The reaction between trichloroethene in polluted groundwater and a sand filter mixed with zero-valent metals

摘要

The effect of an iron/nickel/sand combination on the degradation reaction of trichloroethene in polluted groundwater has been investigated in batch by experiments in laboratory. The results of these investigations have been used in field. A pilot plant build as a reactive sand filter was supplied with polluted groundwater. The water was pumped directly from one of more due to the pollution closed water wells. The filter should act as a reactive permeable barrier. In defiance of a special high oxygen content perhaps counterbalanced by a relatively low pH we obtained a half-time between 30 and 35 min with a residence time of the water in the active part of the filter of 3.1 h. The filter showed to be able to treat least 8 m~3 water/m~3 active filter/day.