Sheridan College 1 article published in JoVE Engineering Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent Evangelos Georgakopoulos1, Rafael M. Santos2, Yi Wai Chiang3, Vasilije Manovic4 1Department of Offshore, Process and Energy Engineering, Cranfield University, 2School of Applied Chemical and Environmental Sciences, Sheridan College Institute of Technology and Advanced Learning, 3School of Engineering, University of Guelph, 4Carbon Systems Engineering, Centre for Combustion, Carbon Capture and Storage, Cranfield University A protocol for the parallel production of precipitated calcium carbonate and zeolitic material from blast furnace slag via mineral carbonation and alkaline hydrothermal conversion, respectively, is presented. The performance of the zeolitic material towards nickel adsorption is tested.