A higher pH environment is conducive to the formation of Fe(III) ferric hydroxide colloid, which produces adsorption or co-precipitation of soluble heavy metals in the waste residue (Zhang).
The higher pH environment is conducive to fe(III) forming iron hydroxide collusion, which has adsorption or co-precipitation effect (Zhang) on soluble heavy metals in slag.
Higher pH environment is favorable for Fe (III) to form ferric hydroxide colloid, which can adsorb or co precipitate the soluble heavy metals in the waste residue (Zhang).<br>