Ozonation of Diesel Range Petroleum Hydrocarbon
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Abstract
The use of diesel fuel in waterways transportation often leads to contamination of petroleum hydrocarbon in the environment with adverse effects on water quality and aquatic lives. While bioremediation has limitations in petroleum removal, chemical oxidation is more promising. Ozonation is an effective process for treating organic matters. This study investigated the effect of ozone on diesel range hydrocarbon using synthetic water sample with 100 and 500 mgTPH/L. The experiment was conducted in a batch reactor with ozone supplied from a small scale generator (32.64 mgO3/min). Total Petroleum Hydrocarbon (TPH) removal of 87 and 90% were achieved, in 100 and 500 mgTPH/L respectively, with the removal capability of 0.75 mgTPH/mgO3. After ozonation, aliphatic fraction of diesel range hydrocarbon (C10 – C28) was reduced to some extent. Of all the 6 Polycyclic Aromatic Hydrocarbons (PAHs), present in smaller amount in raw sample, only Naphthalene remained after ozonation. With sufficient ozone dosage, biodegradable portions of TPH were removed. Biodegradability of TPH was very low with BOD removal rate constant (KT) of 0.14 and
0.10 d-1. The values were lowered to 0.07 and 0.04 d-1 after the ozonation treatment.
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References
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