Pressurized hot water extraction coupled with supercritical water oxidation in remediation of sand and soil containing PAHs
作者： Juhani Kronholm , Jarno Kalpala , Kari Hartonen , Marja-Liisa Riekkola
DOI: 10.1016/S0896-8446(02)00008-6
关键词:
摘要: Water is an alternative solvent and reaction medium compatible with green ideology. Extraction pressurized hot water (PHW) oxidation supercritical (SCW) are techniques that exploit the altered physico-chemical properties of heated for treatment solid liquid wastes. On-line coupled extraction (PHWE) (SCWO) equipment was constructed to extract polyaromatic hydrocarbons (PAHs) from sea sand a real soil sample break down compounds through hydrogen peroxide. Overall, best recoveries were obtained at 300 °C 20 min time. The highest molecular mass most difficult extract. Compared Soxhlet extraction, PHWE gave better recoveries, especially low mass. efficiencies (conversions PAHs) increased oxidant concentration Conversions other than PAHs good total organic carbon clearly decreased under optimized conditions. Technically performed safely effectively, PHWE-SCWO procedure efficiencies.
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