Effectiveness of Ozonation and Activated Carbon Process, Separately and Catalytic, for Reducing Toxicity of Water Soluble Fraction of Crude Oil in Rainbow Trout Larva

Crude oil is a very complex composition containing thousands of hydrocarbons with different structure. Many compounds in crude oil, if entering in drinking, water can harmful on human health.
the effect of ozonation and powdered activated carbon separately and together for reducing the toxicity of crude oil in the water has been investigated. For toxicity test, different concentrations of water soluble fraction of crude oil in water and larvaeofrainbow trout were used. Before and after ozonatiopn and adding powder activated carbon, TOC and bioassay test was performed and the results were compared.
Findings: the ozonation at concentrations of 1 to 10 mg/l reduced the toxicity from 1.5 to 4 times. While, the use of activated carbon in concentration of 10 to 60 mg/l could decrease the toxicity in triplicate. The use of activated carbon and ozone in catalytic process can reduce the toxicity of the samples about 5 times.
the ozonation of the samples prior to activated carbon increases the adsorption and leads to better reduction of TOC and toxicity.