A detailed examination of the chemical, hydrological, and geological properties influencing the mobility of {sup 222}radon and parent radionuclides in groundwater

Sexsmith, K.S.

doi:10.2172/674898

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…On the other hand, Sexsmith (1996) mentioned that iron and manganese oxides are important sorbents for uranium. The most common occurrence of elevated Ra throughout the USA reported by Szabo et al (2012) occurred in anoxic water with high concentrations of Fe or Mn, and in some places, where high concentrations of the competing ions Ca, Mg, Ba and Sr, and occasionally of dissolved solids, K, SO 4 and HCO 3 was observed.…”

Section: Rn Variability With Depthmentioning

confidence: 99%

Variability of 222Rn in the sandy aquifer of Buenos Aires coast

Carretero

Rapaglia²,

Capítulo

et al. 2021

Environ Earth Sci

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222 Rn is widely used as a tracer to detect and calculate submarine groundwater discharge in coastal zones, rivers and lakes. Relatively few investigations, however, have used this element for other applications in hydrogeology. We analyze the relationship between 222 Rn activity in groundwater and variations in the water cycle in the sandy aquifer of Buenos Aires coast, Argentina. Groundwater levels, electrical conductivity and 222 Rn activity were measured in situ in wells in March 2016 and November 2018, representing two different hydrological conditions. Groundwater flow maps were drawn, hydrological gradients and flux velocities were calculated. An inverse correlation between 222 Rn activity and recharge conditions was found. Lower water surplus shows higher 222 Rn activity and vice versa, potentially due to dilution of high 222 Rn activity water with 'newer' lower activity recent recharge. A variability in 222 Rn spatial distribution was identified along the sand dune barrier. A correlation between 222 Rn and groundwater electrical conductivity was not observed. Keywords Radon • Hydrological cycle • Sand dune barrier • Buenos AiresThis article is a part of the Topical Collection in Environmental Earth Sciences on "Advances in Environmental Geochemistry" guest edited by Dr.

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Section: Rn Variability With Depthmentioning

confidence: 99%

Variability of 222Rn in the sandy aquifer of Buenos Aires coast

Carretero

Rapaglia²,

Capítulo

et al. 2021

Environ Earth Sci

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“…As mentioned before, when a microbubble reaches the water table boundary it bursts and deposits small aerosols on the walls of faults and cracks. Since the water table changes over geological time, this can explain why the surfaces of the cracks have high concentrations of trace elements [24]. However, microbubbles cannot explain the transport above the water-table, the presence of small aerosols in caves and mines [2], the particles that are collected past the filters in adsorbers, and certainly not the particles collected in adsorbers at 1 m heights regardless of the weather conditions [8,9,16].…”

Section: How Others Are Explaining These Anomaliesmentioning

confidence: 99%

Localization of a bound particle outside the potential well

Holub

Smrz²

2002

Can. J. Phys.

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We describe a simple effect predicted by standard quantum mechanics concerning a particle bound in a potential well brought to the zero-energy state by deformation of the well. When the effect takes place within a crack with impermeable walls the probability of localization of the particle reaches its maximum near the end of the crack. The wave function describing the bound particle may thus decohere far from the potential well. There are numerous instances of experimental data, gathered mostly by geochemists and other scientists over the last several decades, that are anomalous and defy all attempts to explain them by means of classical chemistry and physics. The common attribute of these data is a strange transport of particles over large distances that may be caused by the quantum effect described in the first part of the paper. The motivation for writing this paper is our hope to stimulate interest and critical testing of such an hypothesis. PACS Nos.: 03.65, 82.90, 91.90 Résumé : Nous décrivons un effet simple prévu par la mécanique quantique standard impliquant une particule liée dans un puits de potentiel et amenée à l'état d'énergie nulle par une déformation du puits. Lorsque cet effet se produit dans une fente avec des murs imperméables, la probabilité de localization de la particule atteint son maximum près du bord de la fente. La fonction d'onde décrivant la particule liée peut alors perdre sa cohérence à l'extérieur du puits. Il y a une foule d'exemples expérimentaux, recueillis surtout par des géochimistes et d'autres scientifiques depuis des décennies, qui sont anomaux et défient toutes les tentatives d'explication via les théories physiques et chimiques classiques. Le point commun de ces observations est un transport étrange de particules sur de grandes distances qui pourrait être causés par l'effet quantique décrit dans la première partie du papier. En écrivant ce papier, nous espérons susciter de l'intérêt et amener des chercheurs à tester cette hypothèse de façon critique.[Traduit par la Rédaction]

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A detailed examination of the chemical, hydrological, and geological properties influencing the mobility of {sup 222}radon and parent radionuclides in groundwater

Cited by 2 publications

References 26 publications

Variability of 222Rn in the sandy aquifer of Buenos Aires coast

Variability of 222Rn in the sandy aquifer of Buenos Aires coast

Localization of a bound particle outside the potential well

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