Presence of contamination by As Cd, As, Pb, Se, and Hg in coals of the Cundiboyacense area, Colombia

Coals of Cundiboyacense area were studied in order to determine their presence and quantify of content of contaminants such as cadmium (Cd), arsenic (As), lead (Pb), selenium (Se), and mercury (Hg), which are compared with Clarke index for coals of the same rank. Coal samples were taken from active...

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