バイオレメディエーション (2)

[VII-31] Laboratory Study on Technique for Preventing Diffusion of Cyanogen Contaminated Groundwater

*緒方 浩基¹、大西 健司²、日野 良太² (1. 大林組　技術研究所　自然環境技術研究部、2. 大林組　エンジニアリング本部　環境技術第二部)

Keywords:Cyanogen, Groundwater, Contamination, Preventing Diffusion, Bioremediation

Groundwater in some sites of metal plating factory etc. is contaminated by cyanogen. Pumping up contaminated groundwater could be applied for preventing diffusion of it. But pumping up groundwater is needed for water treatment facility. The developed technique is a low-cost technique that both a sustained release microbial nutrient and a cyanogen insolubilization agent are injected in wells without on-site facility. Laboratory tests showed that this technique can prevent diffusion of cyanogen contaminated water which is more than the volume of 10 years groundwater flow by a guideline of Ministry of the Environment. This technique also can continue by additional injection of a microbial nutrient.