Development of a Geochemical Speciation Model for Use in Evaluating Leaching from a Cementitious Radioactive Waste Form

• Published in: Environmental science & technology Vol. 55; no. 13; pp. 8642 - 8653
• Main Authors: Chen, Zhiliang, Zhang, Peng, Brown, Kevin G, Branch, Janelle L, van der Sloot, Hans A, Meeussen, Johannes C. L, Delapp, Rossane C, Um, Wooyong, Kosson, David S
• Format: Journal Article
• Language: English
• Published: Easton American Chemical Society 06.07.2021
• Subjects: Aging; Blast furnace slags; Cast stone; Constituents; Contaminants in Aquatic and Terrestrial Environments; Diffusion; furnaces; Geochemistry; Immobilization; Leaching; Pore water; radioactive waste; Radioactive wastes; Slag; slags; Speciation; chromium; grout; technetium; redox behavior; Cast Stone; monolithic diffusion

Cast Stone has been developed to immobilize a fraction of radioactive waste at the Hanford Site; however, constituents of potential concern (COPCs) can be released when in contact with water during disposal. Herein, a representative mineral and parameter set for geochemical speciation modeling was d...