Changes in mobility of hazardous elements during coal combustion in Santa Catarina power plant (Brazil)

► Santa Catarina power plant is the largest capacity in South America. ► Diagnosis was conducted to check hazardous element mobility during coal combustion. ► Most elements are bound to organic matter and sulfides in coal. ► U, As, and Cr increased mobility, mainly in the easily-soluble fraction, in coal ashes. ► Dumping and use of coal ashes pose significant risks to environment and human health.