L1 /
13
CH3041
WEATHING BY
COMPLEXING
• As the covalent bonds in silicates, aluminosilicates & oxides are strong they must be polarized for breaking either by:
•1) attack of H+
or
or
Gibbsite Al(OH)3
H+
Fulvic-
•2) attack of a
ligand
eg. Fulvic- = F-
ligand
eg. Fulvic- = F-
• After
polarization
the remaining bonds are weakened and the
complex cation detaches from the solid.
polarization
the remaining bonds are weakened and the
complex cation detaches from the solid.
