Leaching of lead metallurgical slags and pollutant mobility far from equilibrium conditions

Characterization of the lead smelter slag in Santo Amaro, Bahia, Brazil

“…Considerable attention has been given to the characterization and stability of both old and new lead slags in France [6][7][8], the Czech Republic [9,10], Germany [11,12], South Africa [13], Belgium [14], the United Kingdom [15], Namibia, [16], the United States [17], and Canada [18]. It is interesting to note that the stability of the slag depends on the raw material (ore concentrate or solid waste composition) and the process.…”

Development of Plant Roots Network in Polluted Soils: An X-ray Computed Microtomography Investigation

“…Several metal-bearing phases were identified: metalliferous spinels, iron oxides, polymetallic melts, and lead droplets (about 1% volume), whose diameters range between 1 and 400 µm. Leaching tests on slags showed that metals can be released (Seignez et al 2008). …”

Reduction in toxicity and generation of slag in secondary lead process

“…In order to ensure that slag can perform the functions above enumerated, it must have a set of optimum characteristics that can be arbitrarily divided into four groups: thermophysical properties, thermodynamic parameters and kinetic parameters describing melting of the mixture; physical and chemical properties of liquid slag layer; melt heating methods, and environmental indicators (Seignez et al, 2008). Yet, as mentioned by Lewis and Beautement (2002), a route to minimize the environmental impact of processes is through waste and process characterization.…”

“…Only after a stage of stabilization and solidification can this waste be landfilled with an optimal degree of safety. Seignez et al (2008) have studied the leaching behavior of lead slags from blast furnaces in pure water and open flow experiments. The pollutant release at conditions found in landfills was determined and the understanding of such mechanisms was improved.…”