Iodine-129 for determining the origin of salinity in groundwater in Pampanga, Philippines

Tan, Shuya; Bautista, Angel T.; Mendoza, Norman; Racadio, Charles Darwin; Puthenpurekal, M.; Resurreccion, Augustus C.; Matsuzaki, Hiroyuki

doi:10.1016/j.jenvrad.2020.106239

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Other isotopes of less diffuse elements have been applied in the last decades, to add more opportunities in hydrological and hydrogeological studies [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The most frequently used environmental stable isotopes are: δ 2 H and δ 18 O of water molecule, δ 15 N and δ 18 O (NO 3 − ), δ 34 S (SO 4 2− ), and δ 13 C (CO 3 2− and HCO 3 − ). Tritium (the radioactive isotope of hydrogen) has been used especially in groundwater dating, also taking advantage of the thermonuclear experiments occurring in the 1960s around the world [20], which have given a clear marked signal of tritium increase in the environment [21].…”

Section: Introductionmentioning

confidence: 99%

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Tritium as a Tracer of Leachate Contamination in Groundwater: A Brief Review of Tritium Anomalies Method

2022

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Environmental isotopes are essential in hydrogeological studies, thanks to their contribution to the understanding of aquifers dynamics, vulnerability, water resources assessment, and management issues. The environmental isotopic approach plays a vital role in tracing the hydrological cycle and identifying various sources of contamination in the environment and gives independent information concerning what can be determined by a traditional hydrogeological study. Even in the framework of COP-26, isotopes have been indicated as fingerprints of climate change and therefore suitable for the evaluation of water balance and assessment of processes involved therein; in pollution studies they are used as fundamental support of traditional geochemical measures. Tritium, in particular, has been used since the 1960s to identify potential leaks in the containment walls of waste disposal sites, since its presence in the leachate (at very high levels in some cases) depends on the incorrect waste disposal of some peculiar items. Its use as a tracer of pollution by landfills is highlighted and emphasized by the very low concentrations of tritium in the natural environment. By comparing tritium content of leachate to that of water downflow from the waste disposal site, it is therefore possible to establish with a good success rate whether leachate have migrated or not out of the landfill, in the surrounding environment. An additional potential of tritium is to give a prompt indication of pollution risk in the environment indicating leaching even before the chemical indicator of pollution can be detected. This article wants to provide a contribution to the scientific community, collecting all the existing research in this field and providing data and benchmarks about this method, in particular stressing the role of tritium as an indicator of leachate transfer out of waste disposal sites.

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“…Other isotopes of less diffuse elements have been applied in the last decades, to add more opportunities in hydrological and hydrogeological studies [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tritium as a Tracer of Leachate Contamination in Groundwater: A Brief Review of Tritium Anomalies Method

2022

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“…[7][8][9][10][11] Iodine is a water-soluble and biophilic element, it mainly occurs as iodide, iodate and various organic associated forms in the nature. Due to its unique sources, chemical properties and long half-life, the 129 I has attracted high interests of geologists, chemists and environmental scientists for its application in dating of geological events, 12 environmental tracing, 13 geochemical cycle of iodine, 14,15 and safety assessment of nuclear facilities. 16 These works require a reliable, sensitive and rapid analytical method for determination of 129 I in different types of samples including water samples.…”

Section: Introductionmentioning

confidence: 99%

Rapid analysis of 129I in natural water samples using accelerator mass spectrometry

Zhang¹,

Hou²

2021

At.Spectrosc.

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A rapid and simple co-precipitation method for iodine separation from natural samples was developed for determination of 129 I using accelerator mass spectrometry (AMS). The method includes three steps, i.e. decomposition of organic iodine, iodine separation and target preparation using co-precipitation, and sensitive measurement of 129 I/ 127 I ratio using AMS. The recovery of iodine was higher than 90% for most natural water samples in the decomposition step using K2S2O8. Iodine in the digested sample was then co-precipitated as AgI-AgCl-Ag2SO3-Ag2SO4 with a typical recovery of 95-98%. It was observed that addition of 0.2 mg 127 I carrier can significantly improve the measurement uncertainty of low-level 129 I samples by enhancing iodine ion current. The overall recovery of iodine in the entire procedure was higher than 80%, and a detection limit of 1.0×10 5 atoms (or 2.2×10 -17 g) for 129 I was achieved. The developed method was validated by certified reference material (IAEA-418) and five types of natural water samples in comparison with results using the conventional solvent extraction method. Analytical results showed good agreement with the reference values for all samples, confirming the reliability of the developed method. The simple operation, with no need for organic solvent and small amount of iodine carrier addition make the developed method suitable for rapid and reliable determination of low level 129 I in natural water samples.

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Crystallization behavior of boron in low-temperature immobilization of iodine waste

Feng

Wei

Liu

et al. 2022

Journal of Solid State Chemistry

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Iodine-129 for determining the origin of salinity in groundwater in Pampanga, Philippines

Cited by 5 publications

References 13 publications

Tritium as a Tracer of Leachate Contamination in Groundwater: A Brief Review of Tritium Anomalies Method

Tritium as a Tracer of Leachate Contamination in Groundwater: A Brief Review of Tritium Anomalies Method

Rapid analysis of 129I in natural water samples using accelerator mass spectrometry

Crystallization behavior of boron in low-temperature immobilization of iodine waste

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