Monochloramine reduction in fixed-bed reactors (FBRs) was quantified at three empty-bed contact times
(EBCTs) using five types of granular activated carbon (GAC) and two background waters (lake water and
synthetic organic-free water). For a given set of influent conditions, chosen to mimic that of drinking
water utilities that practice chloramination, steady-state monochloramine effluent concentrations were
reached following a period of higher removal. Steady-state monochloramine reduction varied with
background water and GAC type. The deleterious impact of natural organic matter (NOM) was found to
be directly related to the GAC surface area contained within pores greater than 2 nm in width, which
indicated predominantly microporous GACs were suitable for monochloramine reduction in FBRs.
While all GACs showed intrinsic catalytic capability for monochloramine reduction, such properties were
enhanced with decreasing GAC acidity and the presence of nitrogen-containing functional groups such as
lactams and imides. Includes 20 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 280 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 9 |
| Published : | 06/01/2006 |
