Inorganic polymer flocculants (IPFs) are used as
water and wastewater treatment reagents. These
preproduced IPFs can be considered the second
generation of the metal salt coagulants. It has
become evident that differences occur in coagulation
between polyaluminum chloride (PACl) and polyiron
chloride (PICl), related to basicity (B). The formation
and stability of polymers cause significant different
behavior using PACl and PICl during the
coagulation process. A high B value can be favorable
for PACl preparation, but it is not fit for PICl.
Therefore, a scientific design and application are
needed for IPFs according to primary water quality
conditions.
The authors sought to answer two questions. First,
is there any difference between coagulation with Al(III)
and Fe(III) and their hydrolysis products as a result?
Second, can iron-based IPFs be equal in efficiency with
aluminum-based IPFs? This article addresses the reasons
for the differences in coagulation and suggests that
a different parameter (B value) should be adopted to
prepare PICl in comparison with PACl. Includes 26 references, tables, figures.
| Edition : | Vol. 95 - No. 1 |
| File Size : | 1
file
, 230 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 8 |
| Published : | 01/01/2003 |
