Development and calibration of a portable radon sampling system for groundwater 222Rn activity concentration measurements

Lucas, Fabio de Oliveira; Oliveira, Igor José Chaves de; Ribeiro, Fernando Brenha

doi:10.1016/j.jenvrad.2009.06.015

Cited by 5 publications

(2 citation statements)

References 19 publications

(14 reference statements)

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“…Elevated water level of Rn found at the western part of the Lake Volvi (Migdonia basin in Northern Greece), due probably to the local intense tectonism (Savidou et al, 2001). Lucas Fde et al (2009) found seasonal variation in groundwater drawn from two wells drilled on metamorphic rocks exposed at Eastern São Paulo State, Brazil and also high differences between two well water concentrations, 374 Bq/dm(3) in one well and about 1275 Bq/dm(3) in the other one.…”

Section: Influencing Factorsmentioning

confidence: 97%

Factors Influencing Radon (<sup>222</sup>Ra) Levels of Water: An International Comparison

Nagaraja¹,

Sukumar²,

Dhanalakshmi³

et al. 2019

GEP

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Radon levels were measured in 59 water samples of rural and urban places of Bangalore city following procedures of standardized techniques. Though water level of radon above 100 Bqll −1 of WHO is ascribed to causes of lung cancer and leukaemia, very low levels were found in different urban and rural places, but urban-rural gradient observed significantly higher urban levels than rural levels. Correlation between depth of water sampled and radon levels estimated indicates that in urban places, lower water depth is related to higher radon levels, while it is vice versa in rural. It is due to more water use for rural agriculture and more urban water pollution and granite quarries. In comparison to other countries, it is observed that water radon levels are at wide ranges from the lowest to the highest estimated with different techniques and differ due to types of water, soil, rocks and sampling season.

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Section: Influencing Factorsmentioning

confidence: 97%

Factors Influencing Radon (<sup>222</sup>Ra) Levels of Water: An International Comparison

Nagaraja¹,

Sukumar²,

Dhanalakshmi³

et al. 2019

GEP

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“…Liquid scintillation is commonly used in the laboratory to discriminately measure 222 Rn activity concentrations in water [5,6]. In an alternative method, a water sample that was carefully collected in a glass bottle is connected to a radon-in-air monitor in a closed air-loop.…”

Section: Instructionmentioning

confidence: 99%

Equilibration correction of temporal measurements for sudden²²²Rn concentration changes

et al. 2016

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A: 222 Rn and 220 Rn can be used as tracers of groundwater or submarine springs, and 222 Rn in water also could indicate indoor radon problems in some regions. The half-life of 222 Rn is long enough that its concentration may remain significant during transit over relatively long distances, while that of 220 Rn is not. Prior research revealed that it took about 15 min for the radon to achieve gas equilibrium at a water flow rate of 17.5 L min −1 , which is approximately equivalent to the time required for the 222 Rn-218 Po pair to approach radioactive equilibrium and is limiting in terms of measurements of sudden radon concentration change. In this work, an algorithm is applied to improve the continuous tracing of radon concentrations in the field environment. Results of a laboratory experiment analyzed applying the analysis method illustrated its ability to allow immediate identification of sharp concentration increases. In this paper we find that a precipitous drop in radon concentrations lead to improper corrected values as the result of measurement uncertainties prior to the drop, and a method using zero instead negative values for reducing the uncertainties under such condition also is proposed.

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Environmental Liquid Scintillation Analysis

Passo¹,

Carter²

2012

Handbook of Radioactivity Analysis

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Development and calibration of a portable radon sampling system for groundwater 222Rn activity concentration measurements

Cited by 5 publications

References 19 publications

Factors Influencing Radon (<sup>222</sup>Ra) Levels of Water: An International Comparison

Factors Influencing Radon (<sup>222</sup>Ra) Levels of Water: An International Comparison

Equilibration correction of temporal measurements for sudden²²²Rn concentration changes

Environmental Liquid Scintillation Analysis

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Development and calibration of a portable radon sampling system for groundwater 222Rn activity concentration measurements

Cited by 5 publications

References 19 publications

Factors Influencing Radon (&lt;sup&gt;222&lt;/sup&gt;Ra) Levels of Water: An International Comparison

Factors Influencing Radon (&lt;sup&gt;222&lt;/sup&gt;Ra) Levels of Water: An International Comparison

Equilibration correction of temporal measurements for sudden222Rn concentration changes

Environmental Liquid Scintillation Analysis

Contact Info

Product

Resources

About

Factors Influencing Radon (<sup>222</sup>Ra) Levels of Water: An International Comparison

Factors Influencing Radon (<sup>222</sup>Ra) Levels of Water: An International Comparison

Equilibration correction of temporal measurements for sudden²²²Rn concentration changes