xviii
FIGURE 5.1 Weathering scenarios that may occur at slag dumping sites. ........................... 138
FIGURE 5.2 The release of Cu under slags exposure to UPW (A), HA, FA (B) and
ARE (pH 2.9 and 4.4) (C). ............................................................................................ 143
FIGURE 5.3 The release of Zn under slags exposure to UPW (A), HA, FA (B) and
ARE (pH 2.9 and 4.4) (C). ............................................................................................ 144
FIGURE 5.4 The release of Pb under slags exposure to UPW (A), HA, FA (B) and
ARE (pH 2.9 and 4.4) (C). ............................................................................................ 145
FIGURE 5.5 Scanning electron microscopic images presenting weathering features of slags
exposed to artificial root exudates solution for 960 h. .................................................. 149
FIGURE 5.6 Scanning electron microscope images presenting weathering features of slags
exposed to humic acid solution for 960 h. .................................................................... 150
FIGURE 5.7 Bioweathering mechanisms. ............................................................................. 162
FIGURE 6.1 Evolution of
Pseudomonas aeruginosa growth
in the experiments supplemented
with crystalline slag (CS), granulated slag (GS) and control growth without slag
supplementation. ........................................................................................................... 172
FIGURE 6.2 Evolution of pH in the experiments carried out with crystalline - CS (A) and
granulated - GS (B) slag. .............................................................................................. 173
FIGURE 6.3 Cumulative leaching of Si and Fe from crystalline (CS) and granulated (GS)
slags during 112 days of experiments with ultrapure water (UPW), growth medium
(GM) and biotic solution (GMB). ................................................................................. 174
FIGURE 6.4 Cumulative leaching of metallic elements (Cu, Zn, Pb) from crystalline (CS) and
granulated (GS) slags during 112 days of experiments with ultrapure water (UPW),
growth medium (GM) and biotic solution (GMB). ...................................................... 175
FIGURE 6.5 Three-dimensional spectra presenting the fluorophores of metabolic products
excreted by
Pseudomonas aeruginosa in the presence of GS and CS after 14 and 28
days of experiment. ....................................................................................................... 179
FIGURE 6.6 SEM images presenting weathering features of crystalline slag after exposure to
ultrapure water (a), growth medium (b) and growth medium with
Pseudomonas
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