Table 3 Sequences of sorbed metal concentrations on the bulk soils and particle types. The difference is not significant when the greater-than sign is put within parentheses. The sequences for the bulk soils are based on the Q10 values. Note that no sufficient number of clay-ferrihydrite and/or ferrihydrite particles remained after the DCB extraction for data evaluation

From: Effect of pedogenic iron-oxyhydroxide removal on the metal sorption by soil clay minerals

  Sample LB Sample LBDCB
Bulk soil Pb >Cu (>) Cd > Zn Pb > Cu > Zn > Cd
Illite/smectite Cu > Pb > Zn (>) Cd Cu > Pb > Zn > Cd
Smectite Cu (>) Pb (>) Zn (>) Cd, but Cu > Zn, Cd Cu (>) Pb > Zn (>) Cd
Clay-ferrihydrite Cu (>) Pb > Zn (>) Cd -
Ferrihydrite Cu (>) Pb > Zn = Cd -
  Sample PC Sample PCDCB
Bulk soil Pb > Cu > Cd > Zn Pb > Cu > Cd > Zn
Calcite Cu (>) Pb > Cd (>) Zn Cu (>) Pb > Cd (>) Zn
Illite/smectite Cu > Pb > Zn (>) Cd Cu > Pb > Zn (>) Cd
Smectite Cu > Pb > Zn (>) Cd Cu > Pb > Zn (>) Cd
Clay-ferrihydrite Cu > Pb > Zn (>) Cd Cu (>) Pb > Zn (>) Cd
Ferrihydrite Cu (>) Pb > Cd (>) Zn -