In situ and on site bioprecipitation of heavy metals from groundwater

摘要

The use of bacteria for the removal of heavy metals from contaminated groundwater is presented by two examples. The first one utilizes in situ bioprecipitation of the heavy metals in the unsaturated zone. The system is based on the induction of sulphate reducing bacteria by addition of a specific carbon source. The second system is based on a pump & treat system and utilizes san filters inoculated with heavy metals bioprecipitating and biosorbing bacteria to remove the metals from the pumped groundwater on site. Special attention is also paid to the biodegradation of BTEX in the presence of heavy metals (mixed waste).