The formation of disinfecting by-products (DBP) which are
thought to be carcinogens might result from the chlorination
of water with a low concentration of natural organic matter
(NOMs). The conventional chemical coagulation process is
effective in removing colloidal particles as well as NOMs, such
as organic humic acid and fulvic acid [1–3]. Removing the
majority of NOMs would greatly reduce the load on the subsequent
activated carbon treatment and would decrease the dosage
of ozone required [4]. Most domestic and international reports
advocate the use of aluminum or ferric salts to remove NOMs
[5–7]. The hydrolysis of metal ions is an important reaction
for the destabilization of suspended particles and organic matter
in coagulation. The hydrolysis of polymeric and monomeric
coagulants are quite different [8]. The hydrolysis process using
single nucleus metallic salt in coagulation was completed in a
short time, which make the coagulation hard to control [9,10].