Researchers have noted that Mg(OH)2 solids
reduce natural organic matter (NOM) concentrations significantly more efficiently than CaCO3 solids. To
date, enhanced softening research indicates
magnesium plays an important role in NOM removal even at pH values below that
required for precipitation of Mg(OH)2, possibly due to the formation of mixed Mg-
CaCO3 precipitates. Unfortunately, little is known about these minor precipitates
formed in softening, and hence the positive impact cannot be systematically taken
advantage of in operating treatment plants. This research attempts to close the gap
in softening research by: determining the chemical composition and structure of
solids formed under various softening conditions (e.g., Ca:Mg ratio of the raw water
and pH of softening); and, investigating the capability of removing natural organic
matter depending on the chemical and surface characteristics of the solids formed
(e.g., degree of incorporation of minor constituents in solids, surface charge, shape). Includes 10 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1000 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 06/15/2003 |
