Marika KANAYAMA
Evaluation of removal capacity of mutagen formation potential (MFP) n road runoff by soil column experiment
Toshiya KOMATSU, Shuji HIMENO
To assure the sustainable urban water cycle, it is necessary to establish the self-regulated urban water recycle and reuse system. In particular, water management based on the groundwater replenishment has been expected. Infiltration of road runoff is a promising option for the groundwater replenishment.
Our previous results revealed that the level of mutagen formation potential (MFP) on chlorination of road runoff was relatively high. In the present study, MFP of a road runoff and the effluent after soil column infiltration was measured by Ames mutagenicity assay using S.tyhimurium strain TA100 without S9 mix. In addition, columns in which 10% volume of an activated carbon (AC) was mixed with the soil were operated. Actual road runoff equivalent to approximately 10 years of rainfalls was passed through the column soils at intermittent conditions.
The MFP of the influent road runoff was around 8300 net rev. / L, whereas that of the soil column effluent was around 1500 net rev. / L. Consequently, mutagen precursors in road runoff were effectively removed by the columns. The MFP of the effluent of AC mixed columns was as low as around 500 net rev. / L. It was suggested that the mutagen precursors were efficiently removed both by adsorption and biodegradation in the AC mixed columns.
Please use "previous botton" to return the previous page