Iron and manganese removal with ozonation in the presence of humic substances

Journal Article · · Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States)

DOI:https://doi.org/10.1080/01919518908552514· OSTI ID:5967485

Paillard, H; Bourbigot, M M ^[1]; Legube, B; Lefebvre, E ^[2]

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1. Centre de Recherche Generale des Eaux, Maisons Laffitte (France)
2. Univ. de Poitiers (France)

The conditions for the removal of iron and manganese contained in slightly mineralized water, rich in humic substances, were determined in a case where an intermediate oxidation was provided in a conventional potabilization line comprising a coagulation-flocculation stage with iron salts. The experiments were conducted both on a synthetic water, with or without addition of humic substances, and on raw water from the Moulin-Papon dam. While iron was easily removed by simply increasing the pH measurement from 8.2 to 8.5 without intermediate oxidation, ozonation applied to water with a pH of nearly 8.4 did no enable the manganese to be removed with a low ozone dose (about 1 mg/L) unless a significant amount of bicarbonates (120 to 130 mg/L as CaCO{sub 3}) were injected prior to the ozonation-filtration stage. As it removed the manganese from the water, intermediate ozonation also improves the abatement of organics on the filters, and lowers the THM buildup potential.

• OSTI ID: 5967485
• Journal Information: Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States), Journal Name: Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States) Vol. 11:1; ISSN OZSED; ISSN 0191-9512
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
CHEMICAL REACTIONS
FILTRATION
HUMIC ACIDS
HYDROGEN COMPOUNDS
IRON COMPOUNDS
MANGANESE COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
OZONIZATION
REMOVAL
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS
WATER
WATER TREATMENT