Groundwater radon, radium and uranium concentrations in Região dos Lagos, Rio de Janeiro State, Brazil

Almeida, Rodrigo Menezes Raposo de; Lauria, Dejanira da Costa; Ferreira, Ana Cristina de Melo; Šráček, Ondra

doi:10.1016/j.jenvrad.2003.10.006

Cited by 70 publications

(20 citation statements)

References 16 publications

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“…Some authors have found that radon concentrations in rock aquifers are characterized by their variability. Thus, 222 Rn in groundwater varies from 1 to 50 Bq/L in aquifers with sedimentary rocks, from 100 to 50,000 Bq/L in aquifers with crystalline rocks, and from 10 to 30,000 Bq/L in wells of alluvial deposits [5,[37][38][39]. The study area is characterized by sedimentary rocks such as lutite-sandstone and sandstone-conglomerate.…”

Section: Discussionmentioning

confidence: 99%

“…The 226 Ra mobility is strongly influenced by both high T and/or high salt contents, as well as the redox state (lower oxygen concentrations). In saline groundwater, 226 Radium is more mobile due to ion exchange competition with other major cations present in water [39,44]. Water from the aquifer under study is classified predominantly as Calcium-sulfated and Sodium-sulfated [14].…”

Section: Discussionmentioning

confidence: 99%

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Hydrochemistry and 222Rn Concentrations in Spring Waters in the Arid Zone El Granero, Chihuahua, Mexico

et al. 2017

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Abstract:Water in arid and semi-arid environments is characterized by the presentation of complex interactions, where dissolved chemical species in high concentrations have negative effects on the water quality. Radon is present in areas with a high uranium and radium content, and it is the main contributor of the annual effective dose received by humans. The objective of this study was to evaluate concentrations of 222 Rn and the water quality of spring waters. Water was classified as calcium sulfated and sodium sulfated. Most of the water samples with high radon concentrations presented higher concentrations of sulfates, fluorides, and total dissolved solids. 222 Rn concentrations may be attributed to possible enhancement of 226 Ra due to temperature and salinity of water, as well as evaporation rate. In 100% of the sampled spring waters the 222 Rn levels exceeded the maximum acceptable limit which is proposed by international institutions. Aridity increases radiological risk related to 222 Rn dose because spring waters are the main supply source for local populations. The implementation of environmental education, strategies, and technologies to remove the contaminants from the water are essential in order to reduce the health risk for local inhabitants.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Hydrochemistry and 222Rn Concentrations in Spring Waters in the Arid Zone El Granero, Chihuahua, Mexico

et al. 2017

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“…우라늄은 지하수의 pH에 대하 여 매우 의존적이며 다양한 이산화탄소 분압, 우라늄 농 도, 착화합물을 형성하는 리간드 등에 의해서도 민감한 것 으로 알려져 있다 (Pabalan and Turner, 1997;Katsoyiannis et al, 2006). 인체에 유입되는 우라늄의 가장 지배적인 형태는 중탄산염 착화합물(UO 2 (HCO 3 ) 2 )으로 알려져 있으 며 (Hodge, 1973;Almeida et al, 2004), 인체 내 농도 가 높을 때 신장장애를 초래하는 것으로 보고되고 있고 (CEPA, 2001), 우라늄이 뼈에 축적되면 골격계 암을 유 발할 수 있는 것으로 알려졌다 (Shin et al, 2002). 우라 늄 평균 하루 섭취량은 먹는물 3.7 µg/day, 음식물 (Briggs et al, 1982;Burken and Schnoor, 1997;Dietz and Schnoor, 2001;McFarland et al, 1990;Thompson et al, 1998).…”

Section: 한이경·김세윤·허효진·이민희unclassified

Application of Rhizofiltration using Lettuce, Chinese Cabbage, Radish Sprouts and Buttercup for the Remediation of Uranium Contaminated Groundwater

Han¹,

Kim²,

Heo³

et al. 2014

Journal of Soil and Groundwater Environment

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Lab scale rhizofiltration by using four plants was performed to investigate the uranium removal efficiency from groundwater. Lettuce (Lactuca sativa L.), Chinese cabbage (Brassica campestris L.), radish sprouts (Raphanus sativus L.) and buttercup (Oenanthe javanica) were cultivated during 3 weeks in the phytotron. Glass jar (12 cm × 12 cm × 8 cm for each), containing 350 ml of the artificially uranium contaminated solution was used for 72 hours of the rhizofiltration. In experiments with different initial uranium concentration (18.00 µg/L, 31.00 µg/L, 84.00 µg/L and 116.00 µg/L) in solution, more than 70% of the initial uranium were removed by using lettuce, Chinese cabbage and radish sprouts and the residual uranium concentration in solution maintained lower than USEPA water tolerance limit (30 µg/L). From the rhizofiltration experiments at various pH conditions, the highest uranium removal for all four plants was acquired at pH 3 in solution. Rhizofiltration experiments testing two field samples of groundwaters having high uranium concentrations (86.00 µg/L and 173.00 µg/L) were duplicated and more than 83% of the initial uranium were removed from the groundwater within 72 hours of rhizofiltration by using radish sprouts, which, suggests that the rhizofiltration can be a useful process to remediate uranium contaminated groundwater in the field. After the rhizofiltration experiment, the SEM and EDS analyses for the root surface of the radish sprouts were conducted, suggesting that the main mechanism of the rhizofiltration for the removal of uranium from groundwater would be surface precipitation on the root surface of the plant.

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“…Based on this, it is speculated that the radioactivity concentration of natural radionuclides ( 232 Th, 238 U, 40 K) in the drinking water are higher due to the wide distribution of granite strata in the geologic structure of Korea. [18] 0.4-37 0.04-9.3 Switzerland [18] 0-1000 -Spain [18] 3.7-4.4 -Egypt(tap water) [20] -27.37 Egypt(ground water) [20] -31.43 Germany(tap water) [18] -0.000518 Iran(surface waters+well) [21] 31988 -Brazil(ground water) [22][ 23] 0.1-80 0.30 Argentina(Tap water) [24] 88-70460 -Argentina(wells) [24] 176-146700 -Greece((ground water) [25] 29. Table 5 shows the absorbed dose based on the type of the drinking water.…”

Section: Th In Drinking Watermentioning

confidence: 99%

An analysis of the concentration of radioactivity of natural radionuclides (²³⁸U,²³²Th,⁴⁰K) and gamma-ray emitting artificial radionuclides(¹³⁷Cs,⁶⁰Co) present in the drinking water of the city of Busan, Republic of Korea, and the calculated absorbed dose of the residents

Kim¹,

Kim²

2012

International Journal of Contents

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Groundwater radon, radium and uranium concentrations in Região dos Lagos, Rio de Janeiro State, Brazil

Cited by 70 publications

References 16 publications

Hydrochemistry and 222Rn Concentrations in Spring Waters in the Arid Zone El Granero, Chihuahua, Mexico

Hydrochemistry and 222Rn Concentrations in Spring Waters in the Arid Zone El Granero, Chihuahua, Mexico

Application of Rhizofiltration using Lettuce, Chinese Cabbage, Radish Sprouts and Buttercup for the Remediation of Uranium Contaminated Groundwater

An analysis of the concentration of radioactivity of natural radionuclides (²³⁸U,²³²Th,⁴⁰K) and gamma-ray emitting artificial radionuclides(¹³⁷Cs,⁶⁰Co) present in the drinking water of the city of Busan, Republic of Korea, and the calculated absorbed dose of the residents

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Groundwater radon, radium and uranium concentrations in Região dos Lagos, Rio de Janeiro State, Brazil

Cited by 70 publications

References 16 publications

Hydrochemistry and 222Rn Concentrations in Spring Waters in the Arid Zone El Granero, Chihuahua, Mexico

Hydrochemistry and 222Rn Concentrations in Spring Waters in the Arid Zone El Granero, Chihuahua, Mexico

Application of Rhizofiltration using Lettuce, Chinese Cabbage, Radish Sprouts and Buttercup for the Remediation of Uranium Contaminated Groundwater

An analysis of the concentration of radioactivity of natural radionuclides (238U,232Th,40K) and gamma-ray emitting artificial radionuclides(137Cs,60Co) present in the drinking water of the city of Busan, Republic of Korea, and the calculated absorbed dose of the residents

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An analysis of the concentration of radioactivity of natural radionuclides (²³⁸U,²³²Th,⁴⁰K) and gamma-ray emitting artificial radionuclides(¹³⁷Cs,⁶⁰Co) present in the drinking water of the city of Busan, Republic of Korea, and the calculated absorbed dose of the residents