Oxidation of chlorinated benzenes using advanced oxidation processes

Journal Article · Tue Dec 31 04:00:00 UTC 1996 · Hazardous Waste and Hazardous Materials

DOI:https://doi.org/10.1089/hwm.1996.13.265· OSTI ID:443831

Masten, S J; Shu, Minmin; Galbraith, M J; Davies, S H.R. ^[1]

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1. Michigan State Univ., East Lansing, MI (United States)

The oxidation of 1,2-dichlorobenzene (DCB), 1,3,5-trichlorobenzene (TCB) and pentanoic acid (PA) by ozone, ozone/H{sub 2}O{sub 2} and ozone/UV/H{sub 2}O{sub 2} was studied. The greatest removal of TCB using ozone/H{sub 2}O{sub 2} treatment was achieved using a H{sub 2}O{sub 2} concentration of 60 {mu}M. At pH values <6, ozone/UV performed significantly better than the other processes. However, at circumneutral pH, the removal efficiencies of TCB and DCB by the three AOPs were nearly equal ({approximately} 97% for TCB; 98% for DCB). At high pH (>9) the removal efficiencies for all processes studied were nearly equal. The DCB and TCB removal efficiencies for all the processes studied were usually lower when humic acid was present, however, at a concentration of 1.6 mg/L humic acid slightly enhanced the rate of TCB and PA degradation by ozone. For all the processes studied the rates of oxidation of TCB and DCB were significantly slower in the presence of added bicarbonate. In the systems studied, it appears that the reaction of DCB, TCB and PA with OH is primarily responsible for the degradation of these compounds. Estimates of the steady-state OH concentrations were made using the PA data. The concentration of OH ranged from 6 x 10{sup -14} to 6 x 10{sup -12} M. 25 refs., 12 figs., 3 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 443831
• Journal Information: Hazardous Waste and Hazardous Materials, Journal Name: Hazardous Waste and Hazardous Materials Journal Issue: 2 Vol. 13; ISSN 0882-5696; ISSN HWHME2
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BENZENE
CHLORINATED AROMATIC HYDROCARBONS
HUMIC ACIDS
HYDROGEN PEROXIDE
HYDROXYL RADICALS
OXIDATION
OZONE
PH VALUE
WASTE PROCESSING