Kinectics and pathways of degradation of disinfection by-products by synthetic iron oxide minerals

Research output: Contribution to journalConference articlepeer-review

Abstract

Reduction of disinfection by-products (DBP) by iron oxides may play a role in the degradation of DBP in water distribution systems. The kinetics and pathways of the reactions of six selected DBP, i.e., dichloromethane (TCM), trichloroacetic acid, 1,1,-trichloropropanone (1,1,1-TCP), dichloroactaldehyde, trichloroacetonitrile (TCAN), and trichloronitromethane (TCNM), with synthetic iron oxides were determined. Hydrogenolysis and hydrolysis were the dominant reaction pathways for most DBP. The degradation rate of TCNM by Fe(II)/goethite was much faster than that of TCAN. No reduction of 1,1,1-TCP occurred in the presence of Fe(II)/goethite. The observed loss of 1,1,1-TCP was due to both hydrolysis and sorption. 1,1,1-TCP was hydrolyzed to TCM, which was the only product detected. Also, 1,1,1-TCP absorbed to the goethite surface. Thus, sorption may be an important loss mechanism for some DBP in water distribution systems. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA 8/22-26/2004).

Original languageEnglish (US)
Pages (from-to)445-448
Number of pages4
JournalACS, Division of Environmental Chemistry - Preprints of Extended Abstracts
Volume44
Issue number2
StatePublished - Dec 1 2004
Event228th ACS National Meeting - Philadelphia, PA, United States
Duration: Aug 22 2004Aug 26 2004

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