Abstract
The results of investigations on the efficiency of the removal of polycyclic aromatic hydrocarbons (PAHs) from wastewater exposed to UV radiation are presented. The investigations were carried out using wastewater originating from an industrial treatment plant. Samples of wastewater were exposed to UV rays for 30, 60, and 90 s. After exposition to UV rays, PAHs concentration was determined in the samples. Extraction of PAHs from samples was made with the mixture of: cyclohexane and dichloromethane. The quantitative analysis of PAHs by high performance liquid chromatography with a fluorimetric detector was carried out. After exposition to ultraviolet rays, a decrease in PAHs concentration in the samples was observed. Exposure of wastewater to UV-rays resulted in a decrease in the concentration of PAHs in wastewater from an industrial wastewater treatment plant up to 50%. The efficiency of the removal for individual hydrocarbons was varied as it was in the range of 5–67%. The half-life time of hydrocarbons (without naphthalene) was in the range of 64–123 s under exposition to UV rays.
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