| 摘要 |
In this invention, a fractionation apparatus (200) for fractionating dioxins is filled with a purification layer (220) and adsorption layers (230). Said adsorption layers (230) include the following: a first adsorption layer (240) that contains an activated-carbon-containing silica-gel layer (241) and a graphite-containing silica-gel layer (242); and a second adsorption layer (250) that contains an aluminum-oxide layer (251). When a dioxin solution is fed into the purification layer (220) and an aliphatic-hydrocarbon solvent is supplied, said solvent dissolves the dioxins in the dioxin solution and passes through the purification layer (220) and the adsorption layers (230). When that happens, the dioxins are fractionated into mono-ortho PCBs and a group containing non-ortho PCBs, PCDDs, and PCDFs, as follows: non-ortho PCBs, PCDDs, and PCDFs are adsorbed onto the first adsorption layer (240) and mono-ortho PCBs are adsorbed onto the second adsorption layer (250). |
