Szukana fraza: [Abstract = "The total concentration of tested PAHs before oxidation reached the value of 995 \?g\/L. The average content of organic pollutants determined by the chemical oxygen demand \(COD\) was 538 mg\/L, while the average content of Total organic carbon \(TOC\) was 180 mg \/L. The use of sodium percarbonate caused the oxidation of organic pollutants and lowering of COD and TOC in the following ranges\: 22\-46% and 10\-30%."]

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