Micro Pollutant Removal from Drinking Water

Organic micro pollutants are found in surface and ground waters, always in conjunction with more or less NOM, but at relatively low concentrations in the range of 0.1 μg.L-1 to 100 μg.L-1 (in water sources of sufficient quality for a water supply). In practical ozone applications, trace organic oxidation has not been a primary task, but was considered to be a positive side effect. the table below shows some expected reductions:

Compound Range of Reduction Comment
MIB/geosmin 40-90% See Taste and Odor Control Page
Alkanes <10%
Alkenes/Chlorinated Alkenes 10-100% Chlorine content important
Aromatics and Chloro Aromatics 30-100% Chlorine content important
Aldehydes, Alcohols, Caboxylic Acids Low Products of Ozonation AOP may be needed
N-containing aliphatics/aromatics 0-50% AOP may be needed
Pesticides 0-80% Compound Specific AOP May be needed
Polyaromatic hydrocarbons Up to 100%

AOP - Advanced Oxidation Processes, combine ozone with UV, peroxide and catalysts to form hydroxyl radicals. Hydroxyl radicals are extremely strong oxidizing species that can break down virtual all organic compounds to carbon dioxide.