Radiometric measurement of lignite coal and its by-products and assessment of the usability of fly ash as raw materials in Turkey

Turhan, Şeref; Gören, E.; Garad, A. M. K.; Altıkulaç, Aydan; Kurnaz, Aslı; Duran, Celalettin; Hançerlioğulları, Aybaba; Altunal, V.; Güçkan, V.; Özdemir, A.

doi:10.1515/ract-2017-2863

Cited by 23 publications

(13 citation statements)

References 30 publications

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“…The annual coal consumption is around 7 Mt, consumed by three units 1 . The Kangal coal deposit was the subject of several petrographic, geological, and mining utilization studies (Narin and Kavuşan, 1993;Basarir and Karpuz, 2004;Toprak and Yalcin Erik, 2011;Yalçin Erik, 2011;Koçaslan et al, 2017); however, a limited number of studies were focused on geochemical compositions of feed coals and radionuclides of feed coals and combustion residues (Karayigit et al, 2000(Karayigit et al, , 2001bKalender and Karamazı, 2017;Turhan et al, 2018). The current study focuses on the mineralogical and geochemical characteristics of FCs and combustion residues (FA and BA) from Unit-I and evaluates factors that control elemental enrichment of FC, FA, and BA.…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and geochemistry of feed coals and combustion residues of the Kangal power plant (Sivas, Turkey)

Karayi̇ǧi̇t¹,

Oskay²,

Gayer³

2019

Turkish J Earth Sci

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This study focuses on mineralogical and geochemical compositions of feed coal (FC) and combustion residues, namely fly ash (FA) and bottom ash (BA) samples, obtained from the Kangal coal-fired power plant in central Turkey. The X-ray powder diffraction data indicate that carbonate and clay minerals are dominant phases in the FC samples. In the FA samples, quartz, hematite, anhydrite, lime, and feldspar are generally dominant and abundant phases, whereas calcite, ettringite, and portlandite are generally more abundant in the BA samples. The elements Mo, Cs, and U are significantly enriched in the studied FC, FA, and BA samples. The statistical analysis and SEM-EDX data show that Ca, Ti, and the vast majority of trace elements are inorganically affiliated, and only Tl and U have probable organic affinity in the FC. In addition, the redox conditions in the paleomires presumably resulting in Mo and U enrichment in FC, whereas their enrichment in FA and BA is most likely related to retention by CaO and Ca-sulfate. The Cs enrichment in FA is due to retention by glass. The elements in the FA and BA are distinguished into four groups according to their volatility during combustion. The elements As, Mo, Cd, Tl, and U (Group I) are the most volatile elements during combustion and condensation in the FA. The elements Li, Zn, Ga, Rb, Nb, Cs, Ba, La, and Pb (Group IV) did not become more volatile or less volatile during combustion and are located in BA. Nevertheless, Zn and Pb in the BA seem to be related to the presence of unaffected pyrite and sphalerite, and are due to low combustion efficiency of the boiler during the sampling period. Overall, enriched elements and minerals in FA and BA suggest that their disposal should be undertaken with caution.

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Section: Introductionmentioning

confidence: 99%

Mineralogy and geochemistry of feed coals and combustion residues of the Kangal power plant (Sivas, Turkey)

Karayi̇ǧi̇t¹,

Oskay²,

Gayer³

2019

Turkish J Earth Sci

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“…A frac tion of the 222 Rn, which is pro duced from the de cay of 226 Ra in the solid grains, es capes into the pore spaces among solid grains [19]. The em a na tion co ef fi cient (EC) is the ra tio of the amount of 222 Rn that en ters pore spaces over the to tal amount of pro duced ra don [20]. The EC is a dimensionless pa ram e ter and rep re sented as ei ther a frac tion or a per cent age [20].…”

Section: Ra Don Em a Na Tion Co Ef Fi Cients And Its Mass Ex Ha La Timentioning

confidence: 99%

“…The em a na tion co ef fi cient (EC) is the ra tio of the amount of 222 Rn that en ters pore spaces over the to tal amount of pro duced ra don [20]. The EC is a dimensionless pa ram e ter and rep re sented as ei ther a frac tion or a per cent age [20]. The mea sure ment of the EC was car ried out by us ing the gamma-ray spec trom e try.…”

Section: Ra Don Em a Na Tion Co Ef Fi Cients And Its Mass Ex Ha La Timentioning

confidence: 99%

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Radiometric properties of sepiolite minerals from quarries in central Anatolia of Turkey

et al. 2019

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Sepio lite is a nat u rally oc cur ring clay min eral of sed i men tary or i gin and is a mag ne sium hydrosilicate. Sepio lite has been widely used as an ad di tive raw ma te rial in ce ram ics and cement in dus try, phar ma ceu ti cal, clean ing-de ter gent, pa per, paint, cos metic ag ri cul ture, fer tilizer, etc. In this study, the nat u ral ra dio ac tiv ity lev els, ra don em a na tion co ef fi cients and ra don ex ha la tion rates of 30 sepio lite sam ples col lected from open three sepio lite quar ries (Beylikova, Polath and Sivrihisar) in Cen tral Anatolia re gion of Tur key were de ter mined by us ing a gamma-ray spec trom e try with an HPGe de tec tor. The av er age ab sorbed gamma dose rates di rectly mea sured in Beylikova, Polath and Sivrihisar open three sepio lite quar ries located in Cen tral Anatolia re gion of Tur key were found as 59, 65, and 64 nGyh-1 , re spec tively. The av er age ac tiv ity con cen tra tions of 226 Ra, 232 Th, and 40 K in 30 sepio lite sam ples col lected from those quar ries were found as 38.6, 12.4, and 67.4 Bqkg-1 , re spec tively. The av er age ema na tion co ef fi cient and ex ha la tion rate of ra don of sepio lite sam ples were de ter mined as 22 % and 0.065 Bqkg-1 h-1 , re spec tively. Also, ra dio log i cal pa ram e ters (out door ab sorbed gamma dose rate, an nual ef fec tive dose rate, ex ter nal and in ter nal in dex) were es ti mated to eval u ate the use of sepio lite sam ples as ad di tive raw ma te ri als in the build ing sec tor. Key words: sepio lite, nat u ral ra dio ac tiv ity, out door ab sorbed gamma dose rate, ra don em a na tion co ef fi cient, ra don mass ex ha la tion rate, gamma-ray spec trom e try

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“…The min i mum de tect able ac tiv ity (MDA, in confi dence level 95 %) of the gamma ray spec tro met ric sys tem was cal cu lated as [18,19] MDA…”

Section: Radionuclide Anal Y Sismentioning

confidence: 99%

Radionuclide and heavy metal content in the table olive (Olea europaea L.) from the Mediterranean region of Turkey

Karataşlı

2018

NUCL TECH RAD PROT

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This study pres ents the con cen tra tions of radionuclides and heavy met als in twenty-six ta ble ol ive (Olea europaea L.) sam ples, and an as sess ment of the health risks as so ci ated with their con sump tion. The sam ples were col lected from dif fer ent towns in the Med i ter ra nean re gion of Tur key, one of the ma jor ol ive-pro duc ing coun tries in the world. The av er age ac tiv ity concen tra tions of 226 Ra, 232 Th, 40 K, and 137 Cs in the ed ible parts of the ta ble ol ive sam ples were found as 37.9 ± 4.1, 7.1 ± 0.5, 274.6 ± 14.7, and 7.2 ± 0.7 Bqkg (dw), re spec tively, by us ing a gamma ray spec trom e ter. The ef fec tive ra di a tion dose due to the in take of these radionuclides through in ges tion of ol ive sam ples var ied from 3.4 to 22.7 mSv with an av er age value of 11 ± 1 mSv. The av er age con cen tra tions of Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, and Pb in the ed ible parts of the ta ble ol ive sam ples were de ter mined as 2.04, 11.08, 166.60, 0.20, 10.29, 13.81, 14.34, 4.50, and 4.55 mgg-1 , re spec tively, by us ing an in duc tively cou pled plasma op ti cal emis sion spec trom e ter. Based on the mea sured con tent of the radionuclides and heavy met als, the re sults im ply that ta ble ol ives are safe for hu man con sump tion.

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Radiometric measurement of lignite coal and its by-products and assessment of the usability of fly ash as raw materials in Turkey

Cited by 23 publications

References 30 publications

Mineralogy and geochemistry of feed coals and combustion residues of the Kangal power plant (Sivas, Turkey)

Mineralogy and geochemistry of feed coals and combustion residues of the Kangal power plant (Sivas, Turkey)

Radiometric properties of sepiolite minerals from quarries in central Anatolia of Turkey

Radionuclide and heavy metal content in the table olive (Olea europaea L.) from the Mediterranean region of Turkey

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