1. Al-Malack M.H., Bukhari A.A., Al-Muhanna H.H., Zaidi T.H.: Characteristics of flyash produced at power and water desalination plants firing fuel oil. Int. J. Environ. Res. 7, 455–466 (2013)
2. U.S. EPA: Wastes from the Combustion of Fossil Fuel. Volumes I and II, USEPA 530-R-99-010 (1999)
3. Lokeshappa B., Dikshit A.K.: Single step extractions of metals in coal fly ash. Res. Environ. 2, 1–8 (2012)
4. Morar D.L., Aydilek A.H., Seagren E.A., Demirkan M.M.: Leaching of metals from fly ash–amended permeable reactive barriers. J. Environ. Eng. 138, 815–825 (2012)
5. Yuan C.: Leaching characteristics of metals in fly ash from coal-fired power plant by sequential extraction procedure. Microchim. Acta. 165, 91–96 (2009)