Radon and radium concentrations in drinkable water supplies of the Thu Duc region in Ho Chi Minh City, Vietnam

Le, Cong Hao; Huynh, Nguyen Phong Thu; Nguyen, Van Thang; Le, Quoc Bao

doi:10.1016/j.apradiso.2015.08.033

Cited by 39 publications

(8 citation statements)

References 11 publications

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“…Radon concentrations in all tap water samples were consistent with the USEPA's maximum contaminant level of 11.11 Bq L À1 and the drinking water radon parameter (100 Bq L À1 ) set by the EURATOM Drinking-Water Directive (USEPA 1999; Council Directive 2013/51/Euratom 2013). Radon concentrations in tap water in some countries and regions are shown in Table2, and it is obvious that the measurement results of this study are within the range of those measured in these countries and regions(Sarrou & Pashalidis 2003;Marques et al 2004;Rusconi et al 2004;Pagava et al 2008;Nita et al 2013;Ahmad et al 2015;Erdogan et al 2015;Fakhri et al 2015;Le et al 2015).3.2. Variation of radon concentration in tap water at different temperaturesIn this study, tap water samples from different residential buildings will be gradually heated to25, 40, 55, 70, 85, and 100 °C by water bath heating.…”

supporting

confidence: 69%

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

Yong

Liu

et al. 2021

Journal of Water and Health

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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.

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supporting

confidence: 69%

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

Yong

Liu

et al. 2021

Journal of Water and Health

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“…According to the WHO [13], the annual ingested volume of drinking water is assumed to be 730 L y −1 , which is equivalent to the standard WHO drinking water consumption rate of 2 L day −1 . In this study, this value was used as the annual consumption, W, in Equation ( 2), which is similar to other previous studies [6,7].…”

Section: Dose Assessmentmentioning

confidence: 97%

“…The main source of 222 Rn in water is due to α-recoil associated with the α-decay of 226 Ra in the aquifer and dissolution of 222 Rn generated in rocks [3]. In fact, 222 Rn and 226 Ra concentrations of less than a few to several thousands of Bq L −1 have been observed in several underground bodies of water around the world [4][5][6][7][8]. When these underground waters are used as drinking water, exposure due to ingestion is considered.…”

Section: Introductionmentioning

confidence: 99%

222Rn and 226Ra Concentrations in Spring Water and Their Dose Assessment Due to Ingestion Intake

Yamada

Hosoda

Tabe

et al. 2022

IJERPH

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222Rn and 226Ra concentrations of less than a few to several thousands of Bq L−1 have been observed in several underground bodies of water around the world. Although regulations for these concentrations in water have been implemented internationally, there are currently no regulations in place in Japan. However, concentrations that exceed these internationally recognized regulatory values have also been observed in Japan. In this study, concentrations in spring water in the northern part of Japan were measured and the effective dose from intake of the water was evaluated. 222Rn concentrations were measured using a liquid scintillation counter, and 226Ra concentrations were measured using a high purity germanium detector after chemical preparation. The measured 222Rn concentrations (=12.7 ± 6.1 Bq L−1) and 226Ra concentrations (<0.019–0.022 Bq L−1) did not exceed the reference values set by international and European/American organizations. A conservative estimate of the annual effective ingestion dose of 8 μSv for 222Rn and 226Ra obtained in this study is much smaller than the estimated overall annual effective dose of 2.2 mSv from natural radiation to the Japanese population. However, this dosage accounts for 8% of the WHO individual dosing criteria of 0.1 mSv/year for drinking water.

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“…Indeed, in HCMC, households which install grid-tied systems with battery backup often have specific needs like medical or professional, or they desire to have a 24/7 supply of power. Many households using grid-tied systems with battery backup also install smart systems to control their houses' security features and appliances, oftentimes remotely via smart devices (Le, 2015).…”

Section: Grid-tied Systems With Battery Backupmentioning

confidence: 99%

Constraints to the uptake of solar home systems in Ho Chi Minh City and some proposals for improvement

Baulch

Duong

2018

Renewable Energy

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This study examines the constraints to the uptake of Solar Home Systems (SHS) in Ho Chi Minh City (HCMC), Vietnam. SHS are photovoltaic systems which generate electricity for residential properties. The limited numbers of SHS installed in HCMC are mostly on-grid systems with backup batteries to supply electricity during evenings and/or power cuts.Semi-structured interviews with SHS installers, manufacturers and users, plus government agencies and technical experts identify policy constraints and the cost of systems as major constraints. Cost-benefit analysis is then used to estimate the payback period for three representative SHS. Raising residential electricity prices and introducing net metering or a feed-in tariff could dramatically shorten the payback periods for SHS. In the next five years, these and other expected changes to the electricity market will make SHS more finally attractive than at present. SHS also have the potential to generate supplement electricity during peak times, thereby diversifying and greening the energy mix. SHS therefore represent a promising technology for HCMC in the future.2

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Radon and radium concentrations in drinkable water supplies of the Thu Duc region in Ho Chi Minh City, Vietnam

Cited by 39 publications

References 11 publications

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

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

222Rn and 226Ra Concentrations in Spring Water and Their Dose Assessment Due to Ingestion Intake

Constraints to the uptake of solar home systems in Ho Chi Minh City and some proposals for improvement

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