Ni clay neoformation on montmorillonite surface.
Polarized extended X-ray absorption fine structure spectroscopy (P-EXAFS) was used to study the sorption mechanism of Ni on the aluminous hydrous silicate montmorillonite at high ionic strength (0.3 M NaClO4), pH 8 and a Ni concentration of 0.66 mM. Highly textured self-supporting clay films were obtained by slowly filtrating a clay suspension after a reaction time of 14 days. P-EXAFS results indicate that sorbed Ni has a Ni clay-like structural environment with the same crystallographic orientation as montmorillonite layers.
Dähn
R
R
Paul Scherrer Institut, Villigen, France.
Scheidegger
A
A
Manceau
A
A
Schlegel
M
M
Baeyens
B
B
Bradbury
M H
MH