| 摘要 |
PCT No. PCT/GB92/00759 Sec. 371 Date Oct. 22, 1993 Sec. 102(e) Date Oct. 22, 1993 PCT Filed Apr. 24, 1992 PCT Pub. No. WO90/19556 PCT Pub. Date Nov. 12, 1992.Water contaminated with halogenated organics, including chloroform, trichloroethane, solvents, pesticides, etc. is treated by passing the water through a permeable mixture of activated carbon and iron fillings. When the mixture is brought to a negative Eh voltae, the metal causes the contaminants to undergo chemical breakdown. The activated carbon acts to retard the contaminant, giving it a long residence time close to the iron. The negative Eh conditions demand oxygen exclusion, such that a favoured application is to place the mixture in a trench below the water table in an aquifer, in the path of a plume of contaminant. The mixture may also be contained in a tank above, or in, the ground. An inert filler material, such as sand, may be included in the mixture.
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