Arsenic leaching in aquifers has become a
problem for aquifer storage and recovery (ASR)
operations. The highly oxidative nature of finished
water causes arsenic in naturally occurring
minerals to leach from aquifer formations. The
authors evaluated the effects of lowering dissolved
oxygen concentrations and removing chorine
residual in injected potable water on arsenic
leaching in storage aquifers. Using geochemical
modeling, they predicted interactions between
injected water and the stored aquifer formation
and native water quality. The authors found that
returning finished potable water to native groundwater
quality through wellhead pretreatment may
prevent naturally occurring arsenic from leaching
from aquifers. In addition, existing pretreatment
technologies can be implemented that make the
injected water more compatible with the native
aquifer quality. These pretreatment technologies
could allow utilities to operate their ASR facilities
in compliance with federal underground injection
control regulations and drinking water criteria,
thereby avoiding consent/administrative orders
from regulatory agencies. Includes 41 references, tables, figures.
| Edition : | Vol. 101 - No. 6 |
| File Size : | 1
file
, 810 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 06/01/2009 |
