Distribution and correlation of the natural radionuclides in a coal mine of the West Macedonia Lignite Center (Greece)

Tsikritzis, Lazaros; Fotakis, M.; Tzimkas, N.; Kolovos, Nestoras; Tsikritzi, R.

doi:10.1016/j.jenvrad.2007.07.014

Cited by 21 publications

(14 citation statements)

References 12 publications

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“…The lowest activity concentrations of 232 Th in coal were from Canada (Tracy and Prantl 1985), Egypt, Nigeria (Balogun et al 2003) and Turkey (Varinlioğlu et al 1998;Öztürk and Özdoğan 2000). One of the reported activity concentration of 226 Ra in Greek coal (Papaefthymiou et al 2007) provided the highest value and is obviously higher than the other two measurements (Tsikritzis et al 2008;Papastefanou 2010). In addition, the activity concentrations of 226 Ra in Turkish coal are not in good agreement with each other (Varinlioğlu et al 1998;Öztürk and Özdoğan 2000).…”

Section: Concentrations Of Major and Trace Elements: Cement Plantmentioning

confidence: 62%

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Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Elmekawy

Badran

Seddeek

et al. 2015

Environ Monit Assess

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Non-nuclear industries use raw materials containing significant levels of naturally occurring radioactive material (NORM). The processing of these materials may expose workers engaged in or even people living near such sites to technologically enhanced naturally occurring radioactive material (TENORM) above the natural background. Inductively coupled plasma and gamma ray spectrometry have been used to determine major and trace elements and radionuclide concentrations in various samples, respectively, in order to investigate the environmental impact of coal mining and cement plant in North Sinai, Egypt. Generally, very little attention was directed to the large volumes of waste generated by either type of industrial activities. Different samples were analyzed including various raw materials, coal, charcoal, Portland and white cement, sludge, and wastes. Coal mine and cement plant workers dealing with waste and kaolin, respectively, are subjected to a relatively high annual effective dose. One of the important finding is the enhancement of all measured elements and radionuclides in the sludge found in coal mine. It may pose an environmental threat because of its large volume and its use as combustion material. The mine environment may have constituted Al, Fe, Cr, and V pollution source for the local area. Higher concentration of Al, Fe, Mn, B, Co, Cr, Mn, Ni, Sr, V, and TENORM were found in Portland cement and Zn in white cement. Coal has higher concentrations of Al, Fe, B, Co, Cr, and V as well as (226)Ra and (232)Th. The compiled results from the present study and different worldwide investigations demonstrate the obvious unrealistic ranges normally used for (226)Ra and (232)Th activity concentrations in coal and provided ranges for coal, Portland and white cement, gypsum, and limestone.

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Section: Concentrations Of Major and Trace Elements: Cement Plantmentioning

confidence: 62%

“…The ratio of 226 Ra/ 232 Th for coal and charcoal is lower than unity. In many cases, the 238 U/ 232 Th ratio in coal is either slightly higher (Tsikritzis et al 2008) or much higher (Flues et al 2007) than unity. The 226 Ra/ 40 K ratio in coal is much different than that in charcoal.…”

Section: Concentrations Of Major and Trace Elements: Cement Plantmentioning

confidence: 98%

Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Elmekawy

Badran

Seddeek

et al. 2015

Environ Monit Assess

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“…Cameron et al, 1984;International Journal of Coal Geology 78 (2009) Georgakopoulos and Valceva, 2000;Papazisimou, 2003;Bouzinos, 2004;Kalaitzidis et al, 2004;Papanicolaou et al, 2004;Antoniadis et al, 2006). There are also few studies dealing with the occurrence of natural radionuclides in coal with respect to the depositional environments (Georgakopoulos, 2000;Tsikritzis et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Palaeoenvironment of Seam I in the Marathousa Lignite Mine, Megalopolis Basin (Southern Greece)

Siavalas

Linou

Chatziapostolou

et al. 2009

International Journal of Coal Geology

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“…The burnability (B) of the raw mixtures can be estimated according to Equations (1) and (2) [9] : C＝2fCaO 1 100 ℃＋2fCaO 1 200 ℃＋3fCaO 1 300 ℃＋ 4fCaO 1 350 ℃＋4fCaO 1 400 ℃＋2fCaO 1 450 ℃ (1) B＝600/C…”

Section: Evaluation Of the Burnability Of The Raw Mealmentioning

confidence: 99%

Effect of CuO on the burnability and mineral formation of high C3S cement clinker

Chen

Wang

2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The effect of CuO on the clinkering process and mineral structure, components and morphology of high C 3 S cement clinker was studied. One reference mixture was prepared according to the potential mineral phase components C 3 S=75%, C 3 A=7%, C 4 AF=18% and then was mixed, respectively, with 0.5%, 1%, 1.5%, 2%, 2.5% and 4% CuO. All samples were heated at a rate of 10°C/min to the design temperatures and then maintained for 40 min. Analyses by the glycerol-ethanol method, XRD and SEM-EDS show that the minimum of free lime (f-CaO) content was related to temperature and CuO amount. The higher the temperature, the lower the amount of CuO corresponding to the f-CaO minimum content. CuO promotes the formation and growth of C 3 S and C 4 AF and a new compound is found. In addition, these phenomena are discussed theoretically. In conclusion, CuO alters the burnability and the formation and structure of C 3 S in a high C 3 S cement system.

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Distribution and correlation of the natural radionuclides in a coal mine of the West Macedonia Lignite Center (Greece)

Cited by 21 publications

References 12 publications

Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Palaeoenvironment of Seam I in the Marathousa Lignite Mine, Megalopolis Basin (Southern Greece)

Effect of CuO on the burnability and mineral formation of high C3S cement clinker

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