“…Skerstupp et al [45] found that Pt in solution [(Pt 4 Cl 6 ) 2 À ] was 10 times more likely to be sorbed on synthetic ferrihydrite, (Fe 1.78 Al 0.21 )O 3 Á1.8H 2 O than the clay mineral montmorillonite. Dikikh et al [46] investigated the sorptive behavior and mobility of water-soluble PGE emitted from automobiles on various soil minerals. They found that Pt, Pd, and Rh were more easily mobilized when bound to mineral phases with a low sorption capacity such as feldspar and quartz compared with those with a higher sorption capacity such as kaolinite.…”