is not significantly increased due to carbonation. It should
be noted that depletion from the residues of heavy metals
like Cd, Ni, Pb and Zn, which all showed increasing concentrations
as pH decreased in the acidic range, were significantly
delayed after carbonation. This implies that
leaching of these metals may be evaluated with respect to
non-carbonated samples without underestimating the
leachate concentrations or the potential leachability