Permeable barriers at creosote and PNAH containing sediments require a barrier which is permeable and, at the same time, traps creosote and PNAH plumes. Such plumes can also include such organic hydrocarbons as PCP and other chlorinated phenolic compounds, PCB's and BTEX's. Lab tests and actual field applications have shown that organically modified clays are an excellent medium to trap such compounds in groundwater and in sediments at old MPG sites. The PNAH compounds include naphthalene, pyrene, fluorine, anthrazene and others. Organoclays are very well suited to trap these compounds efficiently. Since pesticides are also a serious problem for groundwater and sediments, a brief literature review is included. This article reports on various laboratory tests and actual field results, which have been obtained over the years, showing the suitability of organoclays as a component of permeable barriers.
Alther, George R.
"The Versatility Of Organoclays For Permeable Barriers,"
Proceedings of the Annual International Conference on Soils, Sediments, Water and Energy:
Vol. 12, Article 22.
Available at: http://scholarworks.umass.edu/soilsproceedings/vol12/iss1/22