Slag Valorization: Relevance of Standard Protocols to Evaluate Environmental Impacts

摘要

According to the legislation, valorization type, origin and characteristics of waste material,various standard procedures are available to evaluate environmental impacts.A Mn-rich slag was sampled from a metallurgical plant. After its characterization(elementary analysis and mineralogy), five standard procedures were carried out (i.e. TCLP,EN 12457-1). Each fixed parameter of the standards was systematically studied in a largerange: pH, Liquid/Solid ratio, contact time. For example, EN 12457-1 led to a low MEmobilization, increasing with the L/S ratio, the contact time and an acidic pH.As a conclusion, the representativeness of the considered parameters and their potentialvariations are predominant to assess of the real environmental impact during slag reuse.