Evaluating an AOP for TCE and PCE removal

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Journal of the American Water Works Association

OSTI ID:524725

Karimi, A A; Redman, J A; Stolarik, G F ^[1]; Glaze, W H ^[2]

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1. Los Angeles Dept. of Water and Power, CA (United States)
2. Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Environmental Sciences and Engineering

A full-scale evaluation of an advanced oxidation process (AOP) involving the use of ozone (O{sub 3}) and hydrogen peroxide (H{sub 2}O{sub 2}) at a 126-L/s (2,000-gpm) flow rate was completed in a plug-flow hydraulic regime by the Los Angeles (Calif.) Department of Water and Power. This facility is the first full-scale AOP for trichloroethylene (TCE) and tetrachloroethylene (PCE) treatment in the US, if not the world. The purpose of this study was to challenge the performance of the plant with typical groundwater pollutants, propose a kinetic model for the process, and confirm past laboratory and pilot studies. Groundwater containing up to 447 {micro}g/L TCE and 163 {micro}g/L PCE was treated to below the maximum contaminant (MCL) level of 5 {micro}g/L. The optimum H{sub 2}O{sub 2}/O{sub 3} dose ratio was 0.5--0.6. Removal efficiency of TCE and PCE declined as groundwater alkalinity increased. Investigation of by-product formation showed formation of assimilable organic carbon and bromate following the treatment process. A kinetic model calibrated using the experimental data predicted the concentration of TCE and PCE in the finished water reasonably well.

• OSTI ID: 524725
• Journal Information: Journal of the American Water Works Association, Journal Name: Journal of the American Water Works Association Journal Issue: 8 Vol. 89; ISSN 0003-150X; ISSN JAWWA5
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CHLORINATED ALIPHATIC HYDROCARBONS
GROUND WATER
MATHEMATICAL MODELS
REMEDIAL ACTION
TECHNOLOGY ASSESSMENT