Extraction of polychlorinated biphenyl with supercritical carbon dioxide, sulfur hexafluoride and subcritical water.
In the extraction of spiked PCB from soil, three extracting fluids were investigated: supercritical carbon dioxide (CO2), supercritical sulfur hexafluoride (SF6) and subcritical water. Among the tested fluids SF6 appeared to be appropriate especially for the extraction of low polar PCB. CO2 and water were found to be suitable for the quantitative extraction of all PCB. Water was judged as the best because of its low price, good availability and environmental safety.
Bayer AG, Landwirtschaftszentrum, Monheim, Germany.
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Wenclawiak
D002245:Carbon Dioxide / Q000737:chemistry / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000302:isolation & purification*; D011791:Quartz; D012822:Silicon Dioxide / Q000737:chemistry; D012989:Soil Pollutants / Q000302:isolation & purification*; D012997:Solvents / Q000737:chemistry / Q000378:metabolism*; D013459:Sulfur Hexafluoride / Q000737:chemistry / Q000378:metabolism; D013696:Temperature; D014867:Water / Q000737:chemistry / Q000378:metabolism
D012989:Soil Pollutants; D012997:Solvents; D014867:Water; D002245:Carbon Dioxide; D011791:Quartz; D012822:Silicon Dioxide; D011078:Polychlorinated Biphenyls; D013459:Sulfur Hexafluoride