| Abstract [eng] |
The aim of this study was to determine the effectiveness of different chemical oxidants in cleaning bitumen-contaminated soil. The object of the experiment is soil contaminated with bitumen under laboratory conditions. Bitumen concentration in soil - 33g/kg. After reviewing the scientific literature, it was decided to use hydrogen peroxide, potassium permaganate, Fenton's solution, and modified Fenton's solution as chemical oxidants. During the experiment, 5 different types of samples (10 in total) were prepared. NPK fertilizer (16 g in each) was used in all samples. The first sample was a control and did not use any oxidizers, only NPK fertilizers. In the second sample, 8 g of hydrogen peroxide were added, for the third sample 5.22 g of potassium permaganate were used. Fenton's solution (8 g of hydrogen peroxide + 0.8 g of ferrous sulfate) was used in the fourth sample. In the fifth sample, a modified Fenton solution (8 g of hydrogen peroxide + 1.6 g of ferrous sulfate + 1.6 g of citric acid) was prepared. To determine the efficiency of the chemical oxidants, the concentrations of total petroleum hydrocarbons and polycyclic aromatic hydrocarbons were measured using gas chromatography throughout the experiment. Samples were taken for analysis for the first time two weeks after the start of the experiment, then weekly for a month, as this period should be the time of the most intense decomposition of petroleum products. |
