This powerpoint presentation begins by providing a brief overview of arsenic contamination, and alternative processes for removing arsenic. The advantages of iron preloaded granular activated carbon (GAC) are presented, along with experimental set-up that consisted of iron tailored GAC tested in rapid small-scale
column tests (RSSCTs) and pilot-scale
trials at Penn State. Pilot columns, electrolytic cell, branched iron rods, and laboratory columns are presented, along with conclusions that indicate the following: in RSSCT testing, the temperature of iron precuring
(60-100ºC) made little difference;
RSSCT and pilot column results agreed closely
(RSSCT designed via proportional diffusivity);
the branched rod configuration with higher
surface area worked more effectively than
straight rods that had less surface area; combining rods with iron tailored GAC
provided effective As removal at start-up;
the most effective system combined
branched iron rods with Fe-GAC, extending
BV of 10 ppb As to 43,000 BV;
electrolytic cells were effective for As
removal but columns experienced pressure
and voltage buildup; and,
effluent iron < 0.2 mg/L for all runs, except
when rods extend to media bottom. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.5 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 28 |
| Published : | 11/01/2009 |
