Geochemistry of trace elements in Çan coal (Miocene), Çanakkale, Turkey

Gürdal, Gülbin

doi:10.1016/j.coal.2007.09.004

Cited by 56 publications

(24 citation statements)

References 35 publications

(62 reference statements)

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“…For the coal characterization process, there were some previous studies [20,21]. The basic parameters of Miocene coals from the Çan Basin have been studied by using proximate, ultimate and geochemical analyses.…”

Section: Methodsmentioning

confidence: 99%

“…To this end, some fly ash samples which are taken in 2008 from the CTPP have been examined in terms of heavy metal leach ability under various experimental methods, in order to determine the effects of the water temperature, pH and limestone. Additionally, coal characterization and quality parameters have been summarized using the existing data [15,[20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Leaching characteristics of fly ash from fluidized bed combustion thermal power plant: Case study: Çan (Çanakkale-Turkey)

Baba

Gürdal

Sengunalp

2010

Fuel Processing Technology

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It is known that the concentration of elements of fly ash varies due to the used-coal and the used-lime qualities varying in different periods. In the Çan Thermal Power Plant (CTPP) located at northwestern Turkey, Çan (Çanakkale) basin coals, which are classified as lignite to sub-bituminous C coal with high total sulphur (0.4-12.22%) and a broad range of ash contents (3.2-44.6%) are mainly used. Performed studies reveal that some toxic elements exit in the coal, including As, U and V. Also, while the As, Cu, Co and Hg contents in coal increases, the sulphur contents in coal also increase. Additionally, trace elements that have inorganic compounds in coal are mobilized into air during the combustion process. This poses a big risk for human health and keeping the environment when Çan Basins low quality lignite is burned, it's the fly ash that contains several toxic elements which can leach out and contaminate the water resources. In this study, toxicity tests were conducted on the fly ash samples that were obtained from the fluidized bed combustion of Çan Thermal Power Plant. The results showed that water temperature, pH and the quality of the limestone used were the most important factors affecting the leaching properties. Concentration of some toxic elements found in the fly ash, such as; As, Cd, Cr, Pb, Se and Zn were analyzed. Concentration richness of some heavy metals were attributed to the increase of water temperature, especially when pH is lower than 5. At pH = 5 value, there is no clear explanation of each heavy metal presence in the fly ash from fluidized bed combustion thermal power plant.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Leaching characteristics of fly ash from fluidized bed combustion thermal power plant: Case study: Çan (Çanakkale-Turkey)

Baba

Gürdal

Sengunalp

2010

Fuel Processing Technology

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“…Otherwise, in the majority of the brown coal deposits, thallium is quite low, e.g. in the Turkish lignites the average thallium content is 0.14 mg/kg, while in coals from Xingren, Guizhou (China) -0.11 mg/kg (Gürrdal, 2008;Dai et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Thallium in mineral resources extracted in Poland

Bojakowska

Paulo

2013

E3S Web of Conferences

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Abstract. Thallium concentrations in primary mineral commodities extracted in Poland and processed in high temperatures were determined by ICP-MS method. Samples of hard and brown coal, copper-silver and zinclead ores, argillaceous and calcareous rocks of different genesis and age were analyzed. The highest thallium concentrations occur in the zinc-lead ores, the average content being of 52.1 mg/kg. The copper ores contain in average 1.4 mg/kg of thallium. Hard coals from the Upper Silesian Coal Basin display higher thallium content than those exploited in the Lublin Coal Basin. Brown coals from Turow deposit distinguish by much higher values, 0.7 mg/kg Tl, than those from huge Bełchatów and smaller Konin-Turek region deposits. Average thallium concentrations in clays used for ceramic materials are lower than 1 mg/kg, except of Mio-Pliocene Slowiany deposit. The average content of thallium in the studied limestone and dolomite raw materials for cement, lime, and metallurgical flux, and refractories is very low in comparison to the average amounts in the world carbonate rocks.

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“…Trace elements can either be organically or inorganically associated, or occur simultaneously in both forms (Alto 1998;Gürdal 2011Gürdal , 2008Raask 1985;Radenovic 2006;Swaine 1990). An element is considered organically associated if it is bound with coal macerals or associated in the pore water of the coal; the element is inorganically associated if it is in the discrete mineral grains in coal (Clarke & Sloss 1992;Stach 1982;Vassilev & Vassileva 1996;Ward 2002).…”

Section: Modes Of Occurrencementioning

confidence: 99%