ISCO with Fenton's Reagent for Treatment of a Pharmaceutical Waste Mixture: A Field Study(PPT)

摘要

The K?rgard Plantage megasite on the western coast of Denmark represents one of the most difficult remediation challenges in Scandinavia. Disposal of an estimated 280,000 metric tons of pharmaceutical wastes at the site from 1956 to 1973 resulted in the development of a complex mixture of contaminants in soil and groundwater, including sulfonamides, barbiturates, aniline, pyridine, chlorinated solvents (chloroethenes), fuel hydrocarbons, mercury, cyanide, lithium and many other compounds. Wastes were disposed in six pits that continue to leach contaminants to groundwater. Significant quantities of tetrachloroethene (PCE) remain as dense nonaqueous-phase liquid (DNAPL) in certain areas of the site. Contaminants in groundwater are estimated to discharge into the ocean at a rate of 20 metric tons/year, and public health concerns have prompted the closing of a 1.5 kilometer section of beach at the site. In 2008, two of the waste pits were excavated to the water table, and the project is currently focused on evaluating alternative in situ technologies for remediation of the residual wastes below the water table.