In October 2001, the US Environmental
Protection Agency decided to move
forward with implementation of a 10-
ug/L standard for arsenic (As) in
drinking water. Given this more stringent
As standard, water facilities, especially
smaller treatment systems, need up-to-date
information on the ability of existing treatment
technologies to remove As from
drinking water. A yearlong study was conducted
at two ion-exchange (IX) and two
activated alumina (AA) water treatment
plants in New England to evaluate the performance
of these full-scale systems for
consistently removing As from raw water.
The source water contained 34-87 ug/L of
total As, consisting primarily of As(V),
except for one system in which 0.3-28.8
ug/L of As(III) was measured. Sampling
results from these real-world conditions
indicated the IX and AA systems could
remove As to < 5 ug/L in the treated water,
but only if IX resins were properly regenerated
and AA media were changed out in a
timely manner.
IX and AA processes offer water suppliers
ease of operation as well as low operations
and maintenance costs. For small water treatment
facilities and point-of-entry plants, they
represent two appealing options for meeting
the challenges of upcoming regulation
requirements. Includes 43 references, tables, figures.
| Edition : | Vol. 94 - No. 4 |
| File Size : | 1
file
, 470 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 04/01/2002 |
