 9LY, UK
| | - Toshihiro Wada
- Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima City, Fukushima Prefecture, 960-1296, Japan
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Hao W, Yan N, Xie M, Yan X, Guo X, Bai P, Guo P, Cheng T, Yan W. Origin of the exceptional selectivity of NaA zeolite for the radioactive isotope 90Sr 2+. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01958b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A NaA zeolite shows exceptionally high selectivity for radioactive 90Sr2+. Structural Rietveld refinements reveal that all Sr2+ ions are located at the center of the s6rs of lta cages.
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Affiliation(s)
- Wenfeng Hao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
| | - Nana Yan
- National Engineering, Research Center of Lower-Carbon Catalysis Technology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Miao Xie
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China
| | - Xiaojun Yan
- Division of Waste Disposal Technology, Waste Management Department, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - Xiliang Guo
- Division of Waste Disposal Technology, Waste Management Department, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - Pu Bai
- Luoyang Jalon Micro-Nano New Materials Co., Ltd, Luoyang 471900, China
| | - Peng Guo
- National Engineering, Research Center of Lower-Carbon Catalysis Technology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Tao Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, China
| | - Wenfu Yan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
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24
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Kato T, Nagaoka M, Guo H, Fujita H, Aida TM, Smith RL. Additive-free hydrothermal leaching method with low environmental burden for screening of strontium in soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:55725-55735. [PMID: 34138434 DOI: 10.1007/s11356-021-14916-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 06/10/2021] [Indexed: 06/12/2023]
Abstract
In this work, hydrothermal leaching was applied to simulated soils (clay minerals vermiculite, montmorillonite, and kaolinite) and actual soils (Terunuma, Japan) to generate organic acids with the objective to develop an additive-free screening method for determination of Sr in soil. Stable strontium (SrCl2) was adsorbed onto soils for the study, and ten organic acids (citric, L(+)-tartaric, succinic, oxalic, pyruvic, formic, glycolic, lactic, acetic, and propionic) were evaluated for leaching Sr from simulated soils under hydrothermal conditions (120 °C to 200 °C) at concentrations up to 0.3 M. For strontium-adsorbed vermiculite (Sr-V), 0.1 M citric acid was found to be effective for leaching Sr at 150 °C and 1 h treatment time. Based on these results, the formation of organic acids from organic matter in Terunuma soil was studied. Hydrothermal treatment of Terunuma soil produced a maximum amount of organic acids at 200 °C and 0.5 h reaction time. To confirm the possibility for leaching of Sr from Terunuma soil, strontium-adsorbed Terunuma soil (Sr-S) was studied. For Sr-S, hydrothermal treatment at 200 °C for 0.5 h reaction time allowed 40% of the Sr to be leached at room temperature, thus demonstrating an additive-free method for screening of Sr in soil. The additive-free hydrothermal leaching method avoids calcination of solids in the first step of chemical analysis and has application to both routine monitoring of metals in soils and to emergency situations.
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Affiliation(s)
- Takuma Kato
- Graduate School of Environmental Studies, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Mika Nagaoka
- Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai-mura, Ibaraki, Naka-gun, 319-1194, Japan.
| | - Haixin Guo
- Graduate School of Environmental Studies, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Hiroki Fujita
- Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai-mura, Ibaraki, Naka-gun, 319-1194, Japan
| | - Taku Michael Aida
- Faculty of Engineering, Department of Chemical Engineering, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Richard Lee Smith
- Graduate School of Environmental Studies, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
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25
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Firouzabadi M, Jahromi HJ, Ardakani HA. Determination of 90Sr in sea shell: environmental monitoring. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07871-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Ashraful Islam M, Hossain Sahadath M. Prediction of Potential Offsite TEDE, Excess Cancer Risk, Dominant Exposure Pathways, and Activity Concentration for Hypothetical Onsite Soil Contamination at the Proposed Rooppur Nuclear Power Plant. JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE 2021. [DOI: 10.1115/1.4048123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Abstract
This study evaluates the potential offsite radiological hazards by calculating total effective dose equivalent (TEDE) and excess cancer risk if onsite soil contamination occurs at the proposed Rooppur Nuclear Power Plant (RNPP) site, Bangladesh. The assessment has been performed assuming a hypothetical soil contamination associated with Fukushima Nuclear disaster with the help of the RESRAD (residual radioactivity) OFFSITE computer program developed by Argonne National Laboratory, U.S. Six radionuclides, namely, Cs-134, Cs-136, Cs-137, La-140, Sr-90, and Te-129m have been considered. The maximum TEDE has been found approximately 2.8 mSv/yr whereas the maximum total excess cancer risk shows a value of 3.25×10−3. The number of dominant exposure pathways, maximum contributor pathways, and duration of dominance of different nuclides have been identified. Ingestion of fish is identified as the principal pathway to both TEDE and excess cancer risk. Time variation of activity concentration and dose/source ratio have also been studied.
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Affiliation(s)
- Md. Ashraful Islam
- Department of Nuclear Engineering, University of Dhaka, Dhaka 1000, Bangladesh
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27
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Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident. Sci Rep 2021; 11:10335. [PMID: 33990650 PMCID: PMC8121844 DOI: 10.1038/s41598-021-89910-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 05/04/2021] [Indexed: 11/09/2022] Open
Abstract
The Fukushima-Daiichi Nuclear Power Plant (FNPP) accident in March of 2011 released substantial amounts of radionuclides into the environment. We collected 4,957 deciduous teeth formed in children before the Fukushima accident to obtain precise control data for teeth formed after the accident. Radioactivity was measured using imaging plates (IP) and epidemiologically assessed using multivariate regression analysis. Additionally, we measured 90Sr, 137Cs, and natural radionuclides which might be present in teeth. Epidemiological studies of IP showed that the amount of radioactivity in teeth from Fukushima prefecture was similar to that from reference prefectures. We found that artificial radionuclides of 90Sr and 137Cs, which were believed to have originated from past nuclear disasters, and natural radionuclides including 40 K and daughter nuclides in the 238U and 232Th series contributed to the generation of radioactivity in teeth. We also found no evidence to suggest that radionuclides originating from the FNPP accident significantly contaminated pre-existing teeth. This is the first large-scale investigation of radioactivity and radionuclides in teeth. The present findings will be indispensable for future studies of teeth formed after the FNPP accident, which will fall out over the next several years and might be more contaminated with radionuclides.
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28
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Kavasi N, Sahoo SK, Aono T. Analytical procedure using DGA-normal resin developed for separation of 90Sr from radiocaesium and other elements. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07662-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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29
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Sasa K, Honda M, Hosoya S, Takahashi T, Takano K, Ochiai Y, Sakaguchi A, Kurita S, Satou Y, Sueki K. A sensitive method for Sr-90 analysis by accelerator mass spectrometry. J NUCL SCI TECHNOL 2021. [DOI: 10.1080/00223131.2020.1801530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kimikazu Sasa
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Maki Honda
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
- Nuclear Safety Research Center, Japan Atomic Energy Agency, Naka-gun, Ibaraki, Japan
| | - Seiji Hosoya
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma, Japan
| | - Tsutomu Takahashi
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Kenta Takano
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yuta Ochiai
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Aya Sakaguchi
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Saori Kurita
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yukihiko Satou
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Tomioka, Fukushima, Japan
| | - Keisuke Sueki
- Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki, Japan
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30
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Guo C, Yuan M, He L, Cheng L, Wang X, Shen N, Ma F, Huang G, Wang S. Efficient capture of Sr2+ from acidic aqueous solution by an 18-crown-6-ether-based metal organic framework. CrystEngComm 2021. [DOI: 10.1039/d1ce00229e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Here, Guo et al. report a metal organic framework material (SNU-200) functionalized with an 18-crown-6-ether, whose specific binding site with an excellent affinity toward strontium leads to excellent Sr2+ adsorption capability under acidic conditions at low concentrations.
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Affiliation(s)
- Chenglong Guo
- State Key Laboratory of Nuclear Resources and Environment
- East China University of Technology
- Nanchang 330013
- China
- State Key Laboratory of Radiation Medicine and Protection
| | - Mengjia Yuan
- State Key Laboratory of Radiation Medicine and Protection
- School for Radiological and interdisciplinary Sciences (RAD-X)
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Soochow University
- Suzhou 215123
| | - Linwei He
- State Key Laboratory of Radiation Medicine and Protection
- School for Radiological and interdisciplinary Sciences (RAD-X)
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Soochow University
- Suzhou 215123
| | - Liwei Cheng
- State Key Laboratory of Radiation Medicine and Protection
- School for Radiological and interdisciplinary Sciences (RAD-X)
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Soochow University
- Suzhou 215123
| | - Xia Wang
- State Key Laboratory of Radiation Medicine and Protection
- School for Radiological and interdisciplinary Sciences (RAD-X)
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Soochow University
- Suzhou 215123
| | - Nannan Shen
- State Key Laboratory of Radiation Medicine and Protection
- School for Radiological and interdisciplinary Sciences (RAD-X)
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Soochow University
- Suzhou 215123
| | - Fuyin Ma
- State Key Laboratory of Radiation Medicine and Protection
- School for Radiological and interdisciplinary Sciences (RAD-X)
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Soochow University
- Suzhou 215123
| | - Guolin Huang
- State Key Laboratory of Nuclear Resources and Environment
- East China University of Technology
- Nanchang 330013
- China
| | - Shuao Wang
- State Key Laboratory of Radiation Medicine and Protection
- School for Radiological and interdisciplinary Sciences (RAD-X)
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions
- Soochow University
- Suzhou 215123
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31
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Ito C, Shimode R, Miyazaki T, Wakaki S, Suzuki K, Takagai Y. Isotope Dilution-Total Evaporation-Thermal Ionization Mass Spectrometric Direct Determination of Radioactive Strontium-90 in Microdrop Samples. Anal Chem 2020; 92:16058-16065. [PMID: 33172270 DOI: 10.1021/acs.analchem.0c03673] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thermal ionization mass spectrometry (TIMS) was used to directly quantify an ultratrace of radioactive 90Sr in microliter droplet samples. No chemical separation was required in removing isobaric interferences on M = 90 such as 90Zr and organic molecules in the mass spectrum because the difference in evaporation and ionization (emission) temperature among organic molecules, Zr and Sr, allows us to control the emission manner and significantly suppress the isobaric interferences. Direct quantification was achieved by improving the intercalibration of Faraday cups and ion counting in an isotope dilution (ID) method. Furthermore, the use of a total evaporation method (TE) enhanced the detection efficiency by the complete collection of the 90Sr ion beam from the samples and minimized the complexity of the fractionation effect in the isotope ratio calculation. In this study, 1 fg of 90Sr (equal to activity of 5 millibecquerel (mBq)) in a very low-volume sample with 108 times greater isobaric interference from 90Zr was successfully measured using the proposed ID-TE-TIMS method. The limit of detection was 0.029 fg (equal to 0.15 mBq) without any preconcentration. To demonstrate the wide usability of this method, low-volume samples of tears, eyelashes, saliva, environmental standards, and water samples (i.e., seawater and ground water) were analyzed within 1 h. The relationship of the measured values between this ID-TE-TIMS method and a radiometric analysis was shown to have good linearity.
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Affiliation(s)
- Chihiro Ito
- Faculty of Symbiotic Systems Science, Cluster of Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan
| | - Ryoya Shimode
- Faculty of Symbiotic Systems Science, Cluster of Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan
| | - Takashi Miyazaki
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natushima, Yokosuka, Kanagawa 237-0061, Japan
| | - Shigeyuki Wakaki
- Kochi Institute for Core Sample Research, JAMSTEC, 200 Monobe Otsu, Nankoku, Kochi 783-8502, Japan
| | - Katsuhiko Suzuki
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natushima, Yokosuka, Kanagawa 237-0061, Japan
| | - Yoshitaka Takagai
- Faculty of Symbiotic Systems Science, Cluster of Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan.,Institute of Environmental Radioactivity, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan
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32
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Zhang X, Liu Y. Ultrafast removal of radioactive strontium ions from contaminated water by nanostructured layered sodium vanadosilicate with high adsorption capacity and selectivity. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122907. [PMID: 32768821 DOI: 10.1016/j.jhazmat.2020.122907] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/26/2020] [Accepted: 04/26/2020] [Indexed: 06/11/2023]
Abstract
Layered sodium vanadosilicates was synthesized for removing soluble strontium ion (Sr2+) from simulated radioactive wastewater. SEM, EDS and TEM images indicated that layered sodium vanadosilicates had a nanostructure with flake-like shape providing an extremely large surface area. XRD, FTIR and XPS analyses further revealed a framework structure of adsorbent consisting of corner-sharing SiO4 tetrahedra and VO6 octahedra, with sodium ion being the major cation in the synthesized nanostructured layered sodium vanadosilicate. This study for the first time showed ultrafast adsorption of Sr2+ by nanostructured layered sodium vanadosilicates in a time frame of seconds with a high adsorption capacity of 174.3 mg/g estimated from Langmuir isotherm. It was found that about 99.0% of Sr2+ at an initial concentration of 5.00 mg/L and adsorbent dosage of 0.5 g/L could be removed within several seconds. The kinetic analysis further revealed that pseudo-second-order instead of pseudo-first-order kinetics could satisfactorily describe the observed ultrafast removal of Sr2+. In particular, the nanostructure layered sodium vanadosilicates exhibited an excellent affinity to Sr2+ over a wide pH range of 3-11. It was also demonstrated that the working mechanisms of nanostructured layered sodium vanadosilicates for Sr2+ removal mainly included surface electrostatic interaction and ion-exchange with sodium ion. Furthermore, nanostructure layered sodium vanadosilicates had significant advantages for Sr2+ removal compared with other adsorbents. Consequently, it is reasonable to expect that nanostructured layered sodium vanadosilicates synthesized in this study could be considered as a promising adsorbent for ultrafast and high-efficiency removal of radioactive Sr2+ from radioactive wastewaters.
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Affiliation(s)
- Xiaoyuan Zhang
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, 637141, Singapore
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
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33
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Vertical distribution of 90Sr and 137Cs in soils near the Fukushima Daiichi nuclear power station. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07294-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Yazdi MK, Vatanpour V, Taghizadeh A, Taghizadeh M, Ganjali MR, Munir MT, Habibzadeh S, Saeb MR, Ghaedi M. Hydrogel membranes: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 114:111023. [PMID: 32994021 DOI: 10.1016/j.msec.2020.111023] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 04/22/2020] [Accepted: 04/26/2020] [Indexed: 12/12/2022]
Abstract
Hydrogel membranes (HMs) are defined and applied as hydrated porous media constructed of hydrophilic polymers for a broad range of applications. Fascinating physiochemical properties, unique porous architecture, water-swollen features, biocompatibility, and special water content dependent transport phenomena in semi-permeable HMs make them appealing constructs for various applications from wastewater treatment to biomedical fields. Water absorption, mechanical properties, and viscoelastic features of three-dimensional (3D) HM networks evoke the extracellular matrix (ECM). On the other hand, the porous structure with controlled/uniform pore-size distribution, permeability/selectivity features, and structural/chemical tunability of HMs recall membrane separation processes such as desalination, wastewater treatment, and gas separation. Furthermore, supreme physiochemical stability and high ion conductivity make them promising to be utilised in the structure of accumulators such as batteries and supercapacitors. In this review, after summarising the general concepts and production processes for HMs, a comprehensive overview of their applications in medicine, environmental engineering, sensing usage, and energy storage/conservation is well-featured. The present review concludes with existing restrictions, possible potentials, and future directions of HMs.
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Affiliation(s)
- Mohsen Khodadadi Yazdi
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Iran, Tehran.
| | - Ali Taghizadeh
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Mohsen Taghizadeh
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran; Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Muhammad Tajammal Munir
- College of Engineering and Technology, American University of the Middle East, Kuwait; Department of Chemical and Materials Engineering, The University of Auckland, New Zealand
| | - Sajjad Habibzadeh
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Mohammad Reza Saeb
- Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran, Iran
| | - Mehrorang Ghaedi
- Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
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35
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Li G, Ji G, Liu W, Zhang J, Song L, Cheng L, Wang X, Wang Y, Liu J, Chen X, Sun X, Diwu J. A hydrolytically stable anionic layered indium-organic framework for the efficient removal of 90Sr from seawater. Dalton Trans 2019; 48:17858-17863. [PMID: 31777910 DOI: 10.1039/c9dt03112j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Efficient removal of radioactive 90Sr from nuclear waste solutions and natural water systems is of vital importance due to its radioactive nature and high mobility. We present here an anionic layered compound (NC4H12)(NC2H8)2[In3(pydc)6]·13.1H2O (SZ-6; pydc = 2,5-pyridinedicarboxylic acid) with the potential remediation ability towards radioactive Sr2+ from seawater. This material exhibits excellent β and γ radiation resistance both in air and in aqueous solutions. Besides, this material could maintain its structural integrity in real seawater for 77 days. The adsorption experiment results show that SZ-6 exhibits superior Sr2+ removal capability over a wide pH range from 4 to 12 with fast adsorption kinetics and high selectivity. The effective removal of 90Sr from real seawater was demonstrated as well. Our results strongly suggest the potential application of SZ-6 for selectively capturing radionuclides in natural water systems.
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Affiliation(s)
- Guodong Li
- Xi'an Research Institute of Hi-Technology, Hong Qing Town, Xi'an 710025, People's Republic of China. and School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Guoxun Ji
- Xi'an Research Institute of Hi-Technology, Hong Qing Town, Xi'an 710025, People's Republic of China.
| | - Wei Liu
- School of Environment and Material Engineering, Yantai University, Yantai 264005, Shandong, China
| | - Jiarong Zhang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Liping Song
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Liwei Cheng
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Xia Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Yanlong Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Jianjun Liu
- The 986th Hospital of the People's Liberation Army Air Force, Xi'an 710054, Shaanxi, China
| | - Xudan Chen
- Xi'an Research Institute of Hi-Technology, Hong Qing Town, Xi'an 710025, People's Republic of China.
| | - Xinli Sun
- Xi'an Research Institute of Hi-Technology, Hong Qing Town, Xi'an 710025, People's Republic of China.
| | - Juan Diwu
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
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Accurate and precise determination of 90Sr at femtogram level in IAEA proficiency test using Thermal Ionization Mass Spectrometry. Sci Rep 2019; 9:16532. [PMID: 31712653 PMCID: PMC6848187 DOI: 10.1038/s41598-019-52890-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 10/24/2019] [Indexed: 11/08/2022] Open
Abstract
A novel method for the determination of ultra-trace level 90Sr has been recently developed applying thermal ionization mass spectrometry (TIMS). The method includes the chemical separation of Zr (isobaric interference of 90Zr) from the samples followed by determination of 90Sr/88Sr abundance sensitivity (2.1 × 10−10). The analytical performance of this method was assessed in the IAEA-TEL 2017-3 worldwide open proficiency test. For 90Sr determination, tap water and milk powder samples were distributed amongst the participant laboratories with reference values of 11.2 ± 0.3 Bq kg−1 (2.2 ± 0.1 fg g−1) and 99.9 ± 5.0 Bq kg−1 (19.5 ± 1.0 fg g−1), respectively. The stable Sr concentrations were 39.4 ± 0.9 ng g−1 and 2.5 ± 0.1 µg g−1 while the 90Sr/88Sr isotope ratios were 6.47 ± 0.17 × 10−8 and 9.04 ± 0.45 × 10−9 in the tap water and milk powder samples, respectively. For TIMS measurement, 50 mL water and 1 g milk powder samples were taken for analysis. This TIMS method demonstrated an impressive accuracy (relative bias of 4.2% and −2.1%, respectively) and precision (relative combined uncertainty of 4.1% and 7.6%, respectively) when compared with radiometric techniques. For the first time in the history of inorganic mass-spectrometry, 90Sr analysis using a TIMS instrument is confirmed by an independent proficiency test.
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Designing yeast as plant-like hyperaccumulators for heavy metals. Nat Commun 2019; 10:5080. [PMID: 31704944 PMCID: PMC6841955 DOI: 10.1038/s41467-019-13093-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 10/14/2019] [Indexed: 02/01/2023] Open
Abstract
Hyperaccumulators typically refer to plants that absorb and tolerate elevated amounts of heavy metals. Due to their unique metal trafficking abilities, hyperaccumulators are promising candidates for bioremediation applications. However, compared to bacteria-based bioremediation systems, plant life cycle is long and growing conditions are difficult to maintain hindering their adoption. Herein, we combine the robust growth and engineerability of bacteria with the unique waste management mechanisms of plants by using a more tractable platform-the common baker’s yeast-to create plant-like hyperaccumulators. Through overexpression of metal transporters and engineering metal trafficking pathways, engineered yeast strains are able to sequester metals at concentrations 10–100 times more than established hyperaccumulator thresholds for chromium, arsenic, and cadmium. Strains are further engineered to be selective for either cadmium or strontium removal, specifically for radioactive Sr90. Overall, this work presents a systematic approach for transforming yeast into metal hyperaccumulators that are as effective as their plant counterparts. Existing heavy metal bioremediation systems are mainly based on plants, which require long growing time in specific conditions. Here, the authors mimic the characteristics of plant hyperaccumulators to engineer more tractable baker’s yeast and achieve 10–100-fold higher accumulation of chromium, arsenic, or cadmium.
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38
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Qi L, Zhao W. Strontium uptake and antioxidant capacity comparisons of low accumulator and high accumulator oat ( Avena sativa L.) genotypes. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2019; 22:227-235. [PMID: 31468984 DOI: 10.1080/15226514.2019.1658704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The main object of the present study is to investigate genotypic differences in strontium (Sr) resistance of two oat varieties, including Neimengkeyi-1 (high accumulator) and Bayou-3 (low accumulator). The growth and antioxidant enzyme responses to five Sr concentrations (0, 25, 100, 500, and 1000 mg kg-1) were compared after 30-day Sr treatment. The shoot-Sr concentrations of Neimengkeyi-1 were higher than those of Bayou-3 in all treatments. The translocation factors of Neimengkeyi-1 in all treatments were greater than 1 and significantly higher than those of Bayou-3. Sr ions did not affect the growth of Neimengkeyi-1. The H2O2 contents and the leaf malondialdehyde contents of Neimengkeyi-1 were lower than those of Bayou-3. The activities of superoxide dismutase (SOD), catalase (CAT), and peroxidase of Neimengkeyi-1 were significantly higher than those of Bayou-3. Significant negative correlations were found between H2O2 contents and SOD and CAT activities in Neimengkeyi-1. The results of this study suggest that Sr accumulation patterns have significant genotypic differences, and SOD and CAT may play a pivotal role in the detoxification mechanism of Sr.
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Affiliation(s)
- Lin Qi
- Agricultural College, Henan University of Science and Technology, Luoyang, China
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Wei Zhao
- Agricultural College, Henan University of Science and Technology, Luoyang, China
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39
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Nguyen DM, Moody WA, Williamson JA. A Simple Method to Screen for Radiostrontium in Water by Ion Exchange Chromatography. HEALTH PHYSICS 2019; 116:771-775. [PMID: 30844900 DOI: 10.1097/hp.0000000000001020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Radiostrontium isotopes (Sr, Sr, and Sr) are major fission by-products in nuclear reactors, in radiological events, and in environmental radioactive contamination. A method to analyze Sr and Sr in water has been developed using gradient elution with dilute hydrochloric acid and cation exchange resin, followed by carbonate precipitation. Counting was done on a gas proportional counter. The sample was recounted a second time after 2 to 3 wk to permit Y, a progeny of Sr, to achieve secular equilibrium and to allow Sr and Sr to be determined. This method was found to be simple, exhibiting high recovery, reduced use of hazardous chemicals, and lower cost compared to other current methods. An extensive comparison of the performance of the cation exchange method vs. a method using strong nitric acid (US Environmental Protection Agency Method 905.0) and a method using a specific strontium resin was conducted on performance test samples containing Sr (in a number of matrices) from the US Department of Energy's Mixed Analyte Performance Evaluation Program and mixed Sr- and Sr-containing water samples from the Environmental Resource Associates quality assurance program. The method described here is shown to yield comparable results to others.
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Affiliation(s)
- Dao M Nguyen
- 1Florida Department of Health, Bureau of Radiation Control
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40
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Zhang Z, Igarashi J, Satou Y, Ninomiya K, Sueki K, Shinohara A. Activity of 90Sr in Fallout Particles Collected in the Difficult-to-Return Zone around the Fukushima Daiichi Nuclear Power Plant. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:5868-5876. [PMID: 31034221 DOI: 10.1021/acs.est.8b06769] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident released abundant radioactive particles into the surrounding environment. Herein, we analyzed the activity of 90Sr in these particles to estimate the contribution of this radionuclide to the overall radiation exposure and shed light on the processes that occurred during the accident. Seven radioactive particles were isolated from the dust and soil samples collected from areas surrounding the FDNPP, and the minimum/maximum 137Cs activities were determined as 224/4,100 Bq. Based on the size, specific activity, and 134Cs/137Cs activity ratios, we concluded that six of the seven radioactive particles were released from the Unit 1 reactor, while one particle was released from the Unit 3 reactor by a hydrogen explosion. Strontium-90 was detected in all radioactive particles, and the minimal/maximal 90Sr activities were determined as 0.046/1.4 Bq. 137Cs/90Sr activity ratios above 1000 were observed for all seven particles, that is, compared to 137Cs, 90Sr had negligible contribution to the overall radiation exposure. The 137Cs/90Sr activity ratios of the radioactive particles were similar to those of terrestrial environmental samples and were higher for particles released from the Unit 1 reactor than for samples collected from the Unit 1 reactor building, which indicates possibility of additional 90Sr-rich contamination after release of the particles.
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Affiliation(s)
- Zijian Zhang
- Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Junya Igarashi
- Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Yukihiko Satou
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS) , Japan Atomic Energy Agency , 790-1 Otsuka, Motooka , Tomioka , Fukushima 979-1195 , Japan
| | - Kazuhiko Ninomiya
- Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Keisuke Sueki
- Center for Research in Isotopes and Environmental Dynamics (CRiED) , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan
| | - Atsushi Shinohara
- Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
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41
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Mishra S, Kasar S, Takamasa A, Veerasamy N, Sahoo SK. Measurement of uranium distribution coefficient and 235U/ 238U ratio in soils affected by Fukushima dai-ichi nuclear power plant accident. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2019; 198:36-42. [PMID: 30580113 DOI: 10.1016/j.jenvrad.2018.12.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/14/2018] [Accepted: 12/14/2018] [Indexed: 06/09/2023]
Abstract
Fukushima Daiichi Nuclear Power Plant (FDNPP) accident resulted radioactive contamination in soil due to deposition of mainly radiocesium as well as many long-lived radionuclides surrounding a large area around FDNPP. Depending upon environmental conditions, radionuclides in soil can be mobilized in aquatic systems. Therefore, the fate and transfer of these radionuclides in the soil water system is very important for radiation protection and dose assessment. In the present study, soil and water samples were collected from contaminated areas around FDNPP. Inductively coupled plasma mass spectrometry (ICP-MS) is used for total uranium concentration. Emphasis has been given on isotope ratio measurement of 235U/238U ratio using thermal ionization mass spectrometry (TIMS) that gives us the idea about its contamination during accident. For the migration behavior, its distribution coefficient (Kd) has been determined using laboratory batch method. Chemical characterization of soil with respect to different parameters has been carried out. The effect of these soil parameters on distribution coefficient of uranium has been studied in order to explain the radionuclide mobility in this particular area. The distribution coefficient values for uranium are found to vary from 30 to 36000 L/kg. A large variation in the distribution coefficient values shows the retention or mobility of uranium is highly dependent on soil characteristics in the particular area. This variation is explained with respect to soil pH, Fe, Mn, CaCO3 and organic content. There is a very good correlation of uranium Kd obtained with Fe content. There is no enrichment of 235U has been noticed in the studied area.
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Affiliation(s)
- S Mishra
- Fukushima Project Headquarters, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1Anagawa, Inage-ku, Chiba, 263-8555, Japan; Radiation Safety System Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - S Kasar
- Fukushima Project Headquarters, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - A Takamasa
- Fukushima Project Headquarters, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - N Veerasamy
- Fukushima Project Headquarters, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1Anagawa, Inage-ku, Chiba, 263-8555, Japan; Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo, 116-8551, Japan
| | - S K Sahoo
- Fukushima Project Headquarters, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1Anagawa, Inage-ku, Chiba, 263-8555, Japan.
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42
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Burger A, Lichtscheidl I. Strontium in the environment: Review about reactions of plants towards stable and radioactive strontium isotopes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:1458-1512. [PMID: 30759584 DOI: 10.1016/j.scitotenv.2018.10.312] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 06/09/2023]
Abstract
Radiostrontium is released to the environment from routine and accidental discharge and acts on living organisms either from external sources or after absorption. When incorporated by plants, it enters the food chain and causes primary threat to human health and the environment. Understanding the mechanisms of plants for strontium uptake and retention is therefore essential for decision making concerning agriculture: are uptake rates low enough so that plants can serve as food? Or is radiostrontium accumulated so that plants should not be eaten but could be probably used for extracting strontium from water and soil in hot spots of pollution? The review presents a summary of studies about the origin of stable and radioactive strontium in the environment and effects coming from both internal and external exposure of plants. Mobility and availability of strontium to plant roots in soil are controlled by external factors such as chemical composition of the soil and pH, temperature and agricultural soil cultivation as well as soil biological networks built by microbial communities. Plant surfaces may receive input of strontium from deposition induced by atmospheric pollution or by acquisition from water through the whole immersed surface. Cells have entry mechanisms for strontium such as plasma membrane transporters for calcium and potassium. Part of absorbed strontium can be lost via processes discussed in this review. We give examples on strontium transfer factors for 149 plants to estimate plant absorption capacity for strontium from soil, water and air. Uptake efficiency of terrestrial and aquatic plants is deciding about their remediation potential to either remove radiostrontium by accumulation and rhizofiltration or to retain it in roots or aerial parts. Data of strontium content in soils after fallout and edible plants from long-term monitoring support the evaluation of the potential hazards posed by strontium input to the food chain.
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Affiliation(s)
- Anna Burger
- University of Vienna, Core Facility Cell Imaging and Ultrastructure Research, Althanstrasse 14, A-1090 Vienna, Austria.
| | - Irene Lichtscheidl
- University of Vienna, Core Facility Cell Imaging and Ultrastructure Research, Althanstrasse 14, A-1090 Vienna, Austria
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43
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Kavasi N, Sahoo SK. Method for 90Sr Analysis in Environmental Samples Using Thermal Ionization Mass Spectrometry with Daly Ion-Counting System. Anal Chem 2019; 91:2964-2969. [PMID: 30701955 DOI: 10.1021/acs.analchem.8b05184] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this work, a new 90Sr analysis method was developed using the Isotopx Ltd., Phoenix X62 thermal ionization mass spectrometer (TIMS). Excellent ion beam sensitivity was demonstrated with the detection of 1 mBq (0.2 fg) 90Sr on a Daly ion-counting system. The abundance sensitivity for the 90Sr/88Sr ratio was 2.1 × 10-10, and this could ensure measurement of 100 Bq·kg-1 (19 fg·g-1) 90Sr in an environmental sample with 100 μg·g-1 stable strontium concentration. For analytical method validation, 90Sr was determined in two certified reference materials, for example, wild berry (IRMM-426) and freshwater lake sediment (NIST-4354), for the first time in the history of TIMS. This mass spectrometry method is faster than conventional radiometric techniques; however, interference from 90Zr and peak tailing on the higher mass side from 88Sr must be considered for a reliable 90Sr determination.
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Affiliation(s)
- Norbert Kavasi
- Fukushima Project Headquarters , National Institutes for Quantum and Radiological Science and Technology (QST) 4-9-1, Anagawa , Inage-ku , Chiba , 263-8555 , Japan
| | - Sarata Kumar Sahoo
- Fukushima Project Headquarters , National Institutes for Quantum and Radiological Science and Technology (QST) 4-9-1, Anagawa , Inage-ku , Chiba , 263-8555 , Japan
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44
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Kierepko R, Sahoo SK, Hosoda M, Tokonami S, Sorimachi A, Kim E, Ohno M. 238Pu/ (239+240)Pu activity ratio as an indicator of Pu originating from the FDNPP accident in the terrestrial environment of Fukushima Prefecture. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2019; 196:133-140. [PMID: 30453130 DOI: 10.1016/j.jenvrad.2018.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/08/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
The Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident has caused significant radionuclide contamination. Pu isotopes at the level of GBq were released from the damaged reactors to terrestrial and marine ecosystems. In this work, 35 samples were collected at different locations of Fukushima. Samples consisted of three types, soil, forest litter and alluvial dust (road dust, sludges from drainage systems and below gutter pipe outflows). The obtained activity ratios of 238Pu/(239+240)Pu ranged from 0.030 to 1.86. 14 of our samples contained trace amounts of Pu originating from the damaged reactors (2SM verification). Our study identified a few previously unknown "hot spots" of 238Pu/(239+240)Pu activity ratio localized in an area between 15 and 30 km in the northwest direction from the FDNPP. Additionally, results obtained in this study combined with previously published data allowed us to prepare a map of spatial distribution of the Pu isotope fingerprints (238Pu/(239+240)Pu) in Fukushima Prefecture.
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Affiliation(s)
- R Kierepko
- Fukushima Project Headquarters, National Institute for Quantum and Radiological Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Department of Nuclear Physical Chemistry, Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Radzikowskiego 152, Poland
| | - S K Sahoo
- Fukushima Project Headquarters, National Institute for Quantum and Radiological Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan.
| | - M Hosoda
- Department of Radiation Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan
| | - S Tokonami
- Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan
| | - A Sorimachi
- Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan; Department of Radiation Physics and Chemistry, School of Medicine, Fukushima Medical University, Hikarigaoka 1, Fukushima, 960-1295, Japan
| | - E Kim
- Department of Radiation Measurement and Dose Assessment, National Institute for Quantum and Radiological Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - M Ohno
- Department of Radiation Measurement and Dose Assessment, National Institute for Quantum and Radiological Sciences and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
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45
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Chen F, Hu J, Takahashi Y, Yamada M, Rahman MS, Yang G. Application of synchrotron radiation and other techniques in analysis of radioactive microparticles emitted from the Fukushima Daiichi Nuclear Power Plant accident-A review. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2019; 196:29-39. [PMID: 30388426 DOI: 10.1016/j.jenvrad.2018.10.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 10/21/2018] [Indexed: 06/08/2023]
Abstract
During the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, large amounts of radioactive materials were released into the environment. Among them, a large proportion of the radionuclides, such as Cs, entered into the environment as radioactive microparticles (RMs). In recent years, the characterization of RMs based on synchrotron radiation (SR) techniques has been reported, since their physical and chemical properties played an important role in evaluating the chemical reactions and physical changes that occurred when the nuclear material meltdowns took place. In this review, we summarize separation and measurement technologies used in studies of RMs, and we emphasize the application of SR-based techniques in the characterization of RMs. We report research progress, including information for elemental composition, isotopic distribution, radioactivity, and formation processes. Also, we compare the RMs from the FDNPP and the Chernobyl Nuclear Power Plant accidents. The SR-based technologies offer great improvement in the resolution and precision compared to conventional technologies, such as X-ray fluorescence and X-ray diffraction.
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Affiliation(s)
- Fei Chen
- Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China
| | - Jun Hu
- Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan
| | - Yoshio Takahashi
- Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masatoshi Yamada
- Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan
| | - M Safiur Rahman
- Atmospheric & Environmental Chemistry Lab. Chemistry Division, Atomic Energy Centre, Dhaka, 1000, Bangladesh
| | - Guosheng Yang
- Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan.
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46
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Shao Y, Yang G, Tazoe H, Ma L, Yamada M, Xu D. A review of measurement methodologies and their applications to environmental 90Sr. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 192:321-333. [PMID: 30029206 DOI: 10.1016/j.jenvrad.2018.07.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 07/13/2018] [Accepted: 07/14/2018] [Indexed: 06/08/2023]
Abstract
The high fission yield product 90Sr has been released into the environment in large amounts due to nuclear weapon tests, nuclear power plant accidents, and nuclear fuel reprocessing industries. It is a long half-life radionuclide (28.9 y), with serious consequences to human health; hence, it is desirable to perform routine monitoring of 90Sr in environmental samples. Many 90Sr radiometric methods have been developed in the past decades, which generally require complicated separation and purification steps with a relatively long analytical time. Moreover, some nominally rapid methods usually have high method detection limits, making them unsuitable for the environmental samples with ultra-low 90Sr levels. In this review, some rapid and practical methods for 90Sr routine monitoring are summarized. Different sample pretreatments and major purification procedures for 90Sr developed in recent years, such as variable digestion methods and extraction chromatography using Sr resin or DGA resin, are especially described. Additionally, four conventional and widely used β spectrometric and mass spectrometric methods are demonstrated. Finally, 90Sr evaluations focusing on contaminated soil and seawater samples collected after the Fukushima Daiichi Nuclear Power Plant accident, and 90Sr application as tracers for environmental behavior are also reviewed.
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Affiliation(s)
- Yang Shao
- Beijing Engineering Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; Department of Radiation Chemistry, Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guosheng Yang
- Department of Radiation Chemistry, Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
| | - Hirofumi Tazoe
- Department of Radiation Chemistry, Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
| | - Lingling Ma
- Beijing Engineering Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Masatoshi Yamada
- Department of Radiation Chemistry, Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan.
| | - Diandou Xu
- Beijing Engineering Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
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47
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Zirconium decontamination factor test on DGA and Sr resin for 90Sr analysis using inorganic mass spectrometry. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-6312-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Zhang Z, Ninomiya K, Yamaguchi Y, Kita K, Tsuruta H, Igarashi Y, Shinohara A. Atmospheric Activity Concentration of 90Sr and 137Cs after the Fukushima Daiichi Nuclear Accident. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:9917-9925. [PMID: 30080962 DOI: 10.1021/acs.est.8b01697] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
On March 11, 2011, the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident occurred and large amounts of radionuclides were discharged into the atmosphere. We have operated continuous aerosol samplings at four locations in Japan from the accident until the end of 2011. The activities of 90Sr and 137Cs in the aerosol samples were measured using low background liquid scintillation counters and high-purity germanium detectors, respectively. The atmospheric 90Sr and 137Cs concentrations decreased exponentially during 2011. The time variation of the 90Sr/137Cs ratio was obtained, and we found that the ratio rose from 1.2 × 10-3 in March to 1.3 × 10-1 in August 2011. One reason for the increase in the 90Sr/137Cs ratio could be the change in the primary emission source of activity at the FDNPP, which occurred near June 2011.
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Affiliation(s)
- Zijian Zhang
- Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Kazuhiko Ninomiya
- Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
| | - Yoshiaki Yamaguchi
- Radioisotope Research Center , Osaka University , 2-4 Yamadaoka , Suita , Osaka 565-0871 , Japan
| | - Kazuyuki Kita
- College of Science , Ibaraki University , 2-1-1 Bunkyo , Mito , Ibaraki 310-8512 , Japan
| | - Haruo Tsuruta
- Remote Sensing Technology Center of Japan , 3-17-1Toranomon , Minatoku , Tokyo 105-0001 , Japan
| | - Yasuhito Igarashi
- Meteorological Research Institute , 1-1 Nagamine , Tsukuba , Ibaraki 305-0052 , Japan
| | - Atsushi Shinohara
- Graduate School of Science , Osaka University , 1-1 Machikaneyama , Toyonaka , Osaka 560-0043 , Japan
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Wang C, Lee KA, Choi E, Lee KY, Lee SY, Jung KH, Park J. Enhancement of radionuclide bio-decontamination by screening highly efficient microalgae for Sr biomineralization. LAB ON A CHIP 2018; 18:2270-2278. [PMID: 29979459 DOI: 10.1039/c8lc00227d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, a new strategy for improving the radionuclide bio-decontamination (RBD) activity of microalgae by screening a better strain with high potential for biomineral production has been proposed. A noninvasive dielectrophoresis (DEP)-based microalgae screening microplatform has been used to select the highly capable microalgae in RBD. Microalgae (Chlorella vulgaris KMMCC9) with a high degree of competence in strontium (Sr) removal were successfully segregated against Chlorella vulgaris KCTC AG10002 that has relatively weak Sr removal activity under an AC electric field. C. vulgaris KMMCC9 with higher Sr biomineral competence (HSC) was also successfully segregated against others with lower Sr biomineral competence (LSC). Furthermore, after the screening and large-scale cultivation of C. vulgaris KMMCC9 with HSC, the microalgae showed highly effective Sr bio-decontamination in both non-radioactive and radioactive Sr contaminated water compared to wild-type (WT).
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Affiliation(s)
- Cong Wang
- Department of Mechanical Engineering, Sogang University, 35 Baekbeom-ro (Shinsu-dong), Mapo-gu, Seoul 04107, South Korea
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50
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Yamaguchi A, Tanaka M, Kurihara Y, Takahashi Y. Local structure of strontium adsorbed on 2:1 clay minerals and its comparison with cesium by XAFS in terms of migration of their radioisotopes in the environment. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5895-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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