Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
275645 | International Journal of Mining Science and Technology | 2012 | 6 Pages |
This study focuses on the geochemistry of trace elements and parameters of coal quality of bituminous coal belonging to the upper Triassic-lower Jurassic era, collected from the Galandrud region in Central Alborz, northern Iran. Galandrud coal on an air-dried basis are characterized by broad variation in the amount of ash (ranging from 6.4% to 12.73%), a high content of volatile matter (33.32–37.45%) and high gross calorific values (7430–8880 kcal/kg). The mineral matter of the coal samples studied is made up of dolomite (>90%), quartz, sphalerite, galena, pyrite and clay minerals. Major elements are positively correlated with ash content suggesting an association with inorganic constituents. Based on statistical analyses, concentrations of trace elements such as Co (51.3 × 10−6–152.9 × 10−6), Ba (368 × 10−6–3297.4 × 10−6), Cr (65.5 × 10−6–194.2 × 10−6), Mo (5.6 × 10−6–18.2 × 10−6), Ni (72.9 × 10−6–152.9 × 10−6) and V (245.5 × 10−6–520 × 10−6) are higher than world coal averages. However, low concentration of some volatile elements such as As, Hg and U are present in low concentrations of the various types of coal studied.