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Lee E, Kim M, Jeong DH, Kim YT, Shin I, Park H, Lee C, Lee SH, Kim HK. Characterization of seasonal behaviors of naturally occurring radioactive materials in a groundwater borehole using an in situ monitoring system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 902:165779. [PMID: 37495147 DOI: 10.1016/j.scitotenv.2023.165779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/04/2023] [Accepted: 07/23/2023] [Indexed: 07/28/2023]
Abstract
Understanding the temporal behaviors of naturally occurring radioactive materials is important for safeguarding groundwater as a secure water resource for drinking, agriculture, and industry usage. This study reports the vertical profiles of 238U concentration and 222Rn activity and the management of in situ monitoring systems during intensive field sampling of a national groundwater-monitoring borehole for seven years (2015-2021). The aim was to capture the seasonal characteristics of the 238U concentrations and 222Rn activity. Both factors were low in the rainy season and high in the winter season, reflecting the dilution effect of rainfall recharge. The 238U and 222Rn behaviors were associated with water-rock interactions of calcite dissolution in fracture zones filled with carbonate minerals. Furthermore, multilayer perceptron models estimated the 238U concentration and 222Rn activity with reasonable regression and classification accuracy. Hydrometeorological indicators (temperature and groundwater-level fluctuations) were more important estimators of 238U concentration and 222Rn activity than geochemical process indicators. The regression accuracy performance was higher at deeper sampling depths, where seasonality in the 238U and 222Rn behaviors dominated. From the predicted distributions of 238U concentrations and 222Rn activities, we could estimate the ranges of 238U concentrations and 222Rn activities emerging from groundwater boreholes. High exposure threats from 238U and 222Rn during groundwater usage were found in the winter season. When the multilayer perceptron models use the entire in situ monitoring data at refined temporal resolution, we can quickly determine the naturally occurring radioactive materials and further develop the national groundwater-monitoring borehole equipped with the in-situ monitoring system, supplementing the occasionally obtained field-measurement data.
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Affiliation(s)
- Eunhyung Lee
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea
| | - MoonSu Kim
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea
| | - Do-Hwan Jeong
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea
| | - Youn-Tae Kim
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea
| | - Inkyu Shin
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea
| | - Hyemin Park
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea
| | - Changyong Lee
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea
| | - Soo-Hyung Lee
- Environmental Infrastructure Research Department, National Institute of Environmental Research, Incheon 22689, South Korea
| | - Hyun-Koo Kim
- Soil and Groundwater Research Division, National Institute of Environmental Research, Incheon 22689, South Korea.
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Zhang Y, Huang S, Mei B, Jia L, Liao J, Zhu W. Construction of dopamine supported Mg(Ca)Al layered double hydroxides with enhanced adsorption properties for uranium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 881:163525. [PMID: 37068682 DOI: 10.1016/j.scitotenv.2023.163525] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 04/11/2023] [Accepted: 04/11/2023] [Indexed: 06/01/2023]
Abstract
A novel dopamine-supported Mg(Ca)Al layered double hydroxide composite was synthesized by co-precipitation method. The existence of Ca2+ and dopamine could promote the capture of uranium on the layered double hydroxides. In batch experiments, the composite exhibited good uranium removal performance, including high adsorption capacity (687.3 mg/g), strong anti-interference and good reusability (the removal percentage was still higher than 90 % after five cycles). At low initial uranium concentration, the uranium removal percentage on the composite exceeded 99.7 % and the residual concentration of uranium in the solution was <0.03 mg/L, reaching the limited standard of the World Health Organization. The studies of adsorption kinetics and isotherm indicated that the uranium adsorption behavior on the composite conformed to the pseudo-second-order kinetic and Langmuir isotherm models, suggesting that the process was a monolayer adsorption dominated by chemical adsorption. Furthermore, the high-efficiency uranium adsorption on the Mg(Ca)Al layered double hydroxide was mainly attributed to the strong complexation between the active sites (-OH and -NH2) and uranium, the precipitation of interlayer intercalation ions (CO32- and OH-) to uranium and the ion exchange of Ca2+ to uranium. Due to these advantages, the dopamine-supported Mg(Ca)Al layered double hydroxide composite is expected to be used as fine adsorbent to remove uranium from wastewater.
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Affiliation(s)
- Yong Zhang
- State Key Laboratory of Environment-friendly Energy Materials, Sichuan Co-Innovation Center for New Energetic Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Nuclear Waste and Environmental Safety Key Laboratory of Defense, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China.
| | - Siqi Huang
- State Key Laboratory of Environment-friendly Energy Materials, Sichuan Co-Innovation Center for New Energetic Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Nuclear Waste and Environmental Safety Key Laboratory of Defense, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Bingyu Mei
- State Key Laboratory of Environment-friendly Energy Materials, Sichuan Co-Innovation Center for New Energetic Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Nuclear Waste and Environmental Safety Key Laboratory of Defense, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Lingyi Jia
- State Key Laboratory of Environment-friendly Energy Materials, Sichuan Co-Innovation Center for New Energetic Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Nuclear Waste and Environmental Safety Key Laboratory of Defense, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jun Liao
- State Key Laboratory of Environment-friendly Energy Materials, Sichuan Co-Innovation Center for New Energetic Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Nuclear Waste and Environmental Safety Key Laboratory of Defense, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China.
| | - Wenkun Zhu
- State Key Laboratory of Environment-friendly Energy Materials, Sichuan Co-Innovation Center for New Energetic Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Nuclear Waste and Environmental Safety Key Laboratory of Defense, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
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Li Vigni L, Daskalopoulou K, Calabrese S, Kyriakopoulos K, Bellomo S, Brusca L, Brugnone F, D'Alessandro W. Characterization of trace elements in thermal and mineral waters of Greece. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27829-x. [PMID: 37268809 DOI: 10.1007/s11356-023-27829-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 05/18/2023] [Indexed: 06/04/2023]
Abstract
Natural thermal and mineral waters are widely distributed along the Hellenic region and are related to the geodynamic regime of the country. The diverse lithological and tectonic settings they are found in reflect the great variability in their chemical and isotopic composition. The current study presents 276 (published and unpublished) trace element water data and discusses the sources and processes affecting the water by taking into consideration the framework of their geographic distribution. The dataset is divided in groups using temperature- and pH-related criteria. Results yield a wide range of concentrations, often related to the solubility properties of the individual elements and the factors impacting them (i.e. temperature, acidity, redox conditions and salinity). Many elements (e.g. alkalis, Ti, Sr, As and Tl) present a good correlation with temperature, which is in cases impacted by water rock interactions, while others (e.g. Be, Al, Cu, Se, Cd) exhibit either no relation or an inverse correlation with T possibly because they become oversaturated at higher temperatures in solid phases. A moderately constant inverse correlation is noticed for the vast majority of trace elements and pH, whereas no relationship between trace element concentrations and Eh was found. Seawater contamination and water-rock interaction seem to be the main natural processes that influence both salinity and elemental content. All in all, Greek thermomineral waters exceed occasionally the accepted limits representing in such cases serious harm to the environment and probably indirectly (through the water cycle) to human health.
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Affiliation(s)
| | - Kyriaki Daskalopoulou
- Institute of Geosciences, University of Potsdam, Karl-Liebknecht-Str. 24-25, Potsdam-Golm, Germany
- Physics of Earthquakes and Volcanoes, GeoForschungs Zentrum, Helmholtzstraße 6/7, Potsdam, Germany
| | - Sergio Calabrese
- DiSTeM, University of Palermo, Via Archirafi 36, Palermo, Italy
- Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Via Ugo La Malfa 153, Palermo, Italy
| | - Konstantinos Kyriakopoulos
- Faculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, Ano Ilissia, Panestimioupolis, Greece
| | - Sergio Bellomo
- Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Via Ugo La Malfa 153, Palermo, Italy
| | - Lorenzo Brusca
- Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Via Ugo La Malfa 153, Palermo, Italy
| | | | - Walter D'Alessandro
- Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Via Ugo La Malfa 153, Palermo, Italy.
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Xarchoulakos DC, Manoutsoglou E, Kallithrakas-Kontos NG. Distribution of uranium isotopes, 210Pb and 210Po in groundwaters of Crete- Greece. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08578-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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