Iron-modified granular activated carbon (GAC) and
zero-valent iron (ZVI) have been shown to be effective
for arsenic (As) adsorption, but they both have
strengths and shortcomings. In this research, GAC and
ZVI were combined in an innovative As adsorption
system that shows significant potential for removal of
As in drinking water systems.
Results of rapid small-scale column tests indicated
that an optimum combination of GAC and ZVI
removed As to meet the US standard of 10 µg/L while
providing a cost-effective way of increasing the bed life
of GAC. Further studies are needed to determine
whether laboratory results can be extended to fullscale
application and other water sources.
This work represents a promising approach to
removing As, especially for water providers that
already have GAC systems installed. Rather than
installing new processes for As removal, utilities may
be able to adapt their current systems to meet the regulatory
challenge. Includes 27 references, tables, figures.
| Edition : | Vol. 100 - No. 8 |
| File Size : | 1
file
, 710 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 08/01/2008 |
