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- W1969620111 abstract "Chemical processes utilizing water both as extraction solvent and reaction medium are promising Green Chemistry alternatives to conventional techniques. Equipment for on-line coupled hot water extraction and supercritical water oxidation was constructed to extract polyaromatic hydrocarbons and toluene from sea sand followed by oxidation using hydrogen peroxide. The effectiveness of the technique is based on the physico-chemical properties of heated and pressurized water. Extraction efficiency increased with temperature and time; the best results were obtained at 300 degrees C with 40 min extraction time. In the oxidation stage, conversion of the PAHs increased with reaction time and oxidant concentration and the best conversion (97.0-99.9%, depending on the compound) was obtained at 425 degrees C with 43 s reaction time. Benzaldehyde and benzoic acid were the most abundant reaction intermediates in the oxidation process. In addition, phenol, p-cresol, and benzyl alcohol were found as intermediates. The intermediates originated mainly from toluene, which was present in much greater concentration than PAHs in the reaction medium." @default.
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- W1969620111 date "2003-01-01" @default.
- W1969620111 modified "2023-10-10" @default.
- W1969620111 title "Destruction of PAHs from soil by using pressurized hot water extraction coupled with supercritical water oxidation" @default.
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- W1969620111 doi "https://doi.org/10.1016/s0956-053x(02)00045-4" @default.
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