This powerpoint presentation begins by providing a brief overview of arsenic in drinking water. Treatment processes presented include the following: ion exchange; activated alumina; coagulation-filtration (with FeCl<sub>3</syb<); reverse osmosis (RO) and nanofiltration (NF); and, granular iron media. Study objectives include the following:
determine the ferric chloride
concentrations for treatment of brines
containing high alkalinity, ionic strength
and arsenic concentrations; and,
investigate the effect of various ionic
strengths and alkalinity levels on arsenic
removal and determine sludge volume
generated and settling velocity (ongoing
research). The experimental approach is presented, along with presentation conclusions that indicate the following:
optimal conditions obtained for arsenic removal
using ferric chloride from drinking waters is
different from the ones for brines due to the
high ionic strength, alkalinity and arsenic
concentration of the brine solutions;
As can be efficiently removed from brines (up
to 100%) using ferric chloride (at pH < 7). High
concentration of FeCl<sub>3</sub> is required due to high
concentrations of arsenic compared to drinking
water; and,
it is therefore possible to use ion exchange for
arsenic removal and treat the brine generated
to a non-hazardous level. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.1 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 22 |
| Published : | 11/01/2008 |
