scholarly journals Research on the Conversion Coefficient for Measuring Radon Concentration in Water Based on Bubbling Method

2021 ◽  
Author(s):  
Tao Hu ◽  
Zhongkai Fan ◽  
Fen Lin ◽  
Yixiang Mo ◽  
Ruomei Xie ◽  
...  
Keyword(s):  
Drinking Water ◽  
Radon Concentration ◽  
Conversion Coefficient ◽  
Indoor Radon ◽  
Sample Volume ◽  
National Standard ◽  
Measuring Time ◽  
Measurement Condition ◽  
Sample Bottle ◽  
Water Measurement

Abstract Radon is soluble in water, and the radon in drinking water is one of the sources of indoor radon. The China national standard for drinking water (GB5749-2006) indicates that the radon concentration in drinking water cannot be higher than 300pCi/L. The widely used method for measuring radon concentration in water is to use the RAD7 and the H2O accessory which provided by the Durridge Company for bubbling measurement. There are two kind sample bottles: 40ml and 250ml; the measurement steps: bubbling for 5 minutes, and measuring for 20 minutes. For the 40ml sample volume the conversion coefficient is around 25. For the 250ml sample volume the conversion coefficient is around 4. Since the price of the accessory is more than one thousand dollars, and the drying tube of the accessory is small, it needs to be replaced after each measurement which makes the operation is troublesome. We used a big drying tube to perform the radon concentration in water measurement. A new model for description the radon concentration in the gas circuit is proposed, and the conversion coefficient in any measurement condition is obtained. Any volume of sample bottle and drying tube can be used, selecting the suitable bubbling time and measuring time, the radon concentration in water can be obtained.

Distribution characteristics on indoor radon concentration of multiple-use facilities in Gwangju area

2019 ◽  
Vol 18 (2) ◽  
pp. 177-184 ◽  
Author(s):  
Min-jin Kim ◽  
Sang-su An ◽  
Min-cheol Cho ◽  
Se-il Park ◽  
Jong-min Kim ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Indoor Radon ◽  
Distribution Characteristics ◽  
Multiple Use ◽  
Indoor Radon Concentration

scholarly journals A new approach to radon temporal correction factor based on active environmental monitoring devices

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
T. Dicu ◽  
B. D. Burghele ◽  
M. Botoş ◽  
A. Cucoș ◽  
G. Dobrei ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Residential Buildings ◽  
Indoor Radon ◽  
Smart Device ◽  
Correction Factors ◽  
Indoor Radon Concentration ◽  
Radon Measurements ◽  
The Impact ◽  
Monitoring Devices ◽  
Temporal Correction

AbstractThe present study aims to identify novel means of increasing the accuracy of the estimated annual indoor radon concentration based on the application of temporal correction factors to short-term radon measurements. The necessity of accurate and more reliable temporal correction factors is in high demand, in the present age of speed. In this sense, radon measurements were continuously carried out, using a newly developed smart device accompanied by CR-39 detectors, for one full year, in 71 residential buildings located in 5 Romanian cities. The coefficient of variation for the temporal correction factors calculated for combinations between the start month and the duration of the measurement presented a low value (less than 10%) for measurements longer than 7 months, while a variability close to 20% can be reached by measurements of up to 4 months. Results obtained by generalized estimating equations indicate that average temporal correction factors are positively associated with CO2 ratio, as well as the interaction between this parameter and the month in which the measurement took place. The impact of the indoor-outdoor temperature differences was statistically insignificant. The obtained results could represent a reference point in the elaboration of new strategies for calculating the temporal correction factors and, consequently, the reduction of the uncertainties related to the estimation of the annual indoor radon concentration.

Indoor radon concentration in the rural dwellings of Chhattisgarh state (India)

2006 ◽  
Vol 119 (1-4) ◽  
pp. 434-437 ◽  
Author(s):  
M. S. K. Khokhar ◽  
R. S. Kher ◽  
V. B. Rathore ◽  
T. V. Ramachandran
Keyword(s):  
Radon Concentration ◽  
Indoor Radon ◽  
Indoor Radon Concentration

Radon concentration in drinking water in villages nearby Rafsanjan fault and evaluation the annual effective dose

2014 ◽  
Vol 302 (3) ◽  
pp. 1167-1176 ◽  
Author(s):  
Mohammad Malakootian ◽  
Zahra Khashi ◽  
Farnaz Iranmanesh ◽  
Mojtaba Rahimi
Keyword(s):  
Drinking Water ◽  
Effective Dose ◽  
Radon Concentration ◽  
Annual Effective Dose

scholarly journals Seasonal indoor radon studies in buildings of Accra Metropolis of Greater Accra region of Ghana

2018 ◽  
Vol 53 (3) ◽  
pp. 199-206 ◽  
Author(s):  
F. Otoo ◽  
E.O. Darko ◽  
M. Garavaglia ◽  
C. Giovani ◽  
S. Pividore ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Rainy Season ◽  
Indoor Radon ◽  
Dry Season ◽  
Strong Positive Correlation ◽  
Cumulative Frequency Distribution ◽  
Indoor Radon Concentration ◽  
Kolmogorov Smirnov ◽  
Greater Accra Region ◽  
Action Levels

Indoor radon concentration for annual, rainy and dry season have been studied in 228 buildings which includes bedroom, kitchen, sitting room, laboratories and offices in Accra metropolis of Greater Accra of Ghana. The passive radon CR-39 SSNTD was used for this study. The cumulative frequency distribution, normalizing Q-Q plots, Kolmogorov-Smirnov and Shapiro-Wilk statistical test showed that the result of both workplaces and dwellings are not normally distributed. The strong positive correlation between the two seasons occurred at 95% confidence level with 2 tailed. The rainy season recorded highest coefficient variation of r2 = 0.982. Statistical analysis of median (39.3), AM (103.4), GM (57.9) and GSD (3.2) for rainy season were greater than that of the dry season of median (26.9), AM (88.2), GM (49.2) and GSD (2.8) respectively. Rainy season was found to contain high radon concentrations than the dry season for all the studied locations. In general, workplace had radon concentration far greater than dwellings. The results obtained from this study ranged between 13.6 to 533.7 Bq/m3, out of which 9.6%, 12.7% and 3.5% were found to be greater than action levels proposed by WHO, EC and ICRP.

Studies on radon concentration in drinking water around Hemavathi river basin, Karnataka State, India

2017 ◽  
Vol 314 (1) ◽  
pp. 321-331 ◽  
Author(s):  
R. S. Niranjan ◽  
C. Ningappa ◽  
T. Yashaswini ◽  
N. A. Chamaraja ◽  
D. R. Rangaswamy ◽  
...  
Keyword(s):  
Drinking Water ◽  
River Basin ◽  
Radon Concentration ◽  
Karnataka State

scholarly journals Drinking Water Fluoride Levels for a City in Northern Mexico (Durango) Determined Using a Direct Electrochemical Method and Their Potential Effects on Oral Health

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Nelly Molina Frechero ◽  
Leonor Sánchez Pérez ◽  
Enrique Castañeda Castaneira ◽  
Anastasio Oropeza Oropeza ◽  
Enrique Gaona ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Dental Fluorosis ◽  
Fluoride Concentration ◽  
Mean Value ◽  
National Standard ◽  
Preventative Measures ◽  
The Government ◽  
The City

Fluoride is ingested primarily through consuming drinking water. When drinking water contains fluoride concentrations >0.7 parts per million (ppm), consuming such water can be toxic to the human body; this toxicity is called “fluorosis.” Therefore, it is critical to determine the fluoride concentrations in drinking water. The objective of this study was to determine the fluoride concentration in the drinking water of the city of Durango. The wells that supply the drinking water distribution system for the city of Durango were studied. One hundred eighty-nine (189) water samples were analyzed, and the fluoride concentration in each sample was quantified as established by the law NMX-AA-077-SCFI-2001. The fluoride concentrations in such samples varied between 2.22 and 7.23 ppm with a 4.313 ± 1.318 ppm mean concentration. The highest values were observed in the northern area of the city, with a 5.001 ± 2.669 ppm mean value. The samples produced values that exceeded the national standard for fluoride in drinking water. Chronic exposure to fluoride at such concentrations produces harmful health effects, the first sign of which is dental fluorosis. Therefore, it is essential that the government authorities implement water defluoridation programs and take preventative measures to reduce the ingestion of this toxic halogen.

scholarly journals Measurement of radon concentration in drinking water and estimation of radiation dose to the publics of Hassan city, Karnataka, India

2018 ◽  
Vol 41 (3) ◽  
pp. 132
Author(s):  
E Srinivasa ◽  
DR Rangaswamy ◽  
S Suresh ◽  
SR Nagabhushana ◽  
J Sannappa ◽  
...  
Keyword(s):  
Drinking Water ◽  
Radiation Dose ◽  
Radon Concentration

scholarly journals Long-Term Impacts of Weather Conditions on Indoor Radon Concentration Measurements in Switzerland

Atmosphere ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 92
Author(s):  
Joan Frédéric Rey ◽  
Stéphane Goyette ◽  
Mauro Gandolla ◽  
Martha Palacios ◽  
Fabio Barazza ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Indoor Radon ◽  
Weather Conditions ◽  
Indoor Environments ◽  
Indoor Radon Concentration ◽  
Prone Area ◽  
Building Characteristics ◽  
Study Sites ◽  
Radon Measurements

Radon is a natural and radioactive gas that can accumulate in indoor environments. Indoor radon concentration (IRC) is influenced, among other factors, by meteorology, which is the subject of this paper. Weather parameters impact indoor radon levels and have already been investigated, but rarely in Switzerland. Moreover, there is a strong need for a better understanding of the radon behaviour inside buildings in Switzerland for public health concerns as Switzerland is a radon prone area. Based on long-term, continuous, and hourly radon measurements, radon distributions classified according to different weather event definitions were investigated and then compared at three different study sites in Western Switzerland. Outdoor temperature influences the most indoor radon, and it is globally anti-correlated. Wind influences indoor radon, but it strongly depends on intensity, direction, and building characteristics. Precipitation influences periodically indoor radon levels relatively to their intensity. Atmospheric pressure and relative humidity do not seem to be huge determinants on IRC. Our results are in line with previous findings and provide a vivid example in Western Switzerland. This paper underlines the different influence complexities of radon, and the need to communicate about it within the broader public and with construction professionals, to raise awareness.

Sign in / Sign up

Export Citation Format

Share Document