Use of ion exchange to remove arsenic (As) from
drinking water has been viewed skeptically by
many water suppliers, primarily because the cost
of resin regeneration makes the process uneconomical
when the system is operated conventionally. Furthermore,
the appeal of ion exchange for treating a variety
of contaminants is frequently limited by the brine
requirements.
The novel ion exchange process described here
reduces the brine requirements and extends the service
life of ion exchange beds used for As removal. By modifying
operation of the ion exchange resins, a larger
fraction of their capacity can be devoted to removing
As. At the same time, the brine management system can
be adapted to require much less makeup brine.
Results of this study show that the process of ion
exchange can be operated more efficiently, making it a
viable treatment option for both As and a number of
other contaminants. Water suppliers may want to take
another look at ion exchange to determine whether the
process can meet their treatment objectives at reasonable
costs. Includes 17 references, figures.
| Edition : | Vol. 95 - No. 3 |
| File Size : | 1
file
, 310 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 9 |
| Published : | 03/01/2003 |
