Details

Autor(en) / Beteiligte

• Takeuchi, Mio
• Nanba, Kenji
• Iwamoto, Hiroshi
• Nirei, Hisashi
• Kusuda, Takashi
• Kazaoka, Osamu
• Owaki, Masato
• Furuya, Ken

Titel

In situ bioremediation of a cis-dichloroethylene-contaminated aquifer utilizing methane-rich groundwater from an uncontaminated aquifer

Ist Teil von

• Water research (Oxford), 2005-06, Vol.39 (11), p.2438-2444

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2005

Quelle

MEDLINE

Beschreibungen/Notizen

• At a trichloroethylene (TCE)-contaminated site in Chikura, Chiba, Japan, TCE had spread over to the first and second aquifers over years. After 8 years of pumping and treatment, finally derivative of TCE, cis-dichloroethylene (c-DCE) remained only in the second aquifer. In this study, feasibility of a low cost in situ bioremediation utilizing groundwater of the third aquifer, which contained natural dissolved methane possibly derived from natural gas field nearby, to stimulate methane-oxidizing bacteria was examined. In vitro experiment showed that a mixture of the groundwater from the second and third aquifers stimulated a growth of methane oxidizing bacteria and enhanced c-DCE degradation. The groundwater of the third aquifer was introduced into the second aquifer in situ. The population of methanotrophs with high V max and K m for methane uptake increased, resulting in successful degradation of c-DCE at a monitoring well 2 m downgradient of the injection well.