scholarly journals Assessment of radiation dose hazards caused by radon and its progenies in tap water by the human dosimetric model

2021 ◽  
Author(s):  
Jinlong Yong ◽  
Qian Liu ◽  
Baoshan Wu ◽  
Youhua Hu ◽  
Guangwen Feng
Keyword(s):  
Public Health ◽  
Water Consumption ◽  
Radon Concentration ◽  
Residential Buildings ◽  
Tap Water ◽  
Concentration Limit ◽  
Radon Exposure ◽  
Average Value ◽  
Different Temperatures ◽  
Water Bath Heating

Abstract Radon is readily soluble in water, and radon exposure caused by household water consumption may pose a threat to public health. In this study, the radon concentration in the tap water of residential buildings was measured, and the average value was 543.33 mBq L−1, which was in line with the radon concentration limit recommended by USEPA (11.11 Bq L−1) and EURATOM (100 Bq L−1), and also within the range of the results of radon concentration measurements in tap water in other countries or regions. Through water bath heating at different temperatures, the radon retention curves of multiple groups of samples at different temperatures were fitted and analyzed. The results showed that the radon retention continued to decrease between 25 and 70 °C, remained stable between 70 and 85 °C, and then continued to decline slowly. Combined with the measurement results, the effective doses of α- and β-particles emitted by 222Rn and its progenies to residents respiratory and alimentary tissues and organs were calculated using the computational model provided by ICRP under two typical water scenarios of shower and drinking water, and the results show that radon exposure caused by normal water consumption will not pose a serious threat to public health.

scholarly journals Spatio-Temporal Mapping of Water Consumption at Public Institutions: Case of the United Arab Emirates University

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
M. M. Yagoub ◽  
Tareefa AlSumaiti ◽  
Latifa Ebrahim ◽  
Yaqein Ahmed ◽  
Rauda Abdulla
Keyword(s):  
United Arab Emirates ◽  
Water Consumption ◽  
Water Conservation ◽  
Residential Buildings ◽  
Tap Water ◽  
Public Institutions ◽  
Least Square ◽  
United Arab Emirates University ◽  
The University ◽  
Water Issues

<p><strong>Abstract.</strong> The United Arab Emirates (UAE) faces water scarcity. Yet, the UAE is one of the highest countries in the per capita water consumption. The United Arab Emirates University (UAEU) is one of the biggest public institutions in the country. On average, the water costs the university annually around two million dirhams. In this study, indoor water consumption at the UAEU is assessed for the period 2016&amp;ndash;2017. Geographic Information System (GIS) is utilized to answer where water is highly consumed within the university (hot spots), when (time), who consume it, why (causes), and how to minimize consumption. It assembles diverse data reside at various departments to gain a better knowledge about the broad patterns of water consumption in the university. The assumption made here is that water consumption is directly proportional to population density and less during winter. The highest water consumption is found at the College of Information Technology (CIT) and this is due to its size and heterogeneity of its activities. The relationship between water consumption and number of students is modeled using least square. The results indicated low correlation between water consumption and number of students. This may be due to the centralized usage of buildings and movement of students between buildings. Temporal variation showed sharp decrease during July of 2016 and 2017 irrespective of the building type/size and this is associated with summer holidays. The hypothesis of activity-driven consumption showed that the highest water consumption is found at residential buildings due to the longer stay time at hostels. The library showed consistent low water consumption. It is interesting to deduce the library usage while investigating water consumption, but it is a lesson that water consumption could be used as a proxy to reveal number of users at buildings. The water consumption at UAEU is benchmarked with other institutes in UAE and abroad. The result from this study identified sites with the highest water consumption and this could be used to adapt water conservation techniques at these sites. A survey was conducted to understand the students’ water consumption behavior, know their willingness to use water conservation methods, and measure their awareness level related to water issues in UAE. The results revealed that half of the respondents are not aware of the water issues. Majority of respondents prefer to drink bottled water than tap water. Majority of respondents are not willing to use grey water or urinals as ways to conserve water due to the lack of knowledge and some physiological reasons. Yet, they are willing to take course designed to teach them how to conserve water and to participate in competitions that reward them for having lower water consumption at hostels.</p>

scholarly journals Measurement of radon gas concentration in water and soil samples in AL-Najaf governorate by using nuclear track detector (CR-39)

2015 ◽  
Vol 12 (3) ◽  
pp. 603-610
Author(s):  
Baghdad Science Journal
Keyword(s):  
Radon Concentration ◽  
Tap Water ◽  
Track Detector ◽  
Soil Samples ◽  
Exhalation Rate ◽  
Nuclear Track Detector ◽  
Gas Concentration ◽  
Average Value ◽  
Radon Gas

The radon gas concentration in environmental samples soil and water of selected regions in Al-Najaf governorate was measured by using alpha-emitters registrations which are emitted form radon gas in (CR-39) nuclear track detector. The first part is concerned with the determination of radon gas concentration in soil samples, results of measurements indicate that the highest average radon concentration in soil samples was found in (Al-Moalmen) region which was (100.0±7.0 Bq/m3), while the lowest average radon concentration was found in (Al-Askary) region which was (38.5±4.7 Bq/m3), with an average value of (64.23±14.9 Bq/m3) ,the results show that the radon gas concentrations in soil is below the allowed limit from (ICRP) agency which is (200 Bq/m3), while the radon exhalation rate (RER) ranged from (35.23-91.52 µBq/m2h), and average value which was (58.77±13.6 µBq/m2h). The second part is concerned with the determination of radon gas concentration in samples of tap water obtained from networks in dwellings in Al-Najaf governorate, the results indicate that the highest average radon concentration in water samples was found in (Meassan) region which was (0.59±0.08 Bq/L), while the lowest average radon concentration was found in (Al-Jamhorah) region which was (0.16±0.04 Bq/L), with an average value of (0.36±0.1 Bq/L), the present results show that the radon gas concentrations in tap water is below the allowed limit from (ICRP) agency which is (0.5994 Bq/L), while the radon exhalation rate (RER) ranged from (2.15-0.58 ?Sv/y), and average value which was (1.28±0.31 ?Sv/y).

Some Experimental Discussion of Accuracies in Quantitative Virus Assessment for Water Supply

1985 ◽  
Vol 17 (10) ◽  
pp. 127-138
Author(s):  
Hisashi Sumitomo
Keyword(s):  
Public Health ◽  
Water Supply ◽  
Organic Compounds ◽  
Lake Biwa ◽  
Tap Water ◽  
Statistical Procedure ◽  
Statistical Nature ◽  
The Public ◽  
Public Risk ◽  
Precise Assessment

Chlorination has been believed to be the best sterilization method in water supply engineering for many years. However, the recent carcinogenic problem of trihalomethanes (THM) formed from organic compounds by chlorination requires us to assess the public health risk of THM. The author tried an assessment of a suitable chlorination technique considering both the effects of THM and viruses on human health, using Lake Biwa as a representative example of a water resource in Japan. Statistical handling of data was revealed to be important because of the statistical nature of the data. In other words, since both concentrations are very low in tap water, we need to quantify both the effects and concentrations with probabilities. In the first part of this paper, a statistical procedure and numerical results of the assessment of virus and THM risks are shown. In the second part some results of accuracies in virus experiments are briefly shown. These experiments concerning statistical problems are particularly important for more precise assessment of the public risk of viruses in tap water.

scholarly journals Examining Recent Trends in the Racial Disparity Gap in Tap Water Consumption: NHANES 2011–2018

2021 ◽  
pp. 1-20
Author(s):  
Asher Y. Rosinger ◽  
Anisha I. Patel ◽  
Francesca Weaks
Keyword(s):  
Water Consumption ◽  
Tap Water ◽  
Ethnic Disparities ◽  
Prevalence Ratio ◽  
Bottled Water ◽  
Water Crisis ◽  
Cross Sectional ◽  
The Us ◽  
Recent Trends ◽  
Nationally Representative

Abstract Objective As tap water distrust has grown in the US with greater levels among Black and Hispanic households, we aimed to examine recent trends in not drinking tap water including the period covering the US Flint Water Crisis and racial/ethnic disparities in these trends. Design Cross-sectional analysis. We used log-binomial regressions and marginal predicted probabilities examined US nationally-representative trends in tap and bottled water consumption overall and by race/ethnicity. Setting The National Health and Nutrition Examination Survey data, 2011–2018. Participants Nationally-representative sample of 9,439 children aged 2-19 and 17,268 adults. Results Among US children and adults, respectively, in 2017-2018 there was a 63% (adjusted prevalence ratio [PR]:1.63, 95%CI: 1.25-2.12, p<0.001) and 40% (PR:1.40, 95%CI: 1.16-1.69, p=0.001) higher prevalence of not drinking tap water compared to 2013-2014 (pre-Flint Water Crisis). For Black children and adults, the probability of not drinking tap water increased significantly from 18.1% (95%CI: 13.4-22.8) and 24.6% (95%CI: 20.7-28.4) in 2013–14 to 29.3% (95%CI: 23.5-35.1) and 34.5% (95%CI: 29.4-39.6) in 2017–2018. Among Hispanic children and adults, not drinking tap water increased significantly from 24.5% (95%CI: 19.4-29.6) and 27.1% (95%CI: 23.0-31.2) in 2013-14 to 39.7% (95%CI: 32.7-46.8) and 38.1% (95%CI: 33.0-43.1) in 2017-2018. No significant increases were observed among Asian or white persons between 2013-14 and 2017-18. Similar trends were found in bottled water consumption. Conclusions This study found persistent disparities in the tap water consumption gap from 2011–2018. Black and Hispanics’ probability of not drinking tap water increased following the Flint Water Crisis.

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.

scholarly journals Dental Fluorosis in Children from Aguascalientes, Mexico: A Persistent Public Health Problem

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1125
Author(s):  
Osiel González Dávila
Keyword(s):  
Public Health ◽  
Health Problem ◽  
Dental Fluorosis ◽  
Tap Water ◽  
Public Health Problem ◽  
Normal Weight ◽  
Fluoride Removal ◽  
Public Elementary Schools ◽  
Ordered Logistic Regression ◽  
Guideline Value

This paper estimates the prevalence and severity of dental fluorosis among participants in the first wave of The Aguascalientes Longitudinal Study of Child Development (EDNA). The analytical sample includes 1052 children in 100 public elementary schools. Dental fluorosis is determined using the Modified Dean’s Index. There is a 43% general dental fluorosis prevalence, and the estimated Community Fluorosis Index is 0.99. Five municipalities report average groundwater fluoride concentrations above the official Mexican guideline value of 1.5 mg/L. In those municipalities, there is a 50% average dental fluorosis prevalence. An ordered logistic regression analysis indicates that obesity in participants increases the likelihood of suffering more severe dental fluorosis symptoms compared with normal-weight participants (OR = 1.62, p < 0.05). Households consuming tap water are more likely to have children suffering more severe dental fluorosis symptoms (OR = 1.63, p < 0.05). Children aged 8 years are more likely to present more severe dental fluorosis symptoms than their peers aged 7 years (OR = 1.37, p < 0.05). Dental fluorosis will persist as a public health problem in Aguascalientes State unless appropriate technologies for fluoride removal from water are installed and operated.

Water consumption in public schools for the city of Bologna, Italy

2013 ◽  
Vol 13 (2) ◽  
pp. 257-264 ◽  
Author(s):  
Marco Farina ◽  
Marco Maglionico ◽  
Marco Pollastri ◽  
Irena Stojkov
Keyword(s):  
Public Schools ◽  
Water Consumption ◽  
Residential Buildings ◽  
Secondary School Student ◽  
Educational Interventions ◽  
Daily Basis ◽  
Published Data ◽  
Older Students ◽  
Consumption Data ◽  
The City

For most buildings considered to be of a public non-residential type there are insufficient published data to establish and compare the theoretical standards with actual consumption data. Therefore, water consumption per user in non-residential buildings is still a very complicated issue for engineers and designers involved in analysing water demand and water management. This is why linking water consumption and school occupancy is the goal of this paper, trying to set the basis for further design, conservation and educational interventions on this topic. This research integrates quantitative data of water consumption, through water metering and analysis, and historical data about users in buildings. We focused on consumptions for four types of schools: nurseries (0–3-year-old children), kindergartens (3–6 years), elementary schools (6–11 years) and secondary 1st grade schools (11–14 years). The results are that the rational basic demand for water is estimated as 48.8 l per pre-school student per day and 18.7 l per elementary/secondary school student per day. Therefore we found that younger children use more water on a daily basis than older ones, probably because they need more services, such as laundries and kitchens, whereas older students consume water mainly in restrooms.

Radon concentration in compressed natural gas and liquefied petroleum gas and its release range in residential houses

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Akbar Abbasi ◽  
Hesham M.H. Zakaly ◽  
Mahmoud M. Hessien
Keyword(s):  
Natural Gas ◽  
Radon Concentration ◽  
Concentration Distribution ◽  
Measurement Techniques ◽  
Concentration Measurement ◽  
Liquefied Petroleum Gas ◽  
Compressed Natural Gas ◽  
Radon Exposure ◽  
Active Method

Abstract Radon (222Rn) exposure in the environment is an important issue, and many pathways exist for radon exposure to humans. One of these pathways is 222Rn release through the consumption of natural gas. The issues of 222Rn concentration measurement techniques and worldwide concentration distribution were reviewed in natural gas, with emphasis on performing an active method to determine 222Rn concentration in LPG and CNG gases used in Cyprus. The obtained results were compared with 222Rn concentration in natural gas worldwide and UNSCEAR reports. The average 222Rn concentration value in LPG gas was observed higher than CNG gas. Also, the 222Rn concentration in LPG and CNG gases was less than the UNSCEAR reported value.

scholarly journals Performance Assessment of Public Health Center Madising Na Mario Parepare, South Sulawesi, Indonesia

2019 ◽  
Vol 3 (1) ◽  
pp. 30
Author(s):  
Ajeng Dyah Pythaloka ◽  
Muhammad Yusri Abadi ◽  
Darmawansyah Darmawansyah
Keyword(s):  
Public Health ◽  
Health Center ◽  
Health Centers ◽  
Average Performance ◽  
Public Health Center ◽  
Average Value ◽  
Quality Health ◽  
Research Achievement ◽  
Quantitative Descriptive ◽  
Performance Results

Implement health efforts both public health efforts are first rate and first rate individual health efforts are needed health center management be integrated and continuous in order to produce the performance of Public Health Center effective and efficient. This study aims to find out about the picture of the level of achievement of performance results pertaining to quality health center health center services, management of health centers and health care Public Health Center Madising Na Mario Pare-pare. This research method is quantitative descriptive method, whereby it purports to describe the level of achievement of the performance results of health centers. From the research achievement of quality performance owned health center services obtained an average value of 9,7 performance with good performance categories. Public Health Center management obtained an average performance score of 10 with a good performance categories. Health services obtained the value of the average performance of 70,9% with less performance categories. Therefore, efforts to improve the performance of health centers needed professional human resources and improvement of health facilities, especially the budget required.

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