You are here:
THE EFFECT OF OXIDANTS ON THE PROPERTIES OF FE (III) PARTICLES AND SUSPENSIONS FORMED FROM THE OXIDATION OF FE (II)
Citation:
Lytle*, D A., M L. Magnuson*, AND V. L. Snoeyink. THE EFFECT OF OXIDANTS ON THE PROPERTIES OF FE (III) PARTICLES AND SUSPENSIONS FORMED FROM THE OXIDATION OF FE (II). ISSN 1551-8833, M. Lacey (ed.), JOURNAL OF AMERICAN WATER WORKS ASSOCIATION. American Water Works Association, Denver, CO, 96(8):112-124, (2004).
Description:
Oxidation of Fe(II) to Fe(III) is an important reaction in drinking water treatment and distribution systems, and the ferric particles that form are a major source of consumer complaints of colored water. Ferrous iron is found naturally in many ground waters and can be released from drinking distribution system materials. Bench-scale experiments were conducted to study the effect pH, oxidant type (oxygen, chlorine and chlorine dioxide) and oxidant concentration on the properties of Fe(III) particles and suspensions formed from the oxidation of Fe(II). The color and turbidity per unit mass of iron of suspensions formed from oxygen were more than twice those of suspensions formed from chlorine and chlorine dioxide at all pH values. Similar observations were made during tests with oxygen and chlorine using natural ground waters at two field locations. Particles formed from chlorine and chlorine dioxide were less dense, and had a greater capacity to adsorb orthophosphate. Experimental observations were explained using a model that considers differences in Fe(III) particle formation and growth pathways.