A. Amirtharajah et al., FERRIC-CHLORIDE COAGULATION FOR REMOVAL OF DISSOLVED ORGANIC-MATTER AND TRIHALOMETHANE PRECURSORS, Water science and technology, 27(11), 1993, pp. 113-121
Citations number
13
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Ferric chloride coagulation of two types of natural dissolved organic
matter was studied. The molecular weight distribution of Suwannee Rive
r humic substances currently used as an international standard was cha
racterized using fast atom bombardment mass spectrometry (FABMS). The
molecular weight distributions were characterized before and after coa
gulation. Ferric chloride dosage and pH domains on the iron coaglation
diagrams were developed for removal of these humic substances and for
determination of the resulting trihalomethane formation potentials (T
HMFP) of the treated water. The results indicate that it is possible t
o maximize the removal of dissolved organic matter and minimize trihal
omethanes by coagulation only under very specific conditions of pH and
ferric chloride dosage.