Modelling the behaviour of 210Po in high temperature processes

Mora, Juan C.; Robles, B.; Corbacho, J.Á.; Gascó, Catalina; Gázquez, M.J.

doi:10.1016/j.jenvrad.2010.10.006

Cited by 13 publications

(12 citation statements)

References 14 publications

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“…It was observed that the concentrations of 210 Po in the desulfurized water were substantially higher than the sea water from the inlet, which indicated that part of the 210 Po was captured by the desulfurized water and dissolved in the water. This was in line with observations reported in (Mora et al, 2011; United Nations Scientific Committee on the Effects of Atomic Radiation, 1982). It is worth noting that the 210 Po concentration returns to background level when the desulfurization is not operating as the plant is ceasing operation.…”

Section: Resultssupporting

confidence: 93%

“…In order to take measure for responding the radiation risk from 210 Po, many work have been done on studying the 210 Po discharge and distribution in CFP. Majority of the work were performed on solid, particle, and gas phase environmental samples from CFP, for instance, fly ash, bottom ash, particles from stacks, and flue gases (Chuangao et al, 2017;Hedvall & Erlandsson, 1996;Mora, Robles, Corbacho, Gascó, & Gázquez, 2011;Roeck, Reavey, & Hardin, 1987;Ruirui, Chuangao, & Jingshun, 2013). However, 210 Po concentration in the desulfurized wastewater from CFP, which could have significant environmental impact in liquid phase from the wet desulfurization CFP, haven't drawn enough attention and been understood well.…”

Section: Introductionmentioning

confidence: 99%

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210Po concentration in desulfurized waste water of coal-fired power plant

Liu

Wang

Luo

et al. 2019

Journal of Radiation Research and Applied Sciences

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The concentration of 210 Po in the desulfurized waste water can be affected by the operation of the wet desulfurization system in the coal fired power plant (CFP). However, this correlation is poorly studied and documented in current literature. The aim of this study was to report 210 Po concentration level in desulfurized waste water from a CFP using wet desulfurization system. The average concentration of 210 Po in the waste water samples from wet desulfurization system was measured 2.4 ± 0.3E-3 Bq/L, 4 times higher than the concentration of 210 Po in our control samples (sea water), which is 6.1 ± 1.4 E-04 Bq/L. The annual total discharge of 210 Po by the waste water of desulfurization system was estimated to be 7.03 × 10 8 Bq/GWa, which is much higher than the total release of 210 Po in air from stack of a modern CFP.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

210Po concentration in desulfurized waste water of coal-fired power plant

Liu

Wang

Luo

et al. 2019

Journal of Radiation Research and Applied Sciences

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“…The natural radioactivity of fly ash depends on the geological age of the original coal bed, the combustion process used and ash particle size; being of interest due to the accumulation of radioactivity -polonium 210 -in the smallest particles of fly ashes (20,56,57). US Geological Surveys show that coal containing phosphate minerals such as monazite or apatite have high radioactive 232 Th concentrations, whereas coal containing both organic matter and mineral fractions have high levels of the 238 U radioactive series (58).…”

Section: Coal-fired Power Plant Fly Ash and Botton Ashmentioning

confidence: 99%

NORM waste, cements, and concretes. A review

Puertas

Suárez-Navarro²,

Alonso

et al. 2021

materconstrucc

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The use of industrial waste and/or by-products as alternative sources of raw materials in building materials has become standard practice. The result, more sustainable construction, is contributing to the institution of a circular economy. Nonetheless, all necessary precautions must be taken to ensure that the inclusion and use of such materials entail no new health hazard for people or their environment. Due to the processes involved in generating industrial waste/by-products, these alternative or secondary materials may be contaminated with heavy metals, other undesirable chemicals or high levels of natural radioactivity that may constrain their use. In-depth and realistic research on such industrial waste is consequently requisite to its deployment in building materials. This paper reviews the basic concepts associated with radioactivity and natural radioactivity, focusing on industrial waste/by-products comprising Naturally Occurring Radioactive Materials (NORM) used in cement and concrete manufacture. Updated radiological data are furnished on such waste (including plant fly ash, iron and steel mill slag, bauxite and phosphogypsum waste) and on other materials such as limestone, gypsum and so on. The paper also presents recent findings on radionuclide activity concentrations in Portland cements and concretes not bearing NORMs. The role of natural aggregate in end concrete radiological behaviour is broached. The radiological behaviour of alternative non-portland cements and concretes, such as alkali-activated materials and geopolymers, is also addressed.

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“…Aer combustion, the concentrations of 210 Pb, 210 Bi, and 210 Po radionuclides in y ash are considerably higher (up to 30 times) than in crude coals. 21 The activity concentrations of 210 Pb and 210 Po radionuclides in freshly formed y ash particles are strongly dependent on their diameter. For particles with an aerodynamic diameter of less than 1.1 mm, the enrichment factor for these radionuclides may be as high as 26 and 31 for 210 Pb and 210 Po, respectively.…”

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confidence: 99%

Excess of²¹⁰polonium activity in the surface urban atmosphere. Part (1) fluctuation of the²¹⁰Po excess in the air

Długosz‐Lisiecka

2015

Environ. Sci.: Processes Impacts

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The concentrations of (210)Pb, (210)Bi, and (210)Po in the urban atmosphere of Lodz city were measured from February 2010 to May 2010 and from May 2011 to April 2012. The seasonal changes in the activity ratios for (210)Po/(210)Pb and (210)Bi/(210)Pb indicated that the observed fluctuations were independent of the concentration of tropospheric (210)Pb and its decay products, particularly (210)Po. A simple calculation method was proposed for the estimation of the excess of (210)Po in urban aerosols in relation to the fraction of its activity formed from (210)Pb. On the basis of the results obtained, it was concluded that a substantial part of the (210)Po in urban air did not come from the decay of atmospheric (222)Rn, but rather it was from artificial sources. The highest levels of measured total (210)Po activity were observed during the winter period. This observation suggests that the main source of (210)Po in the investigated region could be related to anthropogenic emissions from domestic heating systems and local coal power plants, rather than from other sources, such as soil resuspension or stratospheric air intrusion as usually suggested in the literature.

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Modelling the behaviour of 210Po in high temperature processes

Cited by 13 publications

References 14 publications

210Po concentration in desulfurized waste water of coal-fired power plant

210Po concentration in desulfurized waste water of coal-fired power plant

NORM waste, cements, and concretes. A review

Excess of²¹⁰polonium activity in the surface urban atmosphere. Part (1) fluctuation of the²¹⁰Po excess in the air

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Modelling the behaviour of 210Po in high temperature processes

Cited by 13 publications

References 14 publications

210Po concentration in desulfurized waste water of coal-fired power plant

210Po concentration in desulfurized waste water of coal-fired power plant

NORM waste, cements, and concretes. A review

Excess of210polonium activity in the surface urban atmosphere. Part (1) fluctuation of the210Po excess in the air

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Excess of²¹⁰polonium activity in the surface urban atmosphere. Part (1) fluctuation of the²¹⁰Po excess in the air